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Peer-Review, Revenge, Tetlock , Mandelbrot, Asness, BS Vendors, Science | Twitter

On 6/1/20 Twitter retired ‘old twitter’ and broke my amateurish code that scraped NNT’s tweets. Working on a new version.

Tail risk of contagious diseases

@nntaleb (A boring dispute w/academics; ignore) Thanks @HietanenPaavo for sending this. Turns out @PTetlock is lying, claiming I made a private dispute public. There was NO private dispute; he just started a public harrassment campaign (“the “). Paavo linked   ” target=”_blank”>”> Permalink 9:16 AM – 1 Jun 2020

@threadreaderapp Hi, here is your unroll: @nntaleb: MASKS One comment about masks and nonlinearities that these imbeciles are not getting. Reducing exposure to   Talk to you soon. Permalink 8:58 AM – 1 Jun 2020

@nntaleb A reminder that 1) Science is hard, 2) Science depends on statistical inference, itself depends on probability.   Permalink 7:04 AM – 1 Jun 2020

@nntaleb Philologist friends, Is the root for מופת in anyway linked to muppistu in Akkadian? If not, what is the Semitic (or non-Semitic) root?   ” target=”_blank”>”> Permalink 6:13 AM – 1 Jun 2020

@nntaleb My full time professional specialty is squid ink. The rest are hobbies.   Permalink 7:24 PM – 31 May 2020

@nntaleb Tripple imbecile: I am offering PRECISE solutions. It is just that charlatans don’t like them.   ” target=”_blank”>”> Permalink 1:45 PM – 31 May 2020

@nntaleb 2/ Things that went intellectually bankrupt over the pandemics & will hardly recover: Epidemiology Fortune cookie (positive) “evidence” base science Bureaucratic topdown structures: WHO, CDC, UK Group Rent seeking academia can no longer be financed. Universities will crumble. Permalink 11:59 AM – 31 May 2020

@DrCirillo Ottimo italiano, Nassim. Bravo.   Permalink 11:49 AM – 31 May 2020

@nntaleb How you did in this pandemic, as a country, a village, a business, a group, or an individual, whether emotionally, economically, or morally, is an indication of how robust you are and how fit you will be for the next decades. Permalink 11:30 AM – 31 May 2020

@DrCirillo Qui, se interessa, parlo del rischio di coda nelle pandemie, sulla base del recente lavoro con @nntaleb. (the video is in Italian)   Permalink 11:19 AM – 31 May 2020

@paolarebeiz Results of Thawra petitions and protests to UNESCO. UNESCO is working on halting the contruction site!!! thank you all for your support! #UnescoKnowsWhatsRight #SaveNahrElKalb   Permalink 7:48 AM – 31 May 2020

@nntaleb Benefits of Quarantine: No restaurants: no seed oil, no bad grains. + More time to bust BS Vendors, read novels. + Weight loss 12lbs, resting heart rate 49 BPM. Permalink 6:32 AM – 31 May 2020

@nntaleb Pope Francis : Stop the destruction of a historical and cultural site in Nahr El-Kalb, Lebanon! – Sign the Petition!   via @Change Permalink 6:28 AM – 31 May 2020

@nntaleb Added to the book a comment on “evidence based” scientism   ” target=”_blank”>”> Permalink 5:34 AM – 31 May 2020

@nntaleb Look at the reactions to the warnings in Jan. We had a barrage of idiots many of whom deleted their tweets.   Permalink 5:44 PM – 30 May 2020

@nntaleb Takes very little effort to clean up as very few people cause most of the damage. However the strategy if to automate blocking of groups/friends as trolls operate in hordes. Very similar to viruse #FatTails. (Note that the same applies to BS vendors. Not many, but overactive)   Permalink 11:36 AM – 30 May 2020

@nntaleb “Restaurants are concave. Limited upside, larger downside (like short volatility). Mega-fragile to events and circumstances; nonportable and illiquid”.   Permalink 10:53 AM – 30 May 2020

@nntaleb 2) You all get organized, fight between one another (but no more blocking), etc. I will take care of the publishing (nonprofit). Permalink 10:14 AM – 30 May 2020

@nntaleb Corrected Permalink 8:29 AM – 30 May 2020

@nntaleb The point is that Fat Tonys and grandmothers don’t make the mistakes of those levels 0-3. Permalink 7:59 AM – 30 May 2020

@nntaleb Friends, we need to start a group to work on Lebanese (Levantine) language travel books for visitors diaspora. They usually go study Arabic taught by IYIs & can’t communicate. Published on Amzn @HsenAndil @Marcellenassif @turlevnon @Decafquest @Zzeghedrane @Extrachelle etc. Permalink 7:58 AM – 30 May 2020

@nntaleb The BS Vendors in probability. For those who don’t get my logic, here is a rank of knowledge in probability with level 0 Phil the rat @PTetlock and level 5 “Russian” probabilists. Unless one is Level 4, errors in probability can be harmful. Permalink 6:39 AM – 30 May 2020

@ektrit @nntaleb @Extrachelle @GregorySMcMuray @Eleni_Co @Marcellenassif @byzantinepower   Permalink 2:09 AM – 30 May 2020

@jdceulaer Ik schreef ook een essay over de catastrofe die corona heet, na lectuur van ⁦@nntaleb⁩ en gesprekken met ⁦@yaneerbaryam⁩ en ⁦@bslagter⁩. Over Zwarte Zwanen, Russische roulette en het mondmaskerdrama.   Permalink 9:59 PM – 29 May 2020

@nntaleb 100% of 200 worker test positive. Isn’t it a problem with a test that produces too many false positives? #Witgensteinsruler   via @business Permalink 5:21 PM – 29 May 2020

@nntaleb Bringing Risk Parity into this. It is a footnote since the entire apparatus of Modern Finance is busted.   ” target=”_blank”>”> Permalink 11:57 AM – 29 May 2020

@nntaleb Follow the least boring/most entertaining path. Nobody ever learned a new language from nerds. Twitter helps. Follow someone without translation. Or, better, fight with her/him to break the boredom.   Permalink 11:39 AM – 29 May 2020

@nntalebbot “You can tell how uninteresting a person is by asking him whom he finds interesting.” – @nntaleb Permalink 11:31 AM – 29 May 2020

@nntaleb Should I block @Mangan150 for defective logic & promoting harm? Permalink 8:43 AM – 29 May 2020

@nntaleb If you like them, wish them prosperity. If you dislike them, wish them extreme wealth. Permalink 8:39 AM – 29 May 2020

@nntaleb I signed the petition letter to the IMF re:situation in Lebanon and invite you to join   Permalink 6:02 AM – 29 May 2020

@ComTradGuru 8 years later, this article remains one of our favorite portraits of Maestro @nntaleb (by @carolecadwalla)   Permalink 12:38 AM – 29 May 2020

@nntaleb Un Decameron bilingue (italiano-spagnolo)! Per migliorare le due lingue. Sto cercando di piu! Permalink 6:41 PM – 28 May 2020

@nntaleb For acceptance, we require a SINGLE paragraph bio. No fluff, etc. For scholarship, can be 1 ½ paragraphs. Permalink 12:55 PM – 28 May 2020

@nntaleb RWRI 14: Will be online, but stretched over 2 weeks. August 10-21 weekdays 8:30-12 noon EST (3:30-7 PM Damascus time, 2:30-6 PM Palermo time) We accept bitcoins. No more 2 days, all 10 days. We offer 20-40% scholarships. 11 Instructors (list TBA)   Permalink 12:54 PM – 28 May 2020

@nntaleb BS vendors unite So Phil the rat @PTetlock enters a debate in a subject he knows NOTHING about, in a situation beyond his understanding (I was attacked by Asness who blew a fuse, not the opposite for saying the Ilmanen study was BS). Simply…because I busted him as a BS vendor Permalink 12:19 PM – 28 May 2020

@nntaleb Lopez de Prado does not stop at academic credentials.   Permalink 8:32 AM – 28 May 2020

@nntaleb Evidence that at least 21,198 persons on Twitter do not understand meta-problems. #Russell #LiarParadox #Epimenedes #Godel   Permalink 7:43 AM – 28 May 2020

@nntaleb @fotpetr Permalink 4:15 AM – 28 May 2020

@nntaleb Looks like there is BEFORE and AFTER with @lopezdeprado after I blocked him for inflation of credentials (few citations to support a “most read” claim)   ” target=”_blank”>″> Permalink 7:13 PM – 27 May 2020

@nntaleb Clearer Permalink 6:58 PM – 27 May 2020

@nntaleb SEMITIC PHILOLOGY PUZZLE Friends, help. @bmiloy is interested in meaning of מוֹפְתִ֗ים. Turns out 2 strange things 1) Why is מֹפְתִ֤ים also spelled מוֹפְתִ֗ים ? 2) The Hb Mofti מוֹפְתִי (exemplary) comes from the root מפְתִ (kotel), Why is MFTI مفتي with root FT’ فتا ? Permalink 6:52 PM – 27 May 2020

@nntaleb If you EVER catch me discuss a book I haven’t read, I shut my Twitter acct & leave public life. (Exceptions: excerpts Das Kapital, Smith’s TMS, AlFarabi) (PS. I despise pple who discuss my ideas w/o having read my books.) Below: Read Pinker & other crap   Permalink 3:02 PM – 27 May 2020

@nntaleb It seems to be a paradox because r has a finite mean but X has an infinite mean. cc: @spyrosmakrid @fotpetr Permalink 2:12 PM – 27 May 2020

@nntaleb Comment on the Cirillo and Taleb (2020) “Tail Risk of Contagious Diseases”: the rate of growth of fatalities may be predictable but, by what seems to be a paradox (it’s not), the quantity of fatalities is NOT. Permalink 2:05 PM – 27 May 2020

@nntaleb For our French friends who requested a conversation on Ellipticality: with Raphael Douady.   Permalink 10:08 AM – 27 May 2020

@nntaleb Glad to see people recreating stuff in my book.   Permalink 8:33 AM – 27 May 2020

@nntaleb People are starting to get it!! But I picked #AQR among all other representatives of the Flawed Mod. Finance because they keep publishing unrigorous crap about tail hedging & Ilmanen is verbalistic. (Sorry I can’t stand fools. #Rigor in reasoning).   Permalink 5:07 AM – 27 May 2020

@nntaleb Do polls work, that is, correctly represent preferences? Permalink 4:48 AM – 27 May 2020

@nntaleb Ellipticality (Technical) (My Probability Mooc)   via @YouTube Permalink 12:52 PM – 26 May 2020

@nntaleb SYMPOSIUM on ELLIPTICALITY and how it cancels diversification   Permalink 11:45 AM – 26 May 2020

@nntaleb The points presented by @CliffordAsness are far from technical. (BTW I am not blocking him so he can rebut as he wishes).   ” target=”_blank”>”> Permalink 10:25 AM – 26 May 2020

@NonMeek Today’s #Offshorecomic | #Tailhedge-deniers go | inspiration sparked by @nntaleb & @moritzheiden Help me pay my bills. Please!   ” target=”_blank”>”> Permalink 7:36 AM – 26 May 2020

@nntaleb SYMPOSIUM ON RISK PARITY Friends, in the wake of the road-rage by the lunatic of #AQR, @CliffordAsness, I will post short tutorial videos explaining the BS in theories of diversification. I will answer Qs here. Thread is v. technical. Nonscientific commentators will be blocked Permalink 7:04 AM – 26 May 2020

@reiyashi one man on his journey Permalink 5:54 AM – 26 May 2020

@mikeandallie 3/3 Following that not-so-great project I took a stab at explaining some of @nntaleb ‘s ideas on the sensitivity of virus models to inputs that, happily, are finally starting to get more attention today. Here’s that twitter thread:   Permalink 5:48 AM – 26 May 2020

@yaneerbaryam Four month anniversary still reads true @nntaleb @normonics #coronavirus   Permalink 4:39 AM – 26 May 2020

@GrahamAMcLeod V happy to see this new Nature Physics paper by Nassim Taleb – one of the few ppl to break consensus and warn of Coronavirus dangers as early as Jan 2020   ” target=”_blank”>”> Permalink 4:35 PM – 25 May 2020

@Covid19Digest “What @nntaleb understood, and what public health officials in places like Hong Kong, Taiwan, South Korea, and Vietnam understood, was that there was an asymmetry between overreacting and under-reacting.”   Permalink 3:20 PM – 25 May 2020

@TalebWisdom “Never hire an academic unless his function is to partake of the rituals of writing papers or taking exams.” – Nassim Nicholas Taleb in Skin in the Game Permalink 2:47 PM – 25 May 2020

@HarrisonSearles @yaneerbaryam and @nntaleb imagined that possibility in January.   Permalink 2:32 PM – 25 May 2020

@nntaleb   Permalink 11:59 AM – 25 May 2020

@nntaleb I sorely discovered from the Monsanto days that @reason was a shill house totally unreliable. It is in fact damaging to the liberty & localist movements. You must block everyone who writes there.   Permalink 11:29 AM – 25 May 2020

@nntaleb It is not about a long life Non ut diu vivamus curandum est sed ut satis (Seneca)   Permalink 11:05 AM – 25 May 2020

@octonion Even if every single person in New York City had already been infected, 0.3% of New York City would be about 24000, and New York City had already passed that in excess deaths by the end of April. In other words, this is complete nonsense.   Permalink 10:48 AM – 25 May 2020

@EricTopol The video of @DrCirillo and @nntaleb on this fat-tails paper, the tails-wags-the-dog and its important implications   ” target=”_blank”>”> Permalink 8:22 AM – 25 May 2020

@EricTopol The fat-tail phenomenon of pandemics, dating back to 429 BC and including #COVID19, is vital to recognize but tail-risk is largely ignored in current epidemiological models @DrCirillo @nntaleb @NaturePhysics ★ very perceptive work   @tudelft ” target=”_blank”>″> Permalink 8:14 AM – 25 May 2020

@nntaleb 11 AM Brooklyn std time (5 PM Palermo, 6 PM Aleppo) we discuss our paper on pandemics in Nature Physics. We +comment on verbalistic users of statistical buzzwords w/o understanding probability s.a. BS vendor @PTetlock+show error w/Ioannidis +propose basic probability training.   Permalink 6:52 AM – 25 May 2020

@nntaleb So @clairlemon barges & takes sides in into a conflict she knows nothing about, in a professional subject she knows nothing about, with a lunatic (@cliffordasness) the content of whose rants she understands nothing, simply because: YOURS TRULY is a party in the conflict.   Permalink 6:05 AM – 25 May 2020

@nntaleb Let me rephrase Would an online tuition of 60% of physical for executive education be Permalink 6:18 PM – 24 May 2020

@nntaleb Let me rephrase Would an online tuition of 60% of physical for executive education be Permalink 6:18 PM – 24 May 2020

@nntaleb Lung ventilators in Antifragile (2012). I later discussed in a scientific paper. Doctors don’t get convexity.   Permalink 2:41 PM – 24 May 2020

@nntaleb I cannot live in societies that spend trillions on nuclear weapons yet are incapable of delivering COVID testing to their populations. The world’s pseudosophistication & misallocation of resources have been increasing… Permalink 12:20 PM – 24 May 2020

@nntaleb What are online fees for executive programs as % of the physical? Permalink 11:57 AM – 24 May 2020

@nntaleb The date: most likely August Permalink 11:40 AM – 24 May 2020

@nntaleb Friends, we will be doing #RWRI 14 online. To accommodate people overseas it will be 2 weeks (10 days) 8-12 am EST (2-6 PM in Agrigento, Sicily). We still need to work out details and learn to use Zoom. Meanwhile women scholarships are open. Please check   Permalink 11:40 AM – 24 May 2020

@nntaleb One thing worse than being blamed for the wrong reason: being praised for the wrong reason. Permalink 11:25 AM – 24 May 2020

@Jasak98 “Al Zaytouni” restaurant in North-Lebanon Using Syriac and Garshouni in their menu. Permalink 11:01 AM – 24 May 2020

@DrCirillo An informal conversation with @nntaleb. Tomorrow, Monday 25, at 5pm (CET), in sync with the paper becoming openly available.   Permalink 9:32 AM – 24 May 2020

@Decafquest Oh look, @paugasol is readinh @nntaleb’s SITG   Permalink 5:27 AM – 24 May 2020

@HarryDCrane Part of understanding statistics is understanding when a single data point indicates more than just an anecdote, and also when a full analysis of a large dataset is nothing more than an anecdote.   Permalink 7:38 PM – 23 May 2020

@nntaleb 3eid Mbarak to those who celebrate! Permalink 11:20 AM – 23 May 2020

@nntaleb Excellent solution   Permalink 11:16 AM – 23 May 2020

@nntaleb Adding to book: Foundation of Risk Parity is, officially: 1) finite and KNOWN variance 2) ellipticality. Problem: variance is not projectable since kurtosis is patently infinite. No ellipticallity since infinite higher order moments. Also problem of preasymptotic behavior. Permalink 7:44 AM – 23 May 2020

@nntaleb Forgot to reference the lunatic of #AQR, @CliffordAsness Permalink 7:02 AM – 23 May 2020

@HarryDCrane Soon to be accompanied by the inaugural “No BS Probability Conference” 1-day event (online) hosted by @researchersone and possibly other sponsors. Permalink 6:59 AM – 23 May 2020

@nntaleb Friends, 1st printing is pre-sold out so I can correct mistakes in MS for a quick 2nd printing that shd hit 10 d later. Comments welcome!   The discussion w/the lunatic of #AQR is my point that their entire analytic apparatus is incompatible with fat tails. Permalink 6:52 AM – 23 May 2020

@nntaleb No, I am NOT a polymath. I abhore the notion of polymaths. I have a single field: PROBABILITY/RISK/UNCERTAINTY and it happens to be at the core of many fields. Philology & literature are hobbies, not professional contributions.   Permalink 5:59 AM – 23 May 2020

@nntaleb No, I did not block Marcos López de Prado @lopezdeprado because of his comments. I had blocked him weeks ago when I saw these claims in his bio. Permalink 5:20 AM – 23 May 2020

@nntaleb Same for exponent. Seems impossible to solve the composition analytically. Permalink 5:11 AM – 23 May 2020

@nntaleb CHEATING: By simulation the base is ½ and converges quickly. We cannot use traditional methods because the “generator” function f has a second argument in it, here p. Permalink 4:58 AM – 23 May 2020

@nntaleb If you describe an early precautionary reaction as conscious panic, it confuses your detractors…   Permalink 5:21 PM – 22 May 2020

@nntaleb This may take 5 min or part of the weekend. (please no comments by non-math amateurs). Permalink 11:59 AM – 22 May 2020

@nntaleb Thread. When someone says “you’re panicking” say “Yes, what’s wrong with such a risk management approach?” When someone says “you’re an asshole”, answer “yes, what’s wrong being asshole with the arrogant”, etc.   Permalink 10:42 AM – 22 May 2020

@nntaleb 5/n Mandelbrot has a monstrous scientific erudition & a yuuge curiosity. He knew arcane math stuff only autodidacts know. But he respected erudition much more than scientific rank, based on his fascinations with polyglot characters like Jean de Menasce.   ” target=”_blank”>”> Permalink 10:02 AM – 22 May 2020

@nntaleb Did Pinker do another “empirical” analysis to figure out if those who believe in the afterlife have a statitically significant shorter life expectancy? No. You never never miss with Pinker. Wherever he ventures, he manages to produce BS.   Permalink 9:42 AM – 22 May 2020

@nntaleb 2/ I am not used to psychiatricize people; first time I do it as Asness (henceforth “The Lunatic of AQR”) stupidly went into such claims. Permalink 9:34 AM – 22 May 2020

@nntaleb NARCISSISTIC RAGE: HOW ASNESS BLEW A FUSE One shd resist making psychiatric claims, excepty for situations where 100% self evident. Busted #AQR: 1) Fails to deliver claims, 2) Uses pseudoscientific analytics not for fat tails. =>Asness goes nuts.   ” target=”_blank”>”> Permalink 9:28 AM – 22 May 2020

@nntaleb 4/n The great Mandelbrot was 100% uncompromising. But he suffered because he cared abt honors & academic status; he depended on a certain establishment. So I learned from him to do opposite 1) be 100% independent, 2) Do theorems & proofs (which, being intuitive, he hated). Permalink 5:50 AM – 22 May 2020

@nntaleb 3/n Mandelbrot’s contempt for Fama prompted to ignore story in book but it is revived by the connection to the *AQR lunatic* the disgusting @CliffordAsness Fat tails invalidate the tools of finance and Fama is indeed by his own admission unscientific.   Permalink 5:32 AM – 22 May 2020

@nntaleb 2/n Fama’s reasons was that Fat Tails were “incompatible with the tools in social science”. It’s like using the map of Tokyo in Mexico because “here is a map”. I actually wrote to Fama & got same HORRENDOUS answer. Mandelbrot saw Fama never understood the CONSEQUENCES of tails. Permalink 5:25 AM – 22 May 2020

@nntaleb 1/n The great Mandelbrot despised Fama whom he found both clueless & dishonorable. Fama was a French major & M supervised his thesis; they applied the Levy-Stable Distribution for markets (mistake since it’s a limit not met preasymtotically). Then Fama turned on M to use MPT. Permalink 5:20 AM – 22 May 2020

@nntaleb Grazie amici! L’autore piu suggerito qui e Calvino; e il piu facile da leggere? Leggere la letteratura in una lingua straniera e molto difficile; qual e il libro piu semplice di Calvino? Permalink 4:35 AM – 22 May 2020

@nntaleb We need some help from philologists (including maestros @Safaitic & @PhDniX) about the strange verb دمغ for “killing by damaging one’s head”.   Permalink 4:19 AM – 22 May 2020

@nntaleb Here we go, @sapinker will never disappoint. You bust his BS in one field, he appears in another.   Permalink 8:14 PM – 21 May 2020

@nntaleb Google finally discovering that Lebanese is not Arabic. Permalink 2:27 PM – 21 May 2020

@nntaleb نحنا منئول بلكورة ” الغايب عزرو معوا”   Permalink 2:17 PM – 21 May 2020

@nntaleb 13) The book STAT CONS OF FAT TAILS is freely available in PDF here (easier to read than ArXiv).   Permalink 2:11 PM – 21 May 2020

@nntaleb Com’e Eco in italiano? Facile? Permalink 1:39 PM – 21 May 2020

@nntaleb Amici italiani, Sto cercando un romanzo facile da leggere in italiano. Sono stato sorpreso di scoprire che la Moravia è molto più ricca e difficile da leggere rispetto, per esempio, a Machiavelli. Qual è il più semplice? Che ne dite di? Barico? Di Lampedusa? Schiaschia? Altri? Permalink 1:29 PM – 21 May 2020

@nntaleb (Note: I am not connected to @TalebWisdom). Robb’s book, it is safe to say, is still on my mind 13 years later!   Permalink 10:10 AM – 21 May 2020

@nntaleb 12) Taking stock: AQR pans general tail hedging as a loser’s game. Universa’s risk mitigated portfolio life to date (and BEFORE 2020) outperforms SPX—by slashing risk. AQR portfolios, …, not so much. MPT is smoke and mirrors, topic of my new book.   Permalink 7:21 AM – 21 May 2020

@nntaleb 11) Next time, @CliffordAsness someone tries to have lunch with you to discuss risk parity & things, do not blow him away unceremoniously claiming you don’t eat his food. It would have avoided you the embarrassment of these genuine but highly unscientific outbursts. Permalink 7:19 AM – 21 May 2020

@nntaleb The responses of Cliff Asness @CliffordAsness too this thread have been vastly… nontechnical.   ” target=”_blank”>”> Permalink 5:01 AM – 21 May 2020

@nntaleb 10) The responses by @CliffordAsness to this thread have been vastly …nontechnical. Permalink 4:55 AM – 21 May 2020

@nntaleb #Lindy! That’s the way to do science without the rentseekingacademiconasalary gaming the system.   Permalink 4:16 AM – 21 May 2020

@enzolamberti Buongiorno @hugowiz , did you have your @NonMeek #brikka coffee yet? Permalink 12:32 AM – 21 May 2020

@nntaleb 9) For the general public watching the road rage of Mr Asness who misreplied to my last post: The claims by AQR is: tail risk is not needed by funds because there are ways to do it better. As we are finding out: the performance of AQR doesn’t show it.   Permalink 6:56 PM – 20 May 2020

@nntaleb The entire point is by that by cricitizing a tail risk mitigation via OTM options one would expect AQR’s risk mitigation to be better. It’s not and that’s the story. (I also insist that there is was never a PERSONAL mention of Cliff Aness, just AQR.)   Permalink 6:23 PM – 20 May 2020

@nntaleb 7/n Perhaps Mr Asness can show us empiricists, with the benefit of hindsight, which fund he wants us to pick to get the relative performance. PS- I have no interest in Asness, not even AQR, but they can’t get away w/nonsensical claims abt tail risk.   ” target=”_blank”>”> Permalink 6:05 PM – 20 May 2020

@nntaleb 6/n Perhaps Mr Asness should show us which of his funds we should look at, and since his answer has a psychiatry dimension, we turn to some psychiatry.   ” target=”_blank”>”> Permalink 5:27 PM – 20 May 2020

@nntaleb 5/n #AQR Make AQR aware that OTM options have >> fatter tails than underlying (+ one-tailed), hence hidden moment are substantial. Similar to floods. “Empirical” simulations are not predictive in the naive intrapolative way.   Permalink 2:47 PM – 20 May 2020

@nntaleb PROBABILITY DU JOUR What You See and Don’t See: Hidden Moments of a Probability Distribution. The said “empirical” distribution hides stuff! Where is the hidden moment for n observations? Intuition of the results of paper below   Permalink 2:36 PM – 20 May 2020

@nntaleb 4/n #AQR Ilmanen the bullshitter (& the AQR team) among other things don’t seem to get that tail payoff != probability x payoff under fat tails. You need to include payoffs not part of this, and g(x) is convex (option payoffs by convexity are MUCH MORE FAT TAILED than underlying) Permalink 1:45 PM – 20 May 2020

@nntaleb 3/n Antti Ilmanen claims tails must be expensive from lottery tickets (but excludes 1987 crash); doesn’t get basics: Stat 102 does’t cover when assumptions are violated (Gauss-Markov, etc.) Fails to get Bayes’ rule. Note: while RISK PARITY is ~unique, tail hedges vary hugely. Permalink 1:27 PM – 20 May 2020

@john_f_hamer “Trust those who trust you and distrust those who are suspicious of others.”—Nassim Nicholas Taleb, The Bed of Procrustes (2nd edition) @nntaleb Permalink 12:40 PM – 20 May 2020

@DavidSalazarVir Yes! Although I had heard it before, I only got the consequences of it when I read your book and played around with simulations. It bogles my mind how much misunderstanding comes from not replicating everything in statistics. Thank you for saying it aloud! Permalink 9:37 AM – 20 May 2020

@nntaleb 2/n (#AQR) Meanwhile Universa hedged portf outperformed SP while AQR crap and RISK PARITY junk underperformed. I cannot believe that AQR will issue claims from hypotheticals. Further they are mired in the probability distributions & metrics that have been amply debunked. Permalink 6:46 AM – 20 May 2020

@nntaleb 1/n AQR issued 2 flawed reports saying tail risk hedging doesn’t work (in theory), options are “expensive” Yet they did not reveal that 1) Their OWN risk premia strategies lost money. 2) Their other public crap underperforms the MKT. Insult to clients & the REAL WORLD. Permalink 6:41 AM – 20 May 2020

@nntaleb PROBABILITY DU JOUR Explaining with minimal complexity the non-ellipticality of probability distributions when the correlation is unstable. Explains the failures of RISK PARITY, some BS invention that sells to gullible clients innocent of probability. Permalink 6:21 AM – 20 May 2020

@nntaleb FRAGILITY, OVEROPTIMIZATION & COVID No, it’s not the lockdown that’s breaking NYC! Restaurants & hotels are so stretched (mostly rent) that they go bust after a 8-18% drop in rev/occupancy. Same w/theaters,museums. Real estate must adjust (distancing) #Convexity #Nonlinear Permalink 5:42 AM – 20 May 2020

@nntaleb This is central.   Permalink 12:53 PM – 19 May 2020

@nntaleb 3b/ Weightlifting from @CoachRippetoe & @GrantSSC, exercise/health from @GuruAnaerobic Levantine language from @HsenAndil, @Marcellenassif, @turlevnon & others And here and there from friends on Twitter Permalink 12:00 PM – 19 May 2020

@nntaleb 3a/ You can learn yuuuuugely from Twitter while playing. I learned Inequalities frm Maestro Bogomolny (RIP) & the FB Romanians Semitic philology frm @Safaitic & @PhDniX Latin frm @ArmandDAngour Computational math frm @WolframResearch History frm @holland_tom @DrMichaelBonner Permalink 11:52 AM – 19 May 2020

@nntaleb Voila, plus or minus a calculation error. Permalink 11:19 AM – 19 May 2020

@nntaleb 2/ #RWRI proved that experienced people are uniquely capable of teaching a real world subject: doctor trains doctor, nurse trains nurse (& doctor), risk takers train young risk takers (not some nerd), accountant train budding accountants, thief trains thief, prostitute trains… Permalink 10:42 AM – 19 May 2020

@Safaitic #coronaepigraphy day 63: Something for those interested in Greek linguistics: misspellings shed light on contemporary pronunciation. This Greek text accompanies a Safaitic inscription of a man named Maṭr of the lineage of ṣabāḥ (صباح). But look how the tribal name is spelled. Permalink 5:12 AM – 19 May 2020

@nntaleb 2) To visualize the intricacy, see my comments #RWRI on negative prices via arbitrage/squeezes. @johncarlosbaez Permalink 10:02 AM – 17 May 2020

@nntaleb We use negative probabilities in quant finance since probability is just a KERNEL inside an integral, rarely a “real thing” outside of binary payoffs. So long as *no arbitrage* is satisfied. Only thing that matters is (by scaling) ∫densities=1. Similar to negative prices in oil.   Permalink 10:00 AM – 17 May 2020

@nntaleb 1) The taste of (cold) revenge is by far the most underrated human experience. Not for cowards. Not be good for society except when revenge does not lead to more revenge. 2) Written ~170 y ago. I’ve never read more limpid more recent page turner. #Lindy = #ergodic seller!   Permalink 8:58 AM – 17 May 2020

@nntaleb By “find love” I meant “find love (in different categories of varying expected duration)”.   Permalink 8:22 AM – 16 May 2020

@nntaleb I like the peer-review system. It is necessary, but never sufficient. Also depends what you call “peers”. Peer-review of decision science papers in psychology is worthless. Permalink 8:12 AM – 16 May 2020

@nntaleb THE DEATH OF ACADEMIA: peer-review creates citation rings of high ignorance. The epidemiological models developed by @stephen_wolfram, his son, & @dzviovich in 1 or 2 afternoons were light years ahead of models by academia w/zillions of “peer reviewed” crap. As to finance… Permalink 7:10 AM – 16 May 2020

@nntaleb The Monsanto days are back: $$ buy science!   Permalink 5:00 PM – 15 May 2020

@dvassallo I’m from Malta (left 10yrs ago), and when people ask me how’s work culture in the US, this is what’s different.   Permalink 9:40 AM – 15 May 2020

@nntaleb The main function of a conference is to get a job, find love, corner potential customers during parties, or get a subsidized (or tax efficient) vacation. Content is merely a side effect. Online conferences need something else. Permalink 8:26 AM – 15 May 2020

@HietanenPaavo 2 I’d assume this is partially of what Prof @nntaleb means when he says “Govts don’t shut down economy, people do” Fins export business is worth 92 billion euros (article above)   Permalink 1:05 AM – 15 May 2020

@nntaleb This is how Umberto Eco’s library looked. Permalink 11:40 AM – 14 May 2020

@nntaleb Glad @RaminNasibov corrected. Umberto Eco’s library was 1) light, 2) modern w/white shelves (based on Ikea’s Billy), 3) comfortable and inviting. You felt like wanting to spend every Sunday afternoon there. This is dark, musty, uncomfortable, and … has too many books.   Permalink 11:33 AM – 14 May 2020

@birdxi1988 The simulation shows that even with R0<1, an epidemic may still be thriving somewhere in the country. I think ⁦@nntaleb⁩ mentioned this in January,as an average,R0 is biased downward because the outbreaks have fat tail due to “super-spreader“ events.   Permalink 10:01 AM – 14 May 2020

LOCALISM, “libertarians”, ADAPTATION, Justin Amash, @Reason, Marshmallowbrained Psychopaths, Ioannidis

Never use single point estimates for pandemics 5/13/20

@Monsantobuster Prof Taleb @PTetlock does not know what a probability distribution means. Permalink 8:10 AM – 14 May 2020

@bohemianGunjan “Panic is good only if you panic early, and as a trader the first thing you learn is to panic early”. – Nassim Nicholas Taleb. @nntaleb Amazing talk, thanks @MFBALA, @AyeshaFaridi1 Permalink 7:45 AM – 14 May 2020

@nntaleb Removed the black board   Permalink 4:17 AM – 14 May 2020

@nntaleb Ready in front of my blackboard ! #Voyage2020   Permalink 4:05 AM – 14 May 2020

@nntaleb   Permalink 5:26 PM – 13 May 2020

@mikeandallie Sharing ideas from @nntaleb ‘s “never use point estimates for pandemics” video with kids   #math #mathchat Permalink 4:08 PM – 13 May 2020

@nntaleb What I mean by LOCALISM. Linked to subsidiarity: you leave to HIGHER collective structures things that cannot be done by the individual, under constraints of liberty. We need govt where we can’t sue (systemic harm: viruses, GMOs, invasions). Govt is the systemic risk mgr. Permalink 1:35 PM – 13 May 2020

@nntaleb Never use single point estimates for pandemics   via @YouTube Permalink 1:27 PM – 13 May 2020

@nntaleb Voila   Permalink 10:07 AM – 13 May 2020

@nntaleb For pandemics if the average exists, about ~95-99.9% of observations would fall BELOW the average. Aside from the slow workings of the law of large numbers. Should I explain this in a short video? Permalink 5:24 AM – 13 May 2020

@nntaleb Paper with @DrCirillo forthcoming in Nature Physics later this week explaining the point, @mattwridley. Tail exponent <1, even possibly <½ means NEVER issue a single point forecast and NEVER present an average. Permalink 5:16 AM – 13 May 2020

@nntaleb ERRORS 101 Never produce a point estimate for risk management, esp. in a fat tailed domain, rather show statistical properties. Never judge a risk management stance from point forecasts. These errors are promoted by the Idiot of Pennsylvania, Phil the rat Tetlock @PTetlock.   Permalink 4:49 AM – 13 May 2020

@nntaleb Why you should NEVER have awards in academia.   Permalink 4:29 AM – 13 May 2020

@nntaleb No, @RaminNasibov that’s not Umberto Eco’s library. His library is below.   ” target=”_blank”>”> Permalink 4:20 AM – 13 May 2020

@nntaleb Post dinner, lockdown. Permalink 6:18 PM – 12 May 2020

@nntaleb Note the response to masks. Some people are “libertarians” because of a mental defect, a combination of severe inhibition of logical faculties coupled with sociopathic behaviors. Others like @justinamash are genuinely multiscale localists. Permalink 6:15 PM – 12 May 2020

@nntaleb Point isn’t even reopening. It is the preponderance of people without masks in stores!   Permalink 6:09 PM – 12 May 2020

@nntaleb Here is my adaptation: work with a *real* blackboard on zoom. Just finished a discussion with @fotpetr and @spyrosmakrid   Permalink 8:35 AM – 12 May 2020

@nntaleb Lebanon fared exceedinly well, <10 fatalities per million compared to > 500 per million in hot spots (& growing).   Permalink 2:47 AM – 12 May 2020

@nntaleb 3) Personal resets: I have been eating in restaurants 10 times a week… Hard to adapt to new environment because home eating can ~ food quality w/best ingredients but will never replace the exhilaration of an ambient crowd… Maybe they will reset & start garden restaurants! Permalink 4:01 PM – 11 May 2020

@nntaleb 2) Many small professional resets: learned to lecture on Zoom. Learned to set up a blackboard behind me for illustrations. Of course could start a business along these lines. Universities are going out of business & there is something to grab as they are too incompetent to adapt. Permalink 3:56 PM – 11 May 2020

@nntaleb ADAPTATION Do a total reset professionally, economically, personally. Treat this thing as if it were here to stay & make sure you can do with it. If it goes away, it will be a bonus but remember that the shadow of the following one will be progressively built into the system. Permalink 3:24 PM – 11 May 2020

@nntaleb And this for the sooooooo misunderstood law of large numbers   Permalink 11:25 AM – 11 May 2020

@nntaleb This is excellent. He is simulating from my book STATISTICAL CONSEQUENCES OF FAT TAILS. Advice to @DavidSalazarVir : increase n for large samples, to see the Mediocristan case go flat like a dinner table or the intellect of an economist.   Permalink 11:15 AM – 11 May 2020

@DellAnnaLuca Some numbers to back what @nntaleb has been saying for months: the economy tanking is in large measure a bottom-up process.   Permalink 9:03 PM – 10 May 2020

@nntaleb There we go, an intelligent version of libertarianism!   Permalink 1:00 PM – 10 May 2020

@BuddyCA64525731 Wonderful @nntaleb venn diagram on the right way to formalize and teach probability and risk. @macroarb @zoeharcombe   ” target=”_blank”>”> Permalink 8:54 AM – 10 May 2020

@DrSamPappas “Inflammation is the most frequent affection and the one showing the most number of varieties ..“ Galen of Pergamon ⁦@_Tom_Pappas⁩ ⁦@amyriolo⁩ @nntaleb⁩ Ancient Mediterranean wisdom already knew about #CytokineStorm Permalink 8:36 AM – 10 May 2020

@nntaleb Seond hint. I guess we’re done. Permalink 8:06 AM – 10 May 2020

@nntaleb If you want to drive a fool to insolvency, lend her or him some money. Permalink 7:44 AM – 10 May 2020

@MarcosCarreira Before affirming that children are “immune” and can be exposed to risky environments, remember that: (1) Many problems will not be diagnosed due to the avoidance of hospitals, doctors (2) Saying something never happens can be disproved by a single example (see attached) @nntaleb   ” target=”_blank”>”> Permalink 6:17 AM – 10 May 2020

@nntaleb Bottom up vs top down. The photo is BEFORE my weight loss. Very unfair.   Permalink 5:20 AM – 10 May 2020

@nntaleb נותנה ואינו יודע למי נותנה, נוטלה ואינו יודע ממי נוטלה. נותנה ואינו יודע למי נותנה, לאפוקי מדמר עוקבא…   Permalink 5:13 PM – 9 May 2020

@nntaleb Make your failings public; keep your virtues secret. Permalink 1:04 PM – 9 May 2020

@nntaleb Libertarianism reposes on the nonagression principle, which COMMANDS mask-wearing under the SILVER RULE. Permalink 8:32 AM – 9 May 2020

@nntaleb If you are a nonimbecile Libertarian, or localist, you want collective action to arise bottom up in a decentralized way. This is EXACTLY what is happening! Responses are largely local abt everywhere. #NonImbecileLibertarianism #NonPsychopathicLibertarianism #Localism   Permalink 8:26 AM – 9 May 2020

@nntaleb I am in Atlanta where restrts have been ALLOWED to open. The ones I know are closed. Nice to blame local governments. It was bottom up. Clearly, most of these “libertarians” are not just geronticidal sociopaths but defective in reasoning & empirical awareness. Permalink 6:59 PM – 8 May 2020

@nntaleb Indeed, a faux debate   Permalink 6:53 PM – 8 May 2020

@nntaleb Lockdowns (largely)followed individual behavior rather than the reverse. Except for teenagers who carry a tiny economic role.   Permalink 6:26 PM – 8 May 2020

@yaneerbaryam Why is the Batshit Crazy idea of Herd Immunity still with us? 1/4 Permalink 2:16 PM – 8 May 2020

@nntaleb The other problem is attending a lecture on Zoom tires you much more than one in the physical world. You need to focus with some intensity all the time, can’t get cues otherwise. Permalink 1:20 PM – 8 May 2020

@nntaleb Having been separated from my library & reading on an Ipad, it is w/yuuge relief (after 463 pages) to finally get the real thing! Digital is useful for some things, but one remembers much, much better what one touches, views in 3D, and smells. It’s like exiting a 2D prison. Permalink 1:17 PM – 8 May 2020

@nntaleb Publishers are indeed confused by my approach. Never separate words from aesthetics. This format is Lindy   ” target=”_blank”>”> Permalink 12:02 PM – 8 May 2020

@nntaleb Hint Permalink 10:08 AM – 8 May 2020

@nntaleb You know when it starts. Never when it ends…   Permalink 8:10 AM – 8 May 2020

@nntaleb Something to start the weekend with. Courtesy Dan Sitaru. Permalink 7:57 AM – 8 May 2020

@nntaleb “HEAVY BOX” : weighs 9 lbs. I wonder if I can add a volume without messing up the physical package. [PS –enjoy the Prosecco @ozwegian]   Permalink 3:10 PM – 7 May 2020

@normonics Yaneer has been tireless in tackling this pandemic. This makes me sick to my stomach   Permalink 12:20 PM – 7 May 2020

@nntaleb Never, never complain about your enemies. Only losers complain. Drive them to complain about you. Permalink 12:01 PM – 7 May 2020

@nntaleb Bi Masr byektbo bil Masré. Ma 3ndon 3e2dé! 7atta fi Wikipedia bil Masré!  الصفحه_الرئيسيه   Permalink 11:31 AM – 7 May 2020

@nntaleb Excellent question! Just as correlation/covariance do not properly measure informational distance, standard deviation/variance do not measure the degree of uncertainty. More effective is entropy and conditional entropy for downside. —- I ANSWER ALL LEGIT TECHNICAL QUESTIONS   ” target=”_blank”>”> Permalink 9:00 AM – 7 May 2020

@nntaleb South of Avignon is the Med France but Provencal is closer to Italian Permalink 7:21 AM – 7 May 2020

@nntaleb The French are Germanics who think they are Mediterraneans and speak a Latin language with a German accent. Permalink 7:16 AM – 7 May 2020

@nntaleb Solid statistical inference lies in destroying BS with a single but powerful data point. Disconfirmatory empiricism.   Permalink 3:17 AM – 7 May 2020

@nntaleb I get v. angry when I read crap by “Johny Evidence” Ioannidis who still doesn’t get multiplicative processes w/α<1 need to be cut in the egg. This is the city where I’ve resided ~2/3 of my life. So far 75% of the people dying are dying of COVID, not counting future morbidity. Permalink 4:01 PM – 6 May 2020

@nntaleb Traduttore Traditore! Dumas in Cte de Montecristo: “condemned for 5 m to Italian cuisine, one of the WORST in the world”. While waiting for the mailed hard copy, was trying to read it online in Italian: “una delle piu MEDIOCRI cucine del mondo” #Cheating but Italian >> French Permalink 3:23 PM – 6 May 2020

@trishankkarthik This is why we need more people to get the #RWRI mindset @nntaleb @financequant U.S. military busy spending trillions on offense rather than than worrying about practical risks like this virus that will easily throw them off in the homeland Permalink 3:15 PM – 6 May 2020

@nntaleb Resist The Wuhan Lab & other theories Just as victims of paranoia can find a narrative that impeccably matches all facts, people collectively fall prey to these shared delusions. “Intelligent” people can be more vulnerable Remember the Iraq WMDs or IYIs on Trump #TheBlackSwan Permalink 1:27 PM – 6 May 2020

@nntaleb Mr Meng, It’s the naive hedging strategies that lead to underfunding. Not the effective ones. Just a quick reminder. (Mr Meng is Chief Investment Officer of CalPERS)   Permalink 1:19 PM – 6 May 2020

@nntaleb 1) I don’t write for magazines (except short comment every 5-7 years) 2) @Reason is penetrated by exMonsanto shills/corporate interests 3) Intellectual caliber is low, dominated by sub-naive empiricists 4) I have many more readers than @Reason Ideas here:   Permalink 12:13 PM – 6 May 2020

@viziandrei “Contrary to orthodox belief, success is not being on top of a hierarchy. Success is standing outside all hierarchies.” — @nntaleb Permalink 10:58 AM – 6 May 2020

@nntaleb We need to figure out which “libertarians” are really localists without the right language, and get them on board. #localism   Permalink 9:15 AM – 6 May 2020

@nntaleb So far (stopping because there is no rain) Permalink 5:17 AM – 6 May 2020

@nntaleb (As usual please do not pollute the math threads with nonmath comments. I had to block a few people to clean up the thread. Thank you for your understanding.) Permalink 4:53 AM – 6 May 2020

@nntaleb In case it rains today Permalink 4:23 AM – 6 May 2020

@nntaleb Indeed, this is the essence of #localism!   Permalink 3:50 AM – 6 May 2020

@nntaleb I read Spencer’s stuff as I started learning about genetics.   Permalink 4:17 PM – 5 May 2020

@nntaleb Details Permalink 3:48 PM – 5 May 2020

@nntaleb 4) “Libertarians” are also incoherent: they deny stores the right to require masks & constrain their freedom yet ask for freedom… Nothing to do with libertarianism: rather a collection of marshmallowbrained psychopaths and misfits taking their hatred of humanity too far. Permalink 12:39 PM – 5 May 2020

@nntaleb Here @SrinivasR1729 Permalink 12:20 PM – 5 May 2020

@nntaleb Other than Permalink 12:12 PM – 5 May 2020

@nntaleb Afternoon workout   Permalink 11:57 AM – 5 May 2020

@nntaleb I’ve been fooled by individuals. Never by ideas. #Libertarians #Psychologists Permalink 10:06 AM – 5 May 2020

@nntaleb So Dr Faust, MD & MS, plus some Harvard thingy, is proposing a FAUSTIAN bargain that he does not understand. Permalink 7:53 AM – 5 May 2020

@nntaleb It is the same first order pseudo-libertarianism that asked to remove airport security checks on grounds that there was no terrorists on planes anymore. Permalink 5:43 AM – 5 May 2020

@nntaleb This dangerous imbecile is attributing job losses to deaths, as if it were govnts (not the virus) who caused the losses , & as if measures did not reduce fatalities (cockpit locked door paradox in #TheBlackSwan). Aside from the odious approach to a “trade-off”. Shameful & stupid.   Permalink 5:20 AM – 5 May 2020

@nntaleb 3) “LIBERTARIAN” is meaningless a designation if you live under silver rules and laws. Localism is the only way to make what is called LIBERTARIANISM stand on its feet. Permalink 4:27 AM – 5 May 2020

@Jaffer22915438 This is fantastic! In language that I can even understand.   Permalink 4:15 AM – 5 May 2020

@nntaleb 2) PRINCIPIA POLITICA shows the effects of scale/localism. Systemic harm has no tort laws (you can’t sue a virus) so you MUST use the Precautionary Principle. Many libertarians are just cranks & sociopaths.   Permalink 4:04 AM – 5 May 2020

@nntaleb Being flooded by first-order (scale-blind) “libertarians” (of the no masks, “freedom” to infect others variety), arguing that reactions to the virus (but not the virus) will cause hunger & famine. Since when have these selfish sociopathic “libertarians” been concerned w/famine? Permalink 3:53 AM – 5 May 2020

@Alvarus_lat Ne tituli legi possint apud Zoom   Permalink 5:02 AM – 4 May 2020

@bessbell Send this thread to any idiot fucker who posts an Instagram at the beach or a crowded park. Tell them my dad says see you later. Permalink 3:25 PM – 3 May 2020

@nntaleb Why you don’t manage tails using an “average” or a “forecast” but how much uncertainty there is in the system. My derivations Permalink 2:46 PM – 3 May 2020

@nntaleb My point summarized by an engineer, someone in the real world.   Permalink 2:38 PM – 3 May 2020

@nntaleb The thrill of writing when you do it ON YOUR OWN TERMS. Stop the minute it requires the smallest effort. Painters are said to enjoy painting, writers “having written”. Painters are free & ~all writers write on someone else’s terms. I don’t write reports, emails >240 ch, etc.   Permalink 1:56 PM – 3 May 2020

@nntaleb Here is a simple detail   Permalink 9:03 AM – 3 May 2020

@nntaleb There is ZERO rigor with Ioannidis. ZERO probabilistic reasoning & risk management rigor. He doesn’t even known what an exponential means. ZERO.   via @wired Permalink 8:34 AM – 3 May 2020

@nntaleb Like the spaghetti-minded Phil-the-rat @Ptetlock, there are still some pple around who are not getting skin in the game. To repeat: it is not just an incentive-disincentive problem but a FILTER –a filtering mechanism that helps remove harmful idiots.   Permalink 5:18 AM – 3 May 2020

@nntaleb Excellent idea. You want freedom to infect others; now pay for it. None of the people in parks enjoying their “freedom” should have any priority over and displace other sick people in hospitals.   Permalink 4:59 AM – 3 May 2020

@nntaleb 3) The pisteuo pbm is the reason first-order atheists a la Dawkins & religious people talk past one another: simply religious beliefs never claimed to be epistemic that is, belief in the scientific sense. You need to remove verbalism & labels to understand what something means. Permalink 4:44 AM – 3 May 2020

@nntaleb 2/ In Semitic lang., “Amen” means “trust”, not epistemic belief, so professions of faith state trust. The Syriac credo is “mhayminan 7ad aloho” = “WE TRUST only one god”. (not “I” since; is no Nicene creed for non Greek-Orthodox/Cath) Doxa in Christian Aramaic/Syriac is tshba7. Permalink 4:39 AM – 3 May 2020

@nntaleb This is the “pisteuo” Πιστεύο pblm. Credere does not mean epistemic belief, but trust, which I defined as “pisteic”, a kind of doxastic committment . From the Nicene credo: “Πιστεύομεν εἰς ἕνα Θεὸν” In Engligh, “belief” ~beloved. Note: δόξα = belief, gift, & glorification.   Permalink 4:07 AM – 3 May 2020

@morethanmySLE WATCH: Frontline health care workers in North Carolina stand-down protesters. This is AMAZING. BRAVE. And SAD that as hard as they have worked to SAVE lives, they have to CONVINCE people to stay home to protect these protesters from spreading #COVID__19 Permalink 9:11 PM – 2 May 2020

@nntaleb Used the same chalk for this and weightlifting (the bar is next to the board). Punishment for distraction while lifting: injury. Mild, but serious punishment. Permalink 9:32 AM – 2 May 2020

@ektrit Risk vs Ruin are two different things. From Skin in the game by @nntaleb Permalink 6:29 AM – 2 May 2020

@ektrit Risks involving tail risk, meaning risk which can cause collapse, must be avoided at any cost. From Skin in the game by @nntaleb Permalink 6:15 AM – 2 May 2020

@nntaleb MATH DU JOUR Stumbled upon an inequality but can’t prove it formally yet. Can’t find it in the literature. I’ts a generalization of x y/(x+y)^2<= 1/4 (Non math commentators & trolls will be blocked) Permalink 5:47 PM – 1 May 2020

@nntaleb 2/ It is like an inverse problem vs problem. If you reverse engineer a dish based on ingredients you have at home, rather than decide on a given dish, for which the restaurant must carry at all times ALL ingredients (with no leeway), the mechanism is vastly more efficient. Permalink 5:58 AM – 1 May 2020

@nntaleb Deux poids, deux mesures?   Permalink 5:51 AM – 1 May 2020

@nntaleb QUESTION Given that 1) people stopped going to restaurants, 2) they kept eating, & 3) farmers are dumping produce, dairy, meat owing to a surplus nobody wants, could it be that restaurants, (because of their need to maintain variety & excess quantities) waste a looot of food? Permalink 5:39 AM – 1 May 2020

@JensWilhelm2 @nntaleb this is the best explanation of your 2 people-2 filters theory up to now!   Permalink 12:20 AM – 1 May 2020

@nntaleb As expected, the Texas sharpshooting style ex post change of initial target. Now let’s look at the implications.   Permalink 6:49 PM – 30 Apr 2020

@nntaleb 2/2 Weightlifting Discussion du jour: Clean-Press Part 2: which one is safer/easier for heavy weights, + Power clean + Muscle clean PS- Thanks Maestro Grant @GrantSSC for answers to 1). Permalink 2:23 PM – 30 Apr 2020

@nntaleb Weightlifting Discussion du jour: Clean-Press If *x* is the weight that you can press from a rack for 5 reps, how many reps should you be able to do if you clean the bar first, for the exact same weight *x*. 5? 3? 2? cc:@GrantSSC Permalink 1:36 PM – 30 Apr 2020

@nntaleb We don’t see counts of morbidities from Covid. Reports seem focused on deaths. We need more rigorous accounts/estimates of damage to lungs, brains, heart, repro system,etc., ACROSS age groups. We have no clear idea if “permanent” but can see the risks from earliest infections. Permalink 12:26 PM – 30 Apr 2020

@nntaleb The problem in the US is that proportion of overweight (or, to be polite, “exceedingly well fed”) & metabolically challenged pple; the chief vulnerability for Covid. That makes any comparison or mortality rates between the US and Europe unrigorous. Permalink 7:30 AM – 30 Apr 2020

@nntaleb Bingo! You never congratulate anyone for winning at the Russian roulette.   Permalink 7:22 AM – 30 Apr 2020

@nntaleb DYNAMIC vs STATIC While the wisdom of a tail-risk decision under asymmetries is not to be decided after, comparative numbers for Sweden are much worse. Sweden’s numbers are growing at ~50-150 a day, Norway’s 1-5. So expect the ratios to soon be 4000-6000 vs 220-250 for Norway.   Permalink 6:58 AM – 30 Apr 2020

@nntaleb Looks like this is coming out in a genetics journal (as part of a larger study). Finally introduced rigor in the measurement of Genetic distances. Correlation/Covariance do not reflect distances, ENTROPY does.   ” target=”_blank”>″> Permalink 6:43 PM – 29 Apr 2020

@nntaleb Tweets like that made me discover @justinamash. He seems to be a threat. Much more on that, later.   Permalink 6:37 PM – 29 Apr 2020

@nntaleb Interesting. Alberta Investment Management Corp blew up EXACTLY in the way described in Chapter 3, “better convex than right”.   Permalink 12:47 PM – 29 Apr 2020

@nntaleb Actually, started already. Permalink 10:53 AM – 29 Apr 2020

@nntaleb Free America now… from psychopaths! Permalink 6:14 AM – 29 Apr 2020

@nntaleb Underestimation of deaths from COVID. This is an interesting demonstration of the difference between thin/fat tails. NonCovid deaths follow a thin-tailed distribution w/Chernoff bounds & v. low variance. So it is v easy to extract the near exact difference. #StatMethodology Permalink 4:04 AM – 29 Apr 2020

@mikeandallie 1/2 I’ve been meaning to get to this paper for a few days but only found the time tonight. As usual Nassim gets to the point right away and the result presented in the introduction is fascinating – see paper below for full details and the next tweet for the result in the intro.   Permalink 4:08 PM – 28 Apr 2020

@normonics fucking idiot.   Permalink 2:10 PM – 28 Apr 2020

@nntaleb Conditions for PHASE 1 reopening: + Mandatory masks in public + Tests + No superspreaders: subways, urologists conferences, etc. + Monitoring of passengers + Economists & psychologists stay locked-up at in permanent quarantine. Basically what we should have done in late January. Permalink 1:00 PM – 28 Apr 2020

@dottorpax Un mio lavoro con @nntaleb sul rischio di coda delle pandemie uscirà nei prossimi giorni su Nature Physics. Sarà accessibile a tutti, e posterò presto il link qui sotto. Il messaggio? Meglio non scherzare con certe cose, evitando i modellini giocattolo che si vedono in giro. Permalink 11:39 AM – 28 Apr 2020

@nntaleb Removal of skin in the game.   Permalink 10:37 AM – 28 Apr 2020

@nntaleb Tarde velle nolenlis est, Governor Cuomo. Permalink 9:42 AM – 28 Apr 2020

@nntaleb “Wishes”. Andrew Cuomo “whishes he blew the bugle on the virus in January. cc: @normonics @yaneerbaryam Permalink 8:49 AM – 28 Apr 2020

@stevesong Need to apply @nntaleb’s rule. Any corporation receiving a bailout should have executive remuneration adjusted to match that of a senior gov’t bureaucrat.   Permalink 5:47 AM – 28 Apr 2020

@nntaleb This is the first step in the dismantlement of citation rings.   Permalink 5:25 AM – 28 Apr 2020

@renegruner1 When you haven`t heard of NNT. @nntaleb #COVID19 Permalink 5:04 AM – 28 Apr 2020

@nntaleb Universities: If this continues, expect tenured faculty to get serious pay cuts & to finally have to justify their existence & the USEFULNESS of their so-called “research”. Permalink 5:16 PM – 27 Apr 2020

@nntaleb There is this illusion that the economy is harmed by the reaction to the virus rather than by the virus. In fact, if anything, it is harmed by the lack of EARLY reaction to the virus. Permalink 8:54 AM – 27 Apr 2020

@nntaleb Stop the bullshit. Sweden did HORRIBLE compared to Norway Denmark Finland. Japan is an easily closed Island. Use comparable levels of connectedness. Permalink 8:28 AM – 27 Apr 2020

@nntaleb BS spotting du jour. Throughout history, we’ve ben quarantining “healthy” and “unhealthy” people. For the very reason that we only know ex post whether they are healthy or not.   Permalink 8:12 AM – 27 Apr 2020

@nntaleb This was (before my weight loss) a conversation with @Confusezeus at the Fletcher School of Diplomacy in 2015. @MilenaRodban who was in the audience was told that the faculty (political science empty suits) complained that “it was not academic”.   Permalink 6:28 PM – 26 Apr 2020

@nntaleb Thread on errors in growth of pandemics   Permalink 6:17 PM – 26 Apr 2020

@nntaleb A reasoning mistake by Johnny Evidence   Permalink 6:15 PM – 26 Apr 2020

@nntaleb Never tell people something if they know if already and they know that you know that they know it. Permalink 10:26 AM – 26 Apr 2020

@MasaSkiba Some things never change. Permalink 8:33 AM – 26 Apr 2020

@nntaleb An interesting twist: until 1860, my ancestors specialized in shipping merchandise between the Ottoman Levant and Marseilles. Permalink 8:20 AM – 26 Apr 2020

@nntaleb How did the #Lindy crowd miss this?   Permalink 8:15 AM – 26 Apr 2020

@nntaleb “I love models,” he adds. “I do a lot of mathematical modeling myself.” No you don’t, “Johny evidence” Ioannidis. Science” is not about asymmetry in decisions: we didn’t wait for scientific evidence to know not to jump from a cliff.   via @WSJ Permalink 5:40 PM – 25 Apr 2020

@nntaleb Of course psychologists and pseudoempiricists are the first to promote danger. They were the ones who said Jan 26 that worrying about the virus was paranoia, cost us trillions so far. They don’t get multiplicative risk. Here is Phil the rat @PTetlock   Permalink 4:02 PM – 25 Apr 2020

@nntaleb These imbeciles really want to subject us to another virus. Why is why genetic modification of things that MULTIPLY fall under the (nonnaive) precautionary principle. Recall Mao’s policy to eliminate sparrows caused 50 mil to die of famine. #UnintendedConsequences   Permalink 3:18 PM – 25 Apr 2020

@nntaleb And the converse: if X is Pareto then r is exponential (\alpha). cc:@DrCirillo Permalink 3:14 PM – 25 Apr 2020

@nntaleb Using a double exponential (Laplace) we get a power law to the right (naturally not the the left) Permalink 3:06 PM – 25 Apr 2020

@nntaleb Note you can use a double exponential (Laplace) Permalink 2:42 PM – 25 Apr 2020

Ioannidis, Tetlock, Summers, Masks, Oil, Russian Roulette, Astrology

From the Convexity of Masks to No-Convexity Ben | Youtube
Published on Apr 24, 2020
+ Why the crisiss was not a Black Swan.
+ Masks compound (even if primitive)
+ Convexity Ben misleads with his “hedges”

Tail Risk of Contagious Diseases (pdf 4/18/2020)

(Anti)Fragility and Convex Responses in Medicine (pdf 7/31/2018)

The Pandemic Isn’t a Black Swan but a Portent of a More Fragile Global System | NewYorker

As Taleb told me, “The great danger has always been too much connectivity.” Proliferating global networks, both physical and virtual, inevitably incorporate more fat-tail risks into a more interdependent and “fragile” system: not only risks such as pathogens but also computer viruses, or the hacking of information networks, or reckless budgetary management by financial institutions or state governments, or spectacular acts of terror. Any negative event along these lines can create a rolling, widening collapse—a true black swan—in the same way that the failure of a single transformer can collapse an electricity grid.

Taleb: The Only Man Who Has A Clue | NakedCapitalism

Tutorial: Simple trick to see the effect of power laws | Youtube
Published on Apr 19, 2020
A simple tutorial explaining how, in the presence of power laws (with low exponent) most of the body of the distribution becomes noise.
Once you establish that a variable is in the power law class, some necessary consequences come out.
To debunk that history is dominated by tail events, you must show it does not follow a power law.

@nntaleb So we can infer that the rate of growth is NOT Gaussian, must be in the borderline subexponential class. r can be negative of course. Permalink 12:54 PM – 25 Apr 2020

@nntaleb Voila Permalink 12:42 PM – 25 Apr 2020

@nntaleb Math Du Jour: What is the Distribution of Pandemics if the rate of growth follows an exponential distribution with mean 1/\lambda? Explains very simply the result with @DrCirillo Permalink 12:38 PM – 25 Apr 2020

@nntaleb This is the kind of crap dichotomy you hear, as if 1) letting the virus run wild would not kill the economy 2) It is the government that is closing the economy, not pple A segment of libertarians/conservatives have a reasoning defect as they think in binary & static labels.   Permalink 8:41 AM – 25 Apr 2020

@nntaleb So far, by substitution Permalink 8:24 AM – 25 Apr 2020

@nntaleb This is a mathematical problem, only for those into math. I block cute comments that are not helpful & distract the readers. Permalink 7:42 AM – 25 Apr 2020

@nntaleb Quarantine workout Permalink 6:51 AM – 25 Apr 2020

@nntaleb Larry Summers, advisor? Aside from his hideous track record, Summers was fiercely AGAINST putting skin in the game of decision makers. He even managed to transform my claim that it was “necessary” into “sufficient” & argued on that basis.   Permalink 4:51 AM – 25 Apr 2020

@nntaleb Foreseen by @barabasi   Permalink 2:35 AM – 25 Apr 2020

@urcum62 Angela Merkel truly understands the Covid dynamics and the Math behind it. She also understands the diffucilties associated with low probabilities. #AngelaMerkel   Permalink 5:37 PM – 24 Apr 2020

@nntaleb Looks like the govmt is hiring Kroll to investigate #RiadPonzi’s books. Kroll specializes in FRAUD, tracking transfers, etc. Permalink 12:29 PM – 24 Apr 2020

@nntaleb Add this to the list   Permalink 10:22 AM – 24 Apr 2020

@nntaleb Lebanon: #RiadPonzi Salameh is the most destructive central banker in history. He managed to stick to power for ~30 y through 10 governmnets. He is now trying to make it political. No, it is not because Hezb hates him that he is suddenly competent, honest, & principled. #Lebanon Permalink 10:11 AM – 24 Apr 2020

@nntaleb From the Convexity of Masks to Convexity Ben   via @YouTube Permalink 8:23 AM – 24 Apr 2020

@nntaleb|twitter&par=sharebar   Permalink 7:39 AM – 24 Apr 2020

@nntaleb The point is not whether it works or not (it may); it is just irresponsible to gamble with citizens under such opacity.   Permalink 6:53 AM – 24 Apr 2020

@hjluks Sarcopenia should be a four-lettered word … If you’re over 40 it’s happening as you read this :-( . So much badness comes from a lack of muscle mass. So much goodness comes from improving your muscle mass.   Permalink 6:32 AM – 24 Apr 2020

@Monsantobuster Best summary, Prof @nntaleb   Permalink 3:06 AM – 24 Apr 2020

@vibinbaburajan [Thread] Nassim Taleb’s 17 best one-line wisdom. @nntalebbot @nntaleb @TalebWisdom 1. The three most harmful addictions are heroin, carbohydrates, and a monthly salary. Permalink 2:24 AM – 24 Apr 2020

@nntaleb Chi mangia solo, muore solo.   Permalink 5:40 PM – 23 Apr 2020

@DavidSalazarVir Trying to get my head around fat-tails by studying @nntaleb’s latest technical book. Replicated some plots in #rstats #tidyverse   ” target=”_blank”>”> Permalink 12:41 PM – 23 Apr 2020

@nntaleb I was expecting the #Lindy activists to dig out mask-wearing practices in history. For instance, the Tuareg berber tribes: men wore masks. Permalink 10:53 AM – 23 Apr 2020

@nntaleb Emanuel Derman (who knows something about probability) exposing the dangerous BS by Phil the Rat @PTetlock –whose knowledge of probability is way too primitive.   Permalink 9:26 AM – 23 Apr 2020

@nntaleb Paper with @DrCirillo “Tail Risk of Contagious Diseases” using Extreme Value Theory. Advice by non EVT-trained epidemiologists concerning COVID-19th tail risks is no different from advice by a carpenter concerning complex odds at roulette tables.   ” target=”_blank”>”> Permalink 9:20 AM – 23 Apr 2020

@nntaleb From my dispute w/ #NoConvexityBen Meng from CALPERS (currently) largest fund on planet PRINCIPLE: Thou Shalt Not compare convex payoffs (w/ tiny downside) to linear ones (w/yuuge downside). More Basic: Thou Shalt Not Call speculative trades “hedges”.   Permalink 5:04 AM – 23 Apr 2020

@nntaleb The safest policy is to act as if we had NO idea about the consequences of this.   Permalink 2:41 PM – 22 Apr 2020

@nntaleb People are interested in masks & testing. Not in geopolitics (except on the weekend). Not in spending trillions on nuclear weapons when we can’t even get N95 masks.   Permalink 10:59 AM – 22 Apr 2020

@nntaleb   Permalink 10:34 AM – 22 Apr 2020

@nntaleb Gambling by governments is irresponsible, even if the result turns out to be favorable. Permalink 10:25 AM – 22 Apr 2020

@nntaleb Our security = testing incoming passengers at JFK, not where trillions were spent: building yuuuge capabilities against very weak nations. Where are the tests? Where are the masks? Spending trillions (literally) because governments don’t understand the real sources of risk.   Permalink 8:41 AM – 22 Apr 2020

@nntaleb Paulina N is correct to emphasize the death toll. But it will be much higher as you must integrate future deaths at rate. Also missing morbidity: % of survivors end up with permanent lung & other damage. Finally, even if Sw ends up ahead (it won’t), the move is not responsible.   Permalink 7:33 AM – 22 Apr 2020

@nntaleb Reduced connectivity Masks Culturally, precaution is respected   Permalink 4:29 AM – 22 Apr 2020

@nntaleb Bachelier was right.   ” target=”_blank”>″> Permalink 4:23 AM – 22 Apr 2020

@nntaleb New hobby thanks to lockdown: Olympic lifts   Permalink 3:17 AM – 22 Apr 2020

@TalebWisdom Here is one of my favorite @nntaleb quotes: “Don’t cross a river if it is four feet deep on average.” Permalink 1:37 AM – 22 Apr 2020

@nntaleb Joe is good. Very good. Should we start calling him “Sherlock Shipman”?   Permalink 3:39 PM – 21 Apr 2020

@nntaleb LINDY Quarantine & restriction of mobility are Lindy; they are present in the old testament & in Islam: “If you’re away, & disease breaks out, you stay there. If home, you stay home.”   Permalink 2:19 PM – 21 Apr 2020

@DrAmithaMD Waited for this… such a good analysis on whether #COVID19 was a rare event (it was, but we ignored the signs). “The Pandemic Isn’t a Black Swan but a Portent of a More Fragile Global System” @nntaleb   via @NewYorker @bavishai Permalink 12:09 PM – 21 Apr 2020

@joe_shipman STATISTICAL INFERENCE PUZZLE @nntaleb Is “2 false positives in 401 trials” consistent with “50 false positives in 3300 trials”? What is a good null hypothesis, and what is the p-value? Permalink 8:05 AM – 21 Apr 2020

@nntaleb Actually slight modification to the great results by “Johnny evidence” Ioannidis. You don’t need Jensen to prove the inequality Permalink 6:51 AM – 21 Apr 2020

@nntaleb The Trump Administration is suspending immigration owing to the Corovirus pandemic after discovering the interesting epidemiological property that (documented) immigrants are highly infectious, but tourists & business visitors are not. Permalink 6:48 AM – 21 Apr 2020

@nntaleb Another grave error in the “Johnny evidence” Ioannidis & friends paper, not too dissimilar to Simpson’s paradox, (also spotted by @gian_rinaldi, private communication): They don’t get the convexity of divisions. If a result doesn’t make sense & comes from nerds, it is wrong.   ” target=”_blank”>”> Permalink 4:37 AM – 21 Apr 2020

@ishirubi Ok I can go rest in peace now: Permalink 3:43 PM – 20 Apr 2020

@nntaleb 3) This is from Dynamic Hedging (1997), with a discussion of fungibility and first deliverable contract. Permalink 12:43 PM – 20 Apr 2020

@nntaleb 2/ Oil: The basis is out of whack because of storage. It is like being stuck in traffic in a Bentley, and no possibility of leaving it so you need to pay someone to take it from you. Permalink 12:30 PM – 20 Apr 2020

@paulanawfal من كم شهر رحت لأحضر ندوة ل @nntaleb بالجامعة اليسوعية وما كان في وسعى مبارح حضرت الإعادة وهيدا المقطع هو المفضل الي بالندوة #RamsusRiad Permalink 12:02 PM – 20 Apr 2020

@nntaleb Every #RWRI we discuss the situation how *oil above ground* (hence the front oil future) can sqeeze suckers and have a negative value because it can be impossible to store during a glut and impossible to abandon because of EPA. Negative optionality from liability.   Permalink 11:56 AM – 20 Apr 2020

@black_swan_man #blackswanman #theblackswanman #protectyourpension #CalPERS #tailrisk #tailhedge   ” target=”_blank”>″> Permalink 9:51 AM – 20 Apr 2020

@nntaleb 2015: When people ask me to talk about RISK, I talk about epidemics. Not ISIS, not journalistic BS. [I lost weight and increased by Max DL by 100 lbs since]   via @YouTube Permalink 9:08 AM – 20 Apr 2020

@nntaleb Sorry, I meant he doesn’t get that car accidents are not multiplicative. IOANNIDIS: Here we have someone doing probability & lecturing people on probability errors who like this ignorant Phil the rat Tetlock @PTetlock has never heard of Chernoff bounds. Permalink 7:54 AM – 20 Apr 2020

@nntaleb John Ioannidis, in his argumentation, reasoning, and demeanor reminds me of what we call “a pre-blown up trader”. He doesn’t get (among other things) that driving 9 to 415 miles is not multiplicative and CONTAGIOUS.   Permalink 7:47 AM – 20 Apr 2020

@nntaleb This is a statistical signal abt HQN to ADDRESS even if Zelenko, like Raoult, doesn’t look like Dr. Could be: samples of large “anecdotes” are biased, or NY & Marseilles hide the dead. Note that the media DOES NOT require a double blind for Gilead. Explain the dual standards.   Permalink 4:49 AM – 20 Apr 2020

@balajis Just-the-flu journalists failed across the board. That includes Fox, and the NYT reporter now denouncing Fox. Permalink 3:16 PM – 19 Apr 2020

@nntaleb Compare the richest countries, such as Sweden, making a “tradoff” (which is not even a tradeoff anyway) compared to much poorer places in the East Med, India, or China that wouldn’t even remotely consider a Faustian bargain. Shame. Wealth brings moral degeneracy. Permalink 2:25 PM – 19 Apr 2020

@nntaleb GERONTICIDE is the sign of moral decay. Indian official explained only “rich” countries make a tradeoff betw lives & “economy” (assuming they are separable). The argument of “lockdown costing lives” is bunk: in the poor country, India, ~nobody starved. The richer, the worse!!! Permalink 1:30 PM – 19 Apr 2020

@nntaleb People are starting to understand stuff. It took a pandemic for that. I never never dreamed that my Russian Roulette argument would be expressed by those against whom I have used it over the past 2 decades. Permalink 10:57 AM – 19 Apr 2020

@nntaleb A simple tutorial explaining how, in the presence of power laws (with low exponent) most of the body of the distribution is NOISE.   Permalink 10:04 AM – 19 Apr 2020

@nntaleb Paper with @DrCirillo on the Tail Risk of Contagious Diseases. Explains our attitude towards the disease; why epidemiological models are largely NOISE.   Permalink 8:01 AM – 19 Apr 2020

@nntaleb Rats will also be liars. “Phil the rat” @PTetlock is misrepresenting the reason I call him a rat. It is for spending years trying to publicly discredit our concern for tail payoff, ergodicity w/o a slightest clue abt the statistical implication of power laws, even probability. Permalink 7:06 AM – 19 Apr 2020

@nntaleb Solution. This friend of mine found the trick. If there is (cc) on Youtube you can see both the subtitles in the original language and the transcript in English. Permalink 4:19 AM – 19 Apr 2020

@nntaleb Add: the IYI was wrong on masks, mobility, multiplicative risks, etc.   Permalink 4:02 AM – 19 Apr 2020

@nntaleb Alternative explanations are 1) ouzo (what we call in the Levant “the milk of lions”), 2) Orthodoxy: Unlike Spain, Greece celebrates Easter on the correct calendar, 3) Greek coffee (a.k.a. Turkish). Otherwise quite convincing.   Permalink 3:20 AM – 19 Apr 2020

@SrinivasR1729 Go down deep enough into anything and you will find mathematics. Permalink 12:12 AM – 19 Apr 2020

@nntaleb Permalink 4:56 PM – 18 Apr 2020

@nntaleb Learned to cook linguini with squid ink. Who needs restaurants when you have 1) internet access, 2) good olive oil, 3) really fresh garlic & parsley, 4) fresh tomatoes, 5) good white wine, 6) salt, etc. Permalink 4:53 PM – 18 Apr 2020

@yaneerbaryam Currently people testing positive (or presumptive positive) are sent home to infect their families. Where is the outrage? There should be other options so that families will be safe. Every community, state and country, should have a “Safe Family” program. Permalink 4:23 PM – 18 Apr 2020

@nntaleb Friends, this friend of mine wants to watch a Greek movie with both Greek and English subtitles. Netflix can do it in other languages, not Greek (he is based in the US). Is there a way to do it? Permalink 3:55 PM – 18 Apr 2020

@nntaleb Χριστός Ανέστη ! Permalink 11:11 AM – 18 Apr 2020

@artemon Seems like a great case of absence of evidence being treated like evidence of absence, plus violating the precautionary principle. Thank you @nntaleb for teaching me to see these clearly.   Permalink 10:35 AM – 18 Apr 2020

@nntaleb Nobody realized that for Lebanon, Greece, Cyprus, & Marseilles, the real reason of the low rate of Corona infections/fatalities is the arak/ouzo/pastis. Experiments show you need to drink it during & before every meal for it to be effective. And try the purest you can find. Permalink 8:48 AM – 18 Apr 2020

@nntaleb Bravo #Lebanon. Early paranoia pays! Permalink 4:47 AM – 18 Apr 2020

@nntaleb What is behind, among others, the moniker “Phil the rat” @PTetlock.   Permalink 4:39 AM – 18 Apr 2020

@TalebWisdom “The intellectshual world is populated by a collection of people who are much better at explaining than understanding.” – Nassim Taleb Permalink 4:19 AM – 18 Apr 2020

@berndschiffer And also @nntaleb ‘s “new kind of ingratitude” comes to mind. “Who is more valuable, the politician who avoids a war or the one who starts a new one (and is lucky enough to win)?” #COVID19Aus #COVID Permalink 3:11 AM – 18 Apr 2020

@uair01 Nice picture of extremistan versus mediocristan mortality and why ” Covid is different: @nntaleb @trishankkarthik   Permalink 7:40 AM – 17 Apr 2020

@stevenstrogatz Yes, @nntaleb practices what he preaches. On the day we met, he walked me around New York for seven hours and enjoyed a plate of pasta with squid ink.   ” target=”_blank”>”> Permalink 6:28 AM – 17 Apr 2020

@nntaleb Drowning in swimming pools is extremely contagious and multiplicative.   Permalink 4:19 AM – 17 Apr 2020

@nntaleb HITS THE SPOT: “What is happening right now is not because all the epidemiologists & virologists around the world are wrong, but because they’re asked to make decisons and construct models about something they don’t know nearly enough about.”   Permalink 5:23 PM – 16 Apr 2020

@nntaleb OK, OK. Thanks @yvessmith   Permalink 11:57 AM – 16 Apr 2020

@nntaleb PHILOLOGY DU JOUR Question: In Judeo-Arabic Baghdad seems to be spelled בגדד not בעדד(with a gimmel not a ghayn) (unlike more historical غزة-> עזה or Gomorrah עֲמֹרָה not גמֹרָה from transliteration Γομορραν) (pharyngeal [ʕ] not epiglottal [ʢ.) When was the غ lost in Hebrew? Permalink 10:50 AM – 16 Apr 2020

@nntaleb Why you cannot use epidemiological models with point estimates when variables are stochastic. An illustration. You end up with a crazy distribution of outcomes, get fooled. This is our problem with the UK “model”. Permalink 9:36 AM – 16 Apr 2020

@nntaleb This is potentially yuuuuge. Do not miss.   Permalink 10:30 AM – 14 Apr 2020

@nntaleb I don’t know if he (and those liking the graph) realize that an R-squared of .15 means, if you look at it generously, that almost all the variance is for random reasons, something like ~98% (conventional) or (entropy) >99.9%. @salilstatistics   Permalink 4:52 AM – 14 Apr 2020

@Jac5Connor Nassim asks an important question: Do masks cause earthquakes? I bet this is why the WHO took so long to recommend them.   Permalink 1:14 PM – 13 Apr 2020

@gernelle «Une catégorie de personnes ne cesse d’augmenter(…) plus douées pour expliquer que pour comprendre. Ou plus douées pour expliquer que pour faire.” ⁦@nntaleb⁩ cité par ⁦@sebastienlefol⁩ dans un édito percutant #covid ⁦@LePoint⁩   Permalink 11:40 AM – 13 Apr 2020

@nntaleb Just explained in a lecture that risk management and “science” are not the same thing. Risk is about asymmetries. With .1% error rate, few flight attendants would be alive. Permalink 7:14 AM – 13 Apr 2020

@nntaleb Do not conflate doing science and being nice and polite to scientists. Permalink 3:54 AM – 13 Apr 2020

@nntaleb Friends, another robust question to get the convexity. How many people contracted COVID while wearing surgical masks? How many w/N95? How many with cowboy scarves? (Assume for now homogeneity. We are looking for convexity, not measurement). Permalink 7:13 PM – 12 Apr 2020

@nntaleb We have a hint: @dzviovich just sent me something useful: comparison of US vs CZ w/a single sign. difference: edict to wear maks. We know masks work (from other combined statistical signals). Now let’s back up the convexity of probability of infection to particle concentration. Permalink 7:06 PM – 12 Apr 2020

@nntaleb We need to get the probability of getting sick at different concentration of droplets. We could probably back it up (or get a handle on the convexity) from country data (Czech republic). Intuition: reduction of 70% of particles is yuuuge: home masks should work. Plus if 2-way! Permalink 6:53 PM – 12 Apr 2020

@nntaleb There is something about “ceteris paribus” (everything else being constant) for a marginal property that commentators are not getting. Permalink 5:36 PM – 12 Apr 2020

@spwells An excerpt from my interview with @VanceCrowe discussing why the Coronavirus pandemic isn’t a black swan event. @nntaleb   ” target=”_blank”>″> Permalink 5:26 PM – 12 Apr 2020

@nntaleb The answer is by @Physical_Prep which maps to the 2/3 scaling exponent found by Geoffrey West. It depends on your level of course as you can see.   Permalink 4:45 PM – 12 Apr 2020

@nntaleb WEIGHTLIFTING Friends, for every additional 10lbs of say deadlift how many additional pounds of muscle mass would be gained? Approximately of course. Permalink 3:07 PM – 12 Apr 2020

@nntaleb I’ve lost weight since.   Permalink 2:26 PM – 12 Apr 2020

@normonics John Conway lost to coronavirus. That is terrible news. Conway’s game of life is something I always show at #RWRI. NEVER fails to make the floating lightbulbs above everyone’s heads spark on. RIP   Permalink 1:54 PM – 12 Apr 2020

@nntaleb Happy Palm Sunday! And, to those on the non-Orthodox calendar, Happy Easter! Permalink 7:12 AM – 12 Apr 2020

@nntaleb That’s for an individual. If everyone wore *VERY BAD* masks, I guess the number of deaths would drop by a yuuuge factor, maybe 90%. Why? p is probability of infection, look at 1-p^n because everyone is reducing. For 2 pple masks act a 2-way filter, 1-p^2. Yuuge. Permalink 4:44 AM – 12 Apr 2020

@nntaleb The proof is in   ” target=”_blank”>”> Permalink 4:30 AM – 12 Apr 2020

@nntaleb MASKS One comment about masks and nonlinearities that these imbeciles are not getting. Reducing exposure to viruses by 30% thanks to an “imperfect” mask does not mean reducing risk of contracting the disease by just 30%. By convexity, it must be more than 30%, can even be 95%. Permalink 4:22 AM – 12 Apr 2020

@nntaleb Treading *absence of evidence* as *evidence of absence* is a form of overoptimization. Permalink 3:52 AM – 12 Apr 2020

@joe_shipman   This is an very evil article. It may not be apparent at first why I make such a serious charge. But I stand by it. It is viciously slanted with sophistical language and manipulative presentation, even though the truth can be discerned anyway. @nntaleb Permalink 7:21 PM – 11 Apr 2020

@nntaleb and… the NYT and science journos and ignorant “evidence based” epidemiologists who can’t read absence of evidence got us here. Don’t blame mayors who shut down cities, blame misinformation about masks and mobility. Blame the New York Times. Permalink 6:49 PM – 11 Apr 2020

@nntaleb It’s not the reaction that wrecked the economy. It’s the LACK of INITIAL reaction that wrecked the economy. Proper border controls on Jan 26, plus masks & tests & we’d be fine now. The @CDC, @WHO, UK Gov helped spread disinformation. After 3 m, still no masks & tests!!! Permalink 6:38 PM – 11 Apr 2020

@nntaleb Correction: Does Big Pharma own the media? Permalink 3:22 PM – 11 Apr 2020

@nntaleb Chloroquine: Does Big Pharma owns the media? + Studies are said to be “not rigorous” when it comes to Chloroquine in spite of robust statistical signal + Studies w/less rigor and significance are promoted when it comes to drugs by Gilead Note: Chl was OTC, costs 1 Euro a pack. Permalink 3:19 PM – 11 Apr 2020

@nntaleb Managed to sneak in 2 footnotes for my new book related to COVID before the printing starts.   ” target=”_blank”>”> Permalink 12:57 PM – 11 Apr 2020

@nntaleb The best therapy; lowers our anxiety and helps organize our minds while facing mild uncertainty. Aesthetic and harmless; unlike economics and social “science”. Discussed in #FooledbyRandomness   Permalink 11:34 AM – 11 Apr 2020

@birdxi1988 This is how @nntaleb @yaneerbaryam and @normonics ‘s Precautionary Principle destroys the evidence-based practices. In January, they specifically warned that the estimated R0 would be biased downwards. Guess what, CDC says that R0 appears to be 5.7 vs. 2.2-2.7 previously thought! Permalink 11:26 AM – 11 Apr 2020

@davidsarac What Nassim Nicholas Taleb is showing us by his persistent rudeness is that things one is ready to be rude about are worthy of understanding too In terms of evolutionary dynamics, it is a cry of the bird warning other birds predator is approaching Permalink 10:54 AM – 11 Apr 2020

@nntaleb More elegant. It is hard to live on a planet where the most cited person in epidemiology, John Ioannidis, doesn’t understand exponential, hence multiplication. Yet he tries to make policy. Permalink 8:57 AM – 11 Apr 2020

@nntaleb Wrong. Levantine coast had 5 additional Greek areas. Plus Berytus and Baalbeck spoke mainly Latin owing to Law school and Roman resettlements.   Permalink 7:43 AM – 11 Apr 2020

@nntaleb John Ioannidis does not get that model uncertainty WORSENS possible outcomes under exponential growth & should lead to MORE reaction. Dangerous ignorance. Here is a derivation from Jensen’s ineq. Permalink 7:26 AM – 11 Apr 2020

@pierrewaters Localism & mafia: news the @nntaleb crew will like:   Permalink 5:28 AM – 11 Apr 2020

@TalebWisdom “Some people are so foolish that they only get answers right when they misunderstand the question.” – Nassim Nicholas Taleb Permalink 5:18 AM – 11 Apr 2020

@mikeharrisNY Their logic and yours is wrong. Because doors sometimes fail to stop thieves, does it mean we should not have doors? Is this what is proposed? Can someone be so dump? Apparently, yes. Permalink 1:59 AM – 11 Apr 2020

@nntaleb Rightwing sociopathic quacks like @BjornLomborg: are ALWAYS on the wrong side of things precautionary, (including climate). Saying “no worse than the flu” was ignorant 3 months ago; saying it after data from the past few weeks is outright malfeasance. @Twitter blocks fakenews.   Permalink 4:02 PM – 10 Apr 2020

@nntaleb From @RupertRead: states that Precautionary Principle applies ONLY to specific multiplicative things/power law call with alpha<2 Beware misinformaiton by frauds such as the rat @PTetlock & shill @Dgardner making it look like undirected paranoia (Martians invading the planet). Permalink 12:15 PM – 10 Apr 2020

@nntaleb Very encouraging to see young Lebanese from all backgrounds attacking the shill #MarcelGhanem for making an antisemitic remark. Things have changed!   Permalink 11:53 AM – 10 Apr 2020

@yaneerbaryam Everyone must see!!!   Permalink 11:23 AM – 10 Apr 2020

@BrankoMilan Indeed, after every seasonal flu, NYC does mass graves… How can people write such easily contradicted things is beyond me to understand.   Permalink 10:42 AM – 10 Apr 2020

@nntaleb Many solutions, mostly @SrinivasR1729 This tidies the whole “ting”. Permalink 10:40 AM – 10 Apr 2020

@eassily Hah ! @nntaleb and @byzantinepower would appreciate this Permalink 6:10 AM – 10 Apr 2020

@nntaleb Weekend distraction. By @SrinivasR1729 Permalink 5:01 AM – 10 Apr 2020

@nntaleb The best part about this is that I can walk in the park without being asked for a selfie (or an autograph) by a graduate student in computer science at the local university.   Permalink 3:16 PM – 9 Apr 2020

@nntaleb Yes, office transmission is much much much more controlled than cross-geographical superspreaders.   Permalink 1:01 PM – 9 Apr 2020

@nntaleb Rest in Peace, real heroes. And criminal neglect by risk-blind “evidence based” bureaucrats. And, friends, in the meanwhile, wear a mask. Again, than you all the Dr Chowdhurys.   Permalink 11:09 AM – 9 Apr 2020

@nntaleb Serious business (weight trainining): Friends (@GrantSSC & others), how long, after a *true* 5RM or 1RM deadlift (meaning you can’t redo it right away), does it take to recover at 100% and redo it? 20 minutes? 4 hours? 3 days? Permalink 9:30 AM – 9 Apr 2020

@nntaleb Fat tails. Reduce superspreaders.   Permalink 9:01 AM – 9 Apr 2020

@cdipaola62 @Judgenap thoughts on prospect of class action lawsuits against hospitals/health systems? Will the nurse’s unions put pressure on in other ways? Interested in your opinion. @nntaleb @CalNurses @MassNurses   Permalink 5:25 AM – 9 Apr 2020

@nntaleb Most “evidence based” IYIs use statistical tools they don’t understand AND are deprived of the logical faculties of grandmothers, which explains the explosive blunders of @WHO, “science” journos, @CassSunstein, @R_Thaler, idiots like @PTetlock the rat, etc.   Permalink 5:09 AM – 9 Apr 2020

@nntaleb FAT TAIL PROPERTY 90-98% of the diffusion can be reduced by limiting superspreaders & forcing masks: + Subways/buses + Conferences (especially involving psychologists/behavioral economists) + Planes + Elevators + Bars with bad Negronis + Indoor restaurants/cafés Rest is normal.   Permalink 5:42 PM – 8 Apr 2020

@nntaleb Statistically, you should see much more of this. The system imposes some #Skininthegame: those who inflict risks on others are subjected themselves to the same risks. As with Boris. Sad.   via @nypost Permalink 1:45 PM – 8 Apr 2020

@mncube This is how @nntaleb trades   Permalink 11:17 AM – 8 Apr 2020

@nntaleb And Mr @david_perell if you need ancestry for my version of “skin in the game”, you don’t go up to Steve Jobs. Try harder and deeper into history: Hammurabi, >3750 years ago. Permalink 11:15 AM – 8 Apr 2020

@nntaleb Nice try, @david_perell He is using the term “skin in the game” as incentive not as risk asymmetry (be responsible for the harm you do). Try again.   Permalink 11:13 AM – 8 Apr 2020

@nntaleb PHILOLOGY DU JOUR February in Chr Aramaic is Shbat,ܫܒܳܛ, “blows” from ” רוח נשבת” (the wind blows, original Accadian Šabātu) hence “windy month”. (Others were ~Babylonian gods). Remarkably the French Revolution renamed “Ventôse” (windy month) the span from Feb ~19-March 19. Permalink 6:58 AM – 8 Apr 2020

@mikeandallie Adding to the prior retweet to say that Nassim’s 2019 paper linked below plus the recent work of @ole_b_peters and @alex_adamou on ergodicity economics have been hugely influential to me not just in thinking about option pricing, but thinking about long-dated risk generally.   Permalink 6:23 AM – 8 Apr 2020

@nntaleb You did not need recent events to get that the mean-variance based methods, along with RISK PARITY used in finance (by many funds) are a fraud. I explained the details in #TheBlackSwan See paper how we (my friends & I) price options under power laws.   ” target=”_blank”>”> Permalink 6:16 AM – 8 Apr 2020

@nntaleb In a hospital if you are dealing with patients. But in social life you don’t have the exposure and, critically, BOTH have masks.   Permalink 4:59 AM – 8 Apr 2020

@nntaleb Asymmetry. Never bail out without clawback.   Permalink 4:13 AM – 8 Apr 2020

@nntaleb I revealed it at the USJ lecture last November, from data from (among others) Toufic Gaspard (live on national TV). #RiadPonzi then launched a smear campaign.   Permalink 4:04 AM – 8 Apr 2020

@GMWatch Powerful condemnation of the UK govt’s failure to follow the #PrecautionaryPrinciple over #COVID19 — by UEA professor @RupertRead, who together with @nntaleb @yaneerbaryam @normonics & others, has for months repeatedly been demanding precautionary action to save lives.   Permalink 3:41 AM – 8 Apr 2020

@nntaleb 3)Other fallacy is by the *tradeoff idiots* who don’t get: a) even if governments did nothing, airplanes & restaurants would be bust by now as # pple are doing bottom-up quarantines b)hospitals would be overwhelmed c)millions of young sick (many w/permanent damage) d)+uncertainty Permalink 5:45 PM – 7 Apr 2020

@nntaleb 2) I meant don’t treat your parents the way you don’t want *your children* to treat you! Actually the “triage” (sacrificing the old) is a new European thing introduced in Italy; Roman society worshiped & protected the elders. Same with Eastern societies. (Senatus=Sheikh=elder). Permalink 5:17 PM – 7 Apr 2020

@nntaleb Aside from the pathetic modeling behind the “herd immunity”: it is morally repulsive. Civilization RESIDES in the enforcement of intergenerational golden (actuallly, silver rules): don’t treat your parents the way you don’t want them to treat you! From #SkinInTheGame #Incerto Permalink 5:11 PM – 7 Apr 2020

@spwells Spread of the Olive Tree in the Mediterranean Basin ⁦@PZalloua⁩ ⁦@nntaleb⁩   Permalink 11:25 AM – 7 Apr 2020

Sue, @WHO, NYT, LOCALISM, Chloroquine, Asymmetry, Masks, Branson, @CassSunstein, Superforecasters, De Blasio

The Corona Crisis is Not a Black Swan: Nassim Nicholas Taleb (Universa Inv. & NYU Tandon)

Corporate Socialism: The Government is Bailing Out Investors & Managers Not You
(With Mark Spitznagel)

Why should we spend taxpayer money to bailout companies who spent their cash (and often even borrowed to generate that cash) to buy their own stock (so the CEO gets optionality), instead of building a rainy day buffer? Such bailouts punish those who acted conservatively and harms them in the long run, favoring the fool and the rent-seeker.

Die Corona-Pandemie ist kein schwarzer Schwan: Warum 2020 nach Nassim Taleb nicht mit 2008 zu vergleichen ist


@nntaleb Flooded by journo/TV/podcts to talk abt #BlackSwan My business is research/writing, not conversing w/ bullshitters; they shd read my books… & tweets! Harari has a staff of 12 handling stuff. Me: staff of 0, but email robot deletes interview requests not from friends. Gabish? Permalink 10:12 AM – 7 Apr 2020

@nntaleb The legal system will fix the problem. Sue owners (private equity funds) & managers for knowingly endangering your life.   Permalink 9:44 AM – 7 Apr 2020

@nntaleb The argument by the @WHO imbeciles & journo fellow travelers that masks “can give a false sense of security” is interesting. Let’s apply it to: +seat belts +airbags +helmets +door locks +condoms +circuit breakers +parachutes +bulletproof vests +fire alarms +scholomorochs … Permalink 9:17 AM – 7 Apr 2020

@nntaleb The argument by the @WHO imbeciles & journo fellow travelers that masks “can give a false sense of security” is interesting. Let’s apply it to: +seat belts +airbags +helmets +door locks +condoms +circuit breakers +parachutes +bulletproof vests +fire alarms +scholomorochs … Permalink 9:17 AM – 7 Apr 2020

@nntaleb As I said, the problem we face is “science” journalism. A real problem. #AbsenceofEvidenceisNotEvidenceofAbsenceParticularlyUnderRiskAsymmetries   Permalink 8:05 AM – 7 Apr 2020

@nntaleb Something tells me the quarantine might last longer than planned. Permalink 4:50 AM – 7 Apr 2020

@nntaleb Levantine is not Arabic Permalink 7:08 PM – 6 Apr 2020

@nntaleb I can provide some training if you need, @NAChristakis. God (or evolution) invented curse words for a reason.   Permalink 6:55 PM – 6 Apr 2020

@nntaleb Idiots! Scientism kills pple’s innate reasoning abilities & survival instinct You don’t wear a mask jus because you have evidence that transmission is airborne. You wear a mask because YOU DON’T KNOW whether transmission is airborne. #Asymmetry.   Permalink 6:22 PM – 6 Apr 2020

@nntaleb 3) Il faut arrêter de me casser les pieds! Marseille, en anglais, s’écrit avec un s. Permalink 3:18 PM – 6 Apr 2020

@PaulSkallas he ended up deleting the tweet Permalink 1:36 PM – 6 Apr 2020

@nntaleb 2/ I wrote this for Mike’s children for them to understand statistical significance, something Bloomberg, Forbes, NYT journalists are not getting yet spreading confusion. So unless they cook their numbers in Marseilles, there is preliminary significance.   Permalink 12:43 PM – 6 Apr 2020

@ejajo Written in 2016, happening now: “They can thus cause monstrous iatrogenics[1] without even feeling a shade of a guilt, because they are convinced that they mean well and that they can be thus justified to ignore the deep effect on reality.” [1] Harm done by the healer. #IYI Permalink 12:33 PM – 6 Apr 2020

@nntaleb Not surprising given my analysis of the Marseilles data (see tweet w/the Mathematica file). The question is how large the effect. Also why the smear campaign ag. Raoult? OK, he’s the most cited virologist who talks on TV like a TV healer; doesn’t help.   Permalink 12:21 PM – 6 Apr 2020

@BiruniKhorasan According to all accounts, Ibn Sina did not suffer fools. The more I read about him, the more he reminds me of @nntaleb If Ibn Sina lived in 2020 and had an encounter with a fool on Twitter, he would first call him “idiot” and then block him. 100% positive. Permalink 12:01 PM – 6 Apr 2020

@nntaleb I a preparing an elementary thread on what risk management means and how “evidence based” is often endangering people. Permalink 10:39 AM – 6 Apr 2020

@nntaleb In by forthcoming book The Statistical Consequences of Fat Tails Permalink 10:26 AM – 6 Apr 2020

@nntaleb The IYI has a copy of The Black Swan on his shelves but mistakes absence of evidence for evidence of absence. (article from 3 ½ years ago)   Permalink 9:36 AM – 6 Apr 2020

@nntaleb The “evidence based” idiots such as Ioannidis not getting absence of evidence vs evidence of absence in the risk domain.   via @YouTube Permalink 8:19 AM – 6 Apr 2020

@nntaleb That NYT? +Ran articles about irrationality of worrying about the pandemic +Opposed the travel ban +Now blaming the administration for not having stiffer travel ban   ” target=”_blank”>”> Permalink 7:25 AM – 6 Apr 2020

@nntaleb Criminally stupid.   Permalink 4:15 AM – 6 Apr 2020

@nntaleb “Evidence based” means that she recommended in her Forbes column in late February that people wear no masks. Yes, NO masks. Because absence of evidence is not evidence based. It is hard to share the planet with such dangerous people.   Permalink 4:31 PM – 5 Apr 2020

@nntaleb Good news from Lebanon. This is the cabinet meeting in early March (when Boris & Trump had their full mugs exposed). They acted quickly. They have <20 death (~4.5 mil) 100 times less than than NY. Acting quickly pays. And wear your fucking mask! Permalink 11:10 AM – 5 Apr 2020

@nntaleb Now, either @raoult_didier’s treatment (chloroquine) is incontrovertibly effective or, + More people are dead than claimed (in Marseilles the dead have been actively voting since the Fr. revolution) + He treats pple who don’t need treatment + Something in the water/confounder Permalink 10:51 AM – 5 Apr 2020

@nntaleb 2) Genetics & misunderstanding of dimensionality   Permalink 9:54 AM – 5 Apr 2020

@nntaleb The work in progress is here. Not yet the curse of dimensionality. 1) Correlation   Permalink 9:53 AM – 5 Apr 2020

@nntaleb Once we are done with the epidemiological models, we will show why polygenic scores produce spurious results like these & why this claim is PURE noise. Hint: curse of dimensionality, paper to come. PS–genetics is a mess.   Permalink 8:52 AM – 5 Apr 2020

@nntaleb Mike Lawler (@mikeandallie) should make his kids derive the significance of the Raoult chloroquine results, a trivial illustration –something that seems to escape medical commentators. Permalink 7:37 AM – 5 Apr 2020

@DrSamPappas Excellent map @ByzantinFR of genetic lineages and overlap of civilizations @_Tom_Pappas @amyriolo @MikeEmanuelFox of Eastern Mediterranean regions as inspired by a tweet from @nntaleb summer 2019   Permalink 7:02 AM – 5 Apr 2020

@nntaleb I am amazed that an error that eludes “evidence based” “scientists”, nonprobabilist statisticians, Pinker-style naive empiricists… is explained very simply by Mike to his kids.   Permalink 6:29 AM – 5 Apr 2020

@mikeandallie Explaining an important statistical idea in @nntaleb ‘s “What you see and what you don’t see” paper to kids:   #math #mathchat Permalink 6:03 AM – 5 Apr 2020

@nntaleb Department of hindsight: the NYT is now blaming mobility. Yet they were publishing crap saying it was not rational to panic when Yaneer, Joe, and I were advocating what looked like an “overreaction”.   Permalink 5:26 AM – 5 Apr 2020

@nntaleb No soft allowed; hint: you can prove the limit though using special functions. (Please note that I have been blocking those posting snide remarks; this is ONLY for those into these things.) Permalink 6:38 PM – 4 Apr 2020

@nntaleb Quarantine Workout Permalink 5:55 PM – 4 Apr 2020

@yaneerbaryam BMJ published a paper with a basic simple error and incorrect conclusions. I submitted a note but didn’t retract yet. Link to the paper and comment attached. @nntaleb   ” target=”_blank”>”> Permalink 2:36 PM – 4 Apr 2020

@NickyWill100 @nntaleb’s Grandmother knew that you dummies.   Permalink 2:36 PM – 4 Apr 2020

@NAChristakis People who are dying of COVID19 will need first-rate palliative (hospice) care. This is going to be especially the case for people who are denied ventilators or who are taken off of them (i.e., who are “extubated”). Let’s talk about this painful and poignant fact. 1/ Permalink 2:24 PM – 4 Apr 2020

@tony_zy This @Forbes article on Feb.29, when the virus was quietly spreading, still haunts me today.   Permalink 6:28 AM – 4 Apr 2020

@HsenAndil She3er Malte 3an l Malte cc: @nntaleb Permalink 5:33 AM – 4 Apr 2020

@nntaleb #RWRI   Permalink 4:45 AM – 4 Apr 2020

@nntaleb With (some) corrections Permalink 4:28 AM – 4 Apr 2020

@nntaleb This 2 page paper should put the nail in the coffin of “evidence based” science and risk management. Any comments? Posting on ArXiv & looking for a journal as it is a new result in Extreme Value Theory. Permalink 3:50 AM – 4 Apr 2020

@TalebWisdom “The most important aspect of fasting is that you feel deep undirected gratitude when you break the fast.” – @nntaleb Permalink 9:02 PM – 3 Apr 2020

@nntaleb Nice summary.   Permalink 4:23 PM – 3 Apr 2020

@nntaleb No, on the EXPECTED Maximum (i.e. average maximum), not the Maximum expected. Permalink 1:55 PM – 3 Apr 2020

@nntaleb Be careful. The problem with work related conversations on web apps during this period is that, unlike water cooler schmoozes, everything you say can be recorded for life. Permalink 12:20 PM – 3 Apr 2020

@nntaleb LOCALISM The higher you go the more incompetence/reckelessness (with small exceptions). If this virus ever teaches anything, it is localism. You Your family Your town Your region/county/state Federal Gov: CDC The UN/@WHO Permalink 10:09 AM – 3 Apr 2020

@nntaleb Surprised? No. Jobless claims has ALWAYS been power law distributed. These idiotic macroeconomists never realized it. As I said in The Black Swan econometricians are charlatans, & will STAY charlatans. My new book SCFT explains in details. Permalink 7:15 AM – 3 Apr 2020

@nntaleb No, no, no. Under such fatness of tails for pandemics, policy is made off the expected maximum, not from scenarios devoid of error terms. Just like flood policy in the low countries. See Paper with @DrCirillo   Permalink 5:12 AM – 3 Apr 2020

@johnepattison I mean this sincerely, not snarkily: Smart people I follow here — @nntaleb and @chrismartenson — have been saying for weeks that everyone should be wearing masks. What else are those people saying that we should act on NOW rather waiting until later? Permalink 4:10 PM – 2 Apr 2020

@aPosteriorChain It is now clear that someone at @WHO has a dying wish to be called an imbecile by @nntaleb, this is the only possible explanation Permalink 3:30 PM – 2 Apr 2020

@nntaleb Albert-Laszlo @barabasi was waaaaaaay ahead in determining tail events consistent w/statistics described *ahead* of time –such as cascading failures leading to power outages. I recall the power failure in NY in 2003. You must take him seriously. #PrecautionaryPrinciple   ” target=”_blank”>″> Permalink 2:42 PM – 2 Apr 2020

@TalebWisdom “There is something common to modern “liberal” and Sunni-Salafi education: They teach students answers rather than how to ask questions.” – Nassim Taleb Permalink 1:27 PM – 2 Apr 2020

@yaneerbaryam Remember the talk about herd immunity, or letting young people get sick and work? Stopping it fast is the only way.   Permalink 12:47 PM – 2 Apr 2020

@nntaleb The general public is more creative than bureaucrats.   Permalink 9:44 AM – 2 Apr 2020

@nntaleb IYI bureaucrats opposed to masks used (bogus) arguments abt the protection of the wearer (“not perfect”, etc.) They didn’t think that since it ALSO prevents (more effectively) ASYMPTOMATIC sick pple from spreading it, there wd be yuuge systemic effect. PS: @WHO is a fraud. Permalink 9:36 AM – 2 Apr 2020

@allisonpearson Of all the cruel things, the inability to rush to comfort the dying, or to comfort the bereaved after a loved one has died, may be the cruellest. #coronavirus Permalink 9:26 AM – 2 Apr 2020

@swani741 Please get on the case of this bc Pharma & their allies in corporate media are going to do everything in their power to discredit this cheap & widely available drug & anyone being honest about it. .   Permalink 8:59 AM – 2 Apr 2020

@nntaleb Friends, an obvious test w/asymmetric signal: How many pple treated for rheumatoid arthritis, lupus, or malaria by a *certain* dosage of chloroquine or hydrochquine have been under ventilation for corona vs rest of local population? Answer wld be a v. strong statistical signal. Permalink 8:05 AM – 2 Apr 2020

@CharlestonArchi After the plague, I hope that @nntaleb will do to charlatanism in academic architecture what he has done to IQ, psychology, social sciences, etc. It would be a joy to watch it unfold here on Twitter. This glorious exchange is from 2018: Permalink 5:35 AM – 2 Apr 2020

@nntaleb Il revient beaucoup, beaucoup moins cher de fermer ses frontières que de fermer ses: magasins, usines, écoles, bureaux, bordels, restaurants, cafés, stades, salles de dance, facs, glaciers, musées, écoles de ping-pong…   Permalink 4:35 AM – 2 Apr 2020

@nntaleb “Govt policy (when dealing with floods or pandemics) is dictated by the expected maxima of the distribution of harm, rather than the mean.” “Evidence-based” methods naively work with the expected mean, not the extremes. (paper agst BS “forecasting”)   ” target=”_blank”>”> Permalink 3:36 AM – 2 Apr 2020

@vtchakarova Yes, more or less. You take the #RWRI pill – you end up in Incerto-land, and Taleb shows you how deep the rabbit hole goes! I am launching our first Vienna #RWRI virtual meeting with the other two RWRI alumni @Arquitect3 and @MrFels this weekend. @nntaleb   Permalink 2:14 AM – 2 Apr 2020

@nntaleb BS vendors will BS vend.   Permalink 5:04 PM – 1 Apr 2020

@nntaleb New version of our paper on the tails of pandemics w/@DrCirillo With a key sentence to understand why epidemiological models become noise –as well as other attempts to forecast outcomes.   ” target=”_blank”>”> Permalink 10:17 AM – 1 Apr 2020

@nntaleb Follow the money: Many people like @Kevinfolta and this charlatan @dgardner (phil the rat Tetlock’s @Ptetlock coauthor) are directly (or indirectly) paid to say that the Precautionary Principle is crap.   Permalink 7:24 AM – 1 Apr 2020

@nntaleb 5) This article makes me shiver, reminds me of the Monsanto days: pharma can BUY science.   Permalink 6:29 AM – 1 Apr 2020

@nntaleb 4) Again the question is WHY did @WHO try to AVOID testing something yet claim “data is sparce”. You test PRECISELY because data is sparce!   Permalink 6:21 AM – 1 Apr 2020

@nntaleb 3) Now we still DON’T KNOW YET if chloroquine helps, but owing to an asymmetry I would pick it over nothing any minute. Permalink 5:56 AM – 1 Apr 2020

@nntaleb Even in St Georges Hospital in Lebanon they get stuff like this. In NY and Italy, doctors are ignoring “official” guidelines & applying the Raoult therapy early on. Note: Raoult knows his stuff about patients/treatment, not the dynamics of epidemics. Permalink 5:47 AM – 1 Apr 2020

@nntaleb SUSPICIOUS: + Why the WHO bias against masks & Chloroquine? Latter used by doctors in NY, Italy (combination) in early stages. + Why the smear campaign ag. Raoult? He is the most cited viologist + Recall statistical BS in Forbes/Bloomberg + Pharma shut down a factory in France Permalink 5:38 AM – 1 Apr 2020

@VergilDen It’s during these times of crisis that it’s good to remind yourself of those simpler days. For me, the time when Taleb and I sampled all the goodness that is Italy. I will always savor those days like one does a fine lemoncello. Gindon!   Permalink 4:11 AM – 1 Apr 2020

@Samuel_NET @nntaleb has been saying this all along. WHO was wrong.   Permalink 8:01 PM – 31 Mar 2020

@RomainVallee 21/02 dans LePoint. Nassim Taleb conseillant à la France de fermer immédiatement ses frontières .   Permalink 1:35 PM – 31 Mar 2020

@nntaleb People can MAKE their own mask. Do not insult the public’s intelligence.   Permalink 10:17 AM – 31 Mar 2020

@nntaleb 850,000 now   Permalink 10:04 AM – 31 Mar 2020

@nntaleb The Surgeon General should be sued. We will have plenty of time to bring these dangerous idiots to account.   Permalink 10:02 AM – 31 Mar 2020

@Allvvaro Absolutely loving them while in quarantine. I don’t know why I waited so long to start reading them, but it feels like de f****** right time now. Gracias @nntaleb Permalink 9:51 AM – 31 Mar 2020

@nntaleb Serge Galam too; he is angry, very angry   via @libe Permalink 8:40 AM – 31 Mar 2020

@nntaleb Asymmetry: error FROM NOT wearing masks is vastly costlier than the error FROM wearing masks. This would be elementary for grandmothers (decision makers under uncertainty) but something about the @WHO & the @CDCgov w/”evidence based” BS is suspiciously blind to such a notion!   Permalink 6:16 AM – 31 Mar 2020

@nntaleb Now I am not saying that masks work there, rather that owing to an asymmetry you MUST wear one. Decision-making in real life is based on asymmetries. That’s the entire message of the Incerto! Permalink 6:12 AM – 31 Mar 2020

@nntaleb This is the strongest statistical association I’ve seen w/ respect to the virus. Wear a mask, mandate others to wear masks, & remember that @WHO is criminally incompetent. To repeat:@WHO is criminally incompetent. PS-Don’t get into elevators, buses, etc. unless your mask in N95   Permalink 5:05 AM – 31 Mar 2020

@nntaleb Make your own mask, but be careful. It is more effective than nothing, but not as much as an N95. Never leave home without it. PS: the @WHO is a fraud.   Permalink 4:54 AM – 31 Mar 2020

@nntaleb The Corona Crisis is Not a Black Swan   via @YouTube Permalink 4:16 AM – 31 Mar 2020

@EricRWeinstein What is with you? Why don’t you say it: it’s a prisoner’s dilemma because you and the rest of our leadership failed. Your failure means that we the public should take care of our medical heroes by not buying scarce masks while you do whatever it is you do all day with WHO & CDC.   Permalink 1:25 AM – 31 Mar 2020

@iulian_v7 Attended full RWRI twice. It paid off on multiple levels. Here’s one: my portfolio performance during this crisis vs. S&P500. So, RWRI & @nntaleb books are a great investment. Will go there for the 3rd time for sure, and 4th, 5th… Permalink 5:54 PM – 30 Mar 2020

@nntaleb The @WHO shd be renamed WDO (World Disease Organization): had they not existed many lives would have been spared. Friends are smelling conspiracy in WHO’s claims (“evidence based”conflation of absence of evidence for evidence). No, it’s only incompetence. Criminal incompetence. Permalink 5:31 PM – 30 Mar 2020

@nntaleb Everybody comments on my ideas, nobody seems to care that I’ve lost weight (in spite of quarantine)!   Permalink 3:51 PM – 30 Mar 2020

@black_swan_man #blackswanman #theblackswanman @BloombergTV @ErikSchatzker #tailrisk #insurance #keepyourhouse   ” target=”_blank”>”> Permalink 2:53 PM – 30 Mar 2020

@nntaleb This is spin: WHO is a very incompetent org. Prevented masks & were 5 steps behind. Can’t get risk asymmetry! Stat ignorant WHO now trying to do complicated “science” & degrading simple chloroquine in spite of of huge signal, using “dble blind” buzzwords.   Permalink 12:08 PM – 30 Mar 2020

@nntaleb The PDF version is free and available here.   Permalink 10:27 AM – 30 Mar 2020

@nntaleb The book is finally on Amazon. Statistical Consequences of Fat Tails: Real World Preasymptotics, Epistemolog…   via @amazon Permalink 10:21 AM – 30 Mar 2020

@Stephen89756302 @nntaleb on a personal note, thanks: I was in Singapore when they had 14 cases, UK when they had 1, wore masks in public, didn’t check a bag, ate in hotel, self-isolation on return to US. Saw the power of your model, listened, took action for self and others. Bless you. Permalink 10:19 AM – 30 Mar 2020

@EricRWeinstein Can we get a list of the officials, leaders, institutions & spokespeople who are consciously lying about “masks not being effective in the general population” to hide their own failure to stock masks, and thus pushing our health care professionals in front of this viral train? Permalink 10:07 AM – 30 Mar 2020

@nntaleb CORONA models Models count # people dead and # people infected. They miss a central point: 1)~10-20% of those who get it are spending time in HELL yet w/o qualifying for hospitalization as they don’t need a ventilator. 2) We don’t know the long term reduction in LE from sequels! Permalink 6:15 AM – 30 Mar 2020

@nntaleb LUNG VENTILATORS & INTERMITTENCE Where varying the intensity saves lives: my paper in mathematical medicine “Convex Responses in Medicine” showing the effects of intermittence were well documented w/ventilators (Jensen’s Inequ.). Also in #Antifragile.   ” target=”_blank”>”> Permalink 5:50 AM – 30 Mar 2020

@TommyCaillat 6ème relecture de L’Incerto en cours. Ce confinement est une aubaine si on en prends l’avantage. Lisez. Faites de l’exercise. Prenez le soleil. Mangez correctement. Pas d’excuses. @nntaleb @Mangan150 Permalink 5:40 AM – 30 Mar 2020

@nntaleb Factoid of the day: The Montgomerys have the (Phoenician) J2 haplogroup (J2a1-Y22056 (aka Z40262)). @felhagehistoire   Permalink 5:34 AM – 30 Mar 2020

@birdxi1988 This is what @nntaleb calls the Ludic Fallacy. These guys either did experiments in the class room or in their minds. What they are saying are FAR from the reality. At least from my experience in China, NOBODY had this false feeling of protection while wearing the masks. #RWRI Permalink 7:31 PM – 29 Mar 2020

@jeitoapp Who the fuck needs a scientific paper to know that wearing a mask is better than not wearing one during a global pandemic? Is the world dumber than what I thought?   Permalink 1:37 PM – 29 Mar 2020

@nntaleb Don Bosco Ioannis Damakenos (John of Damascus) Imam Ali Socrates Thomas Aquinas   Permalink 12:29 PM – 29 Mar 2020

@NonMeek When you’re right, you’re right.   ” target=”_blank”>”> Permalink 11:29 AM – 29 Mar 2020

@nntaleb I don’t do interviews anymore (not my job). But newspapers narrate the twitter feed. Works.   Permalink 10:51 AM – 29 Mar 2020

@FattestFatTony Mask tutorial courtesy of @who   Permalink 8:16 AM – 29 Mar 2020

@FattestFatTony Just to piss off @WHO #NewProfilePic Permalink 6:52 AM – 29 Mar 2020

@nntaleb Ask for 5, settle for 3 (but don’t tell anyone yet!)   Permalink 6:51 AM – 29 Mar 2020

@nntaleb Mayor of Amioun: on the other side of the Med, very diplomatic. Permalink 6:42 AM – 29 Mar 2020

@nntaleb Localism!   Permalink 6:32 AM – 29 Mar 2020

@ole_b_peters Different countries are at different stages in the pandemic, and under different levels of stress currently. That allows a little bit of load sharing. Germany responded early, e.g. the labs prepared for mass testing in January when the virus was sequenced in China. Permalink 4:27 AM – 29 Mar 2020

@nntaleb In the absence of further information, there is no downside to such strategy.   Permalink 4:15 AM – 29 Mar 2020

@sarah_cone ⁦@nntaleb⁩ has been saying this for only a few decades at least.   Permalink 2:23 AM – 29 Mar 2020

@MarinaStavrou9 I need to watch this again.. I need Italian Mayors to sort you ALL out the world needs Italian Mayors to sort the world out not passionless journos & clueless academics.. Permalink 12:14 AM – 29 Mar 2020

@Gh0xuLZHXdi3LEf Μένουμε σπίτι. Permalink 6:57 PM – 28 Mar 2020

@naval WHO isn’t going to warn you. CDC isn’t going to test you. FDA isn’t going to cure you. FEMA isn’t going to feed you. Save yourself. Permalink 2:54 PM – 28 Mar 2020

@ElegantiaeArbit That feel when @nntaleb and co have been issuing better, more accurate, more consistent advice for several months than the CDC, WHO, et cetera   Permalink 11:15 AM – 28 Mar 2020

@ElegantiaeArbit That feel when @nntaleb and co have been issuing better, more accurate, more consistent advice for several months than the CDC, WHO, et cetera   Permalink 11:15 AM – 28 Mar 2020

@nntaleb Die Corona-Pandemie ist kein schwarzer Schwan: Warum 2020 nach Nassim Nicholas Taleb nicht mit 2008 zu vergleichen ist   via @NZZ Permalink 10:21 AM – 28 Mar 2020

@amconmag Comparative advantage, the philosophical basis of free trade, works, if by “works” you mean “maximizes efficiency at the expense of redundancy and anti-fragility.”   Permalink 9:45 AM – 28 Mar 2020

@nntaleb With Branson the problem is compounded: + He is a tax refugee: he lives in the BVI & since UK has no worldwide taxation, pays no taxes. Yets wants the UK taxpayer’s backstop. + He walks around virtue-faking with TED/Davos crowd. Let him go bust. Planes will fly w/new owners!   Permalink 7:35 AM – 28 Mar 2020

@nntaleb Localism doesn’t mean total anarchy for communes to do what they want. It is fractal (multiscale), but w/maximal control at the bottom. Localism allows central government to impose interzones lockdowns, but towns can shut themselves if they wish (Italian cities during plague).   Permalink 7:24 AM – 28 Mar 2020

@nntaleb The worst in the hall of shame is @CassSunstein who represents all that’s evil in the IYIs: he pathologizes cautious people by finding some… disorder He wanted the Obama admin to manipulate pple away from their caution against GMOs by hiding labels.   Permalink 7:15 AM – 28 Mar 2020

@Nlitsardopoulos The point of NNT is that of scale and acceleration. E.g the time it took a boat to get from Crimea to Genoa in 14th century, compared to the time it took an airplane to get from London to New York. Permalink 6:39 AM – 28 Mar 2020

@nntaleb Ordered masks on Amazon 2 weeks ago. The seller decided to not charge me. Will send money to rescue efforts as it is unfair for me to benefit from my media presence, particularly that it relates to the corona hedging. Permalink 4:07 PM – 27 Mar 2020

@nntaleb It is largely for the sake of these airlines that governments did not stop traffic from China. Now taxpayers need to bail them out, spending trillions. Penny wise, Trillions of dollars foolish. Permalink 2:54 PM – 27 Mar 2020

@nntaleb I immediately smelled a rat with 10 Downing when I was told their chief advisor was using, liking, or doing something with @PTetlock’s “Superforecasters”. I realized he must be a BS vendor/IYI. Turned out he was.   Permalink 12:39 PM – 27 Mar 2020

@nntaleb “Life is long gamma”, RIP Anthony Glickman   Permalink 10:57 AM – 27 Mar 2020

@nntaleb It is common for people like Fauci to know their stuff, but to not understand risk of events. Same with epidemiologists as we saw. The carpenter fallacy: to get an ideas about probabilities of tail sequences at roulette, hire a probabilist not a carpenter. @yaneerbaryam   Permalink 10:26 AM – 27 Mar 2020

@nntaleb Meds & Anatolians refer to themselves via patronymic up to one generation (ides,akis,ian,ben,etc.), like N. Europeans (sson), but some strange villages go matronymic: Jean de Florette (Provence)… Or Kousba, Lebanon: my name there is “Nassim Minerva”, driver:”Michel Rosa”, etc. Permalink 10:13 AM – 27 Mar 2020

@jamesaknight Fair play to them – Boris Johnson, Matt Hancock and Chris Whitty have clearly read this tweet and delivered… #skininthegame   Permalink 9:33 AM – 27 Mar 2020

@churchesuncut Corporations have figured out that politicians are cheaper to buy than insurance #nnt Permalink 9:30 AM – 27 Mar 2020

@nntaleb Corporate Socialism: The Government is Bailing Out Investors & Managers Not You   Permalink 9:21 AM – 27 Mar 2020

@nntaleb An interesting regularity. Greeks refer to name and place of origin, even in Levant (Athenadoros of Berytus, Lukianos of Emesa,… , Shmokron of Alexandria) S Semitic speakers refer to their ancestors: Jehoshua bn X bn X bn X bn David… As in the Bible you get long genealogy!   Permalink 8:57 AM – 27 Mar 2020

@RepThomasMassie (10/11) This stimulus should go straight to the people rather than being funneled through banks and corporations like this bill is doing. Permalink 8:48 AM – 27 Mar 2020

@Safaitic #coronaepigraphy day 13: How many generations of your family can you count back? This #Safaitic inscription contains a genealogy of 20 generations. Assuming a generation = 20 years, this author knew the names of his ancestors going back 400 years! A thread on his lineage. Permalink 8:18 AM – 27 Mar 2020

@normonics Libertarians dont get liberty It’s not about doing whatever the f you want despite how it impacts others It’s doing whatever the f you want CONDITIONAL on not harming others   Permalink 8:10 AM – 27 Mar 2020

@nntaleb DISCOVERY DU JOUR Blocking idiots on Twitter after telling them “I block idiots” “Sorry, I block idiots” “Sorry, I block idiots, nothing personal” is not a violation of Twitter’s terms of service (& the laws of the Federal Republic of Germany). Permalink 6:27 AM – 27 Mar 2020

@nntaleb Before weightlifting, or course.   Permalink 5:57 AM – 27 Mar 2020

@nntaleb Few people know that Boris Johnson is Turkish on his paternal side: his grandfather Osman Kemal became “Wilfred Johnson”. Hence most likely the East Med J2 haplogroup…   Permalink 5:56 AM – 27 Mar 2020

@nntaleb It was NOT a 30 sigma. Anyone using sigma in economics is a fraud. Permalink 5:50 AM – 27 Mar 2020

@nntaleb OK, if after that jobless claims number anyone still uses macroeconomic tools w/”variance” “standard deviation”, “kurtosis” etc. should be arrested. I said in The Black Swan & next textbook (Chap 3) that economists are frauds. This is the PROOF before the last move. Permalink 5:48 AM – 27 Mar 2020

@nntaleb Respect (both from me and from our common friend in the South East)   Permalink 5:26 AM – 27 Mar 2020

@FattestFatTony Fat Tony don’t believe much in conspiracy theories. Why? The “geniuses” at the top have proven time and time again they’re too stupid to pull anyting that elaborate off…   Permalink 5:11 AM – 27 Mar 2020

@AviSolomon8 @chrislhayes @bruces The Greeks have not forgotten the lessons of history… Permalink 3:07 AM – 27 Mar 2020

@MasaSkiba “You cannot hedge the risk of epidemics, unless you stop airplanes from flying.” @nntaleb May 19, 2010. Permalink 12:56 PM – 26 Mar 2020

@nntaleb Friendship and enmity are both path dependent. Former friends (rats) are permanent enemies & former enemies are permanent friends. “I treat my friends as temporary pre-enemies, my enemies as temporary pre-friends, & my post-friends as permanent enemies.” Bed of Procrustes Permalink 12:04 PM – 26 Mar 2020

@PZalloua We need to know how the virus is spreading in the community and who is more likely to spread it? The more we know the better we can prevent @yaneerbaryam @nntaleb @normonics Permalink 8:32 AM – 26 Mar 2020

@nntaleb The Gods watch over our BSBPB (BS Busting Probabilist Brigade, includes the anti-naive-probabilism school of @HarryDCrane, the ergodic one of @ole_b_peters, and many more): Flawed paper by nudge IYI @CassSunstein had 107 dowloads in 6 months (Compared to 10K-100K for us). Permalink 7:01 AM – 26 Mar 2020

@nntaleb Corporate Socialism: The Government is Bailing Out Investors & Managers Not You   Permalink 4:51 AM – 26 Mar 2020

@Jaffer22915438 1/ Friends, my twitter feed has become a Real World Twitter Institute (nod to Nassim). Decided to chronicle this entrepreneurial journey in crisis distribution filling a supply gap. Yes, we make money but challenges pop up daily. Permalink 4:51 AM – 26 Mar 2020

@nntaleb I just published Corporate Socialism: The Government is Bailing Out Investors & Managers Not You   Permalink 5:16 PM – 25 Mar 2020

@normonics Permalink 5:13 PM – 25 Mar 2020

@nntaleb Forbes’ @tarahaelle wrote “showed no significant difference in outcomes between those who received the drug & those who received usual care.” In other words: “showed no significant difference in outcomes FOR THOSE WHO DID NOT NEED IT” since those they are discussing were CURED Permalink 4:59 PM – 25 Mar 2020

@nntaleb Let me explain why Forbes’s @tarahaelle & Bloomberg’s @Business are making a statistical fraud concerning chloroquine: + You NEVER look for people who healed on their own on BOTH sides: 14 pple who recovered w/& 14 pple w/o Cloroquine tell you NOTHING about the drug. Fraudsters   Permalink 1:32 PM – 25 Mar 2020

@IvanBlecic @nntaleb, @yaneerbaryam & the gang won this debate. There’s an expression in Italian: “la merda viene a galla”. Fascinating the sheer SPEED w/ which BS has been detected in the last 2 months. Wld’ve taken years (if ever), dismantled one after another, in nifty 3-days instalments.   Permalink 1:26 PM – 25 Mar 2020

@nntaleb This is Fake News, Statistically. Forbes should remove   Permalink 1:12 PM – 25 Mar 2020

@nntaleb Localism du Jour Many Italian towns survived the Plague by closing their gates.   Permalink 10:17 AM – 25 Mar 2020

@nntaleb Localism du Jour Many Italian towns survived the Plague by closing their gates.   Permalink 10:17 AM – 25 Mar 2020

@phl43 Permalink 9:59 AM – 25 Mar 2020

@nntaleb DECISION-MAKING UNDER UNCERTAINTY & ASYMMETRY Let me make my point clear. Does Chloroquine work? I am not sure. But…if infected & very sick, would I take Chloroquine? 100% Yes. In the right dosage: it has been around for decades & we know its side effect & drug interactions.   Permalink 9:35 AM – 25 Mar 2020

@TMFStoffel If I had to read just two paragraphs of @yaneerbaryam and @nntaleb’s op-ed in the UK, this would be it. But you have an extra two minutes, so you should read the whole thing:   ” target=”_blank”>”> Permalink 9:14 AM – 25 Mar 2020

@drjamesdinic 500 patients in northern Italy are starting to breathe thanks to hacked scuba gear, modified with 3D printers. #COVIDー19 solutions!   @joerogan Permalink 8:02 AM – 25 Mar 2020

@nntaleb This friend of mine wants to lecture live on social media while writing equations on a classroom blackboard. Any tripod with remote ctrl (for Iphone 11) that you recommend? Permalink 8:01 AM – 25 Mar 2020

@nntaleb 2/ @DrCirillo & I looked at the data, & we were shocked: it has the FATTEST tails I’ve seen. Fatter than the Levy distribution (alpha<½). Under such DEEP uncertainty you never gamble with idiotic scenario models. Never.   Permalink 7:31 AM – 25 Mar 2020

@nntaleb 2/ @DrCirillo & I looked at the data, & we were shocked: it has the FATTEST tails I’ve seen. Fatter than the Levy distribution (alpha<½). Under such DEEP uncertainty you never gamble with idiotic scenario models. Never.   Permalink 7:31 AM – 25 Mar 2020

@TaroniAndrea When all this is over, @nntaleb will still be an asshole. But he will also still have been right.   Permalink 6:33 AM – 25 Mar 2020

@nntaleb 2) In other words: Compare # of people who don’t recover but received Chloroquine to # people who don’t recover and receive nothing. Bloomberg should not be spreading this dangerous BS! Permalink 5:46 AM – 25 Mar 2020

@nntaleb The UK’s coronavirus policy may sound scientific. It isn’t | Nassim Nicholas Taleb and Yaneer Bar-Yam   Permalink 5:43 AM – 25 Mar 2020

@nntaleb Statistical flaw in the conclusion: That study says almost NOTHING about Chloroquine. The comparison now is conditioned on BOTH being cured. You need cases without spontaneous recovery, such as Reault’s.   via @business Permalink 5:20 AM – 25 Mar 2020

@Jaffer22915438 1/ Do you realize how f*cked up this system is to have someone like me up-fronting millions of dollars to bring masks into the US. 3 weeks ago, I did not know an N95 mask from a dust mask. Not a saint, please. We will make money, but the system is dysfunctional. Permalink 4:17 AM – 25 Mar 2020

@nntaleb Statesman.   Permalink 12:56 PM – 24 Mar 2020

@nntaleb With @DrCirillo. Forgot to thank @BertZwart1 Permalink 10:14 AM – 24 Mar 2020

@nntaleb Tail Risk of Contagious Diseases: Clearly a steep power law. You need vigilance. Complicated epidemiological models are like studies of forks and knives on the Titanic.   via @academia Permalink 10:08 AM – 24 Mar 2020

@nntaleb Respect   Permalink 9:59 AM – 24 Mar 2020

@nntaleb Beats the NY library… Permalink 8:44 AM – 24 Mar 2020

@birdxi1988 A beautiful application of the shadow mean method on pandemics ( It allows you to derive the expected value when the fat tailed distribution is bounded, in this case, by human population on earth ). I was impressed by this method when @nntaleb and @DrCirillo discussed it at #rwri   Permalink 8:27 AM – 24 Mar 2020

@nntaleb And trading, of course. Permalink 8:11 AM – 24 Mar 2020

@nntaleb Math, Twitter, and weightlifting. Same time. Thanks, @GrantSSC for help. Permalink 7:52 AM – 24 Mar 2020

@nntaleb Our fat tails paper shd limit these models for entertainment only Permalink 7:30 AM – 24 Mar 2020

@nntaleb This is a preview of the paper with @DrCirillo: contagious pandemics are fat tailed. Anyone using epidemiological model is like someone counting spoons on the Titanic. Permalink 6:30 AM – 24 Mar 2020

@nntaleb makeshift… Was not a pun but a genuine typo. Permalink 6:05 PM – 23 Mar 2020

@nntaleb Grant @GrantSSC is starting to make lemon out of lemonade, like @Jaffer22915438: delivering makeshit weightlifting equipment to people stuck at home.   Permalink 6:01 PM – 23 Mar 2020

@nntaleb Lesson from a long experience with model blowups:@neil_ferguson, if you need a model w/”thousands of lines”, this is not a model useable for real world risk & decisions–rather something with the FRAGILITY of a house built with matches to impress some tenure committee.   Permalink 4:43 PM – 23 Mar 2020

@MarcosCarreira @nntaleb localism at its best   Permalink 2:04 PM – 23 Mar 2020

@yaneerbaryam Do you know how to sew? Make masks for hospitals, nursing homes, rehab facilities, or yourself. Here is information how. Spread the word   Permalink 9:41 AM – 23 Mar 2020

@nntaleb ANCIENT LANGUAGES DU JOUR Karshum(Kirsh), pum (temm/famm), 3inum, appum(aff, anf), uznum (udn, dayné) are preserved. Interesting: birkum BRK=> RKB (rekbé), tikkum maybe ta2m (to cover neck?) and most interesting: puridum => fard (single)   Permalink 9:16 AM – 23 Mar 2020

@nntaleb One small problem. It is currently in the nation state of Turkey.   Permalink 8:11 AM – 23 Mar 2020

@nntaleb I don’t lift. I just hoard plates as a hobby.   Permalink 8:05 AM – 23 Mar 2020

@nntaleb Bought more plates, just in case. Permalink 7:33 AM – 23 Mar 2020

@nntaleb Now this correlation is a correlation. Remove points and it stays the same. It may tell us however, that richer countries tend to test more, or that people travel much more into and out of richer countries. Check a network graph.   Permalink 5:12 AM – 23 Mar 2020

@mynemosyne54 Body parts in Akkadian Permalink 5:11 AM – 23 Mar 2020

@cdipaola62 WHO finally has “data” Universal Precautions for Respiratory/Droplet borne viruses has been warranted since outbreak When uncertain—>act with Precaution ⁦@endCOVID ⁦@nntaleb⁩ ⁦@yaneerbaryam⁩ ⁦@normonics⁩ ⁦@TuckerCarlson⁩   Permalink 1:41 AM – 23 Mar 2020

@nntaleb Too late, De Blasio. You need to be one step ahead, not three steps behind.   Permalink 5:59 PM – 22 Mar 2020

@birdxi1988 We need to “overreact” to fight the virus, this doesn’t look like that @trishankkarthik @normonics @yaneerbaryam   Permalink 5:33 PM – 22 Mar 2020

@LorenzoWVilla Do you want to try this one? For (a,b,c) real and positive Permalink 2:37 PM – 22 Mar 2020

@nntaleb Something standard Libertarians don’t get (but localists get very well): liberty & threats to others don’t scale the way they think they do. Libertarians need to translate threats to individuals into threats to the collective without naive linear scaling.   Permalink 2:36 PM – 22 Mar 2020

@nntaleb To relax during the quarantine   Permalink 11:06 AM – 22 Mar 2020

@nntaleb 6) Saying “it is nobody’s fault” hence let’s help corps is vicious: risk management=cash to face eventualities WITHOUT knowing what they WILL BE: we have 2 kidneys SO we don’t have to predict how they one will be harmed. Except that a pandemic is NOT a Black Swan. (INCERTO) Permalink 10:45 AM – 22 Mar 2020

@nntaleb 6) Saying “it is nobody’s fault” hence let’s help corps is vicious: risk management=cash to face eventualities WITHOUT knowing what they WILL BE: we have 2 kidneys SO we don’t have to predict how they one will be harmed. Except that a pandemic is NOT a Black Swan. (INCERTO) Permalink 10:45 AM – 22 Mar 2020

@NonMeek Today’s #Offshorecomic | Evidence-based science | inspired by @nntaleb Support my work   ” target=”_blank”>”> Permalink 9:56 AM – 22 Mar 2020

@nntaleb Commentary: “Few solid” I meant “a few solid” (i.e. sufficient to show Harry doesn’t just publish to gain status). Soon we will see the end of pseudo-credentalization/academic poseur. Permalink 9:01 AM – 22 Mar 2020

@nntaleb THE END OF CITATION RINGS Harry Crane, probabilist (mathematical stat),knows his shit. Few solid publications, 350 citations. David Spiegelhalter,”statistician” 100s of pubs, Member of prestigious societies, 111,000 citations. Watch Harry take Spiegelhalter to the cleaners.   ” target=”_blank”>”> Permalink 8:48 AM – 22 Mar 2020

@nntaleb 5) CEOs of bailed out companies must disburse PAST bonuses. Facing the GBRT (Generalized Bob Rubin Trade) where someone has a free option. Permalink 8:31 AM – 22 Mar 2020

@nntaleb 5) CEOs of bailed out companies must disburse PAST bonuses. Facing the GBRT (Generalized Bob Rubin Trade) where someone has a free option. Permalink 8:31 AM – 22 Mar 2020

@nntaleb This result is very robust. Paper posted soon. As probabilist @BertZwart1 (specialist in Extreme Value Theory) observes, this is the result of parameter stochasticity in the SIR model. Making parameters deterministic is what was incompetent in the UK government model.   Permalink 7:47 AM – 22 Mar 2020

@nntaleb I was actually teasing them. A more “elegant” tweet would have been: “It says a lot about them, but also something about you”. Permalink 6:49 AM – 22 Mar 2020

@nntaleb 4) The shareholder should not never end up being rewarded for lack of hedging/insurance. He/she should go first.   Permalink 5:45 AM – 22 Mar 2020

@nntaleb When your archenemies give you praise, it says something about them, but also a lot about you.   Permalink 5:43 AM – 22 Mar 2020

@nntaleb I’ve learned from a long life that someone close to you with a gun can be controlled if you are trained; worry about someone with a knife.   Permalink 5:32 AM – 22 Mar 2020

@nntaleb 3) Airlines/Boeing are lobbying for bailouts, which they will get. How about the small corner restaurant? The independent tour guide? The personal trainer? The prostitute? The barber? The hotdog vendor living from tourists near the Met Museum? Last time (2008) they were ignored. Permalink 5:26 AM – 22 Mar 2020

@nntaleb In PRINCIPIA POLITICA: Permalink 5:21 AM – 22 Mar 2020

@nntaleb Explain to me why we should spent taxpayer money to bailout companies (airlines) who spent their cash buying their own stock so the CEO gets optionality, instead of having a crisis buffer. We should bail out individuals based on needs, not corporations. #Moralhazard Permalink 6:21 PM – 21 Mar 2020

@nntaleb Many people stock up on pasta. Others on toilet papers. Some go for wine. And some people stock up on Olympic weight plates. Permalink 5:33 PM – 21 Mar 2020

@nntaleb Thankful to @SamHarrisOrg. The problemo is too big to worry about personal enmities.   Permalink 5:26 PM – 21 Mar 2020

@nntaleb 2/ In other words, these people MUST have something in common that makes them susceptible to the virus: 4 is too yuuuge to be dismissed as a coincidence. (Conditional probabilities are low for healthy and young, so a few draws are <10^-4). Hidden comorbidity is too explanatory. Permalink 12:55 PM – 21 Mar 2020

The UK’s Coronavirus Policy / Corporate Socialism

The UK’s coronavirus policy may sound scientific. It isn’t  (The Guardian)
Nassim Nicholas Taleb and Yaneer Bar-Yam
Wed 25 Mar 2020

Our research did not use any complicated model with a vast number of variables, no more than someone watching an avalanche heading in their direction calls for complicated statistical models to see if they need to get out of the way.

Corporate Socialism: The Government is Bailing Out Investors & Managers Not You (Medium)
Nassim Nicholas Taleb with Mark Spitznagel
Mar 25, 2020

Why should we spend taxpayer money to bailout companies who spent their cash (and often even borrowed to generate that cash) to buy their own stock (so the CEO gets optionality), instead of building a rainy day buffer? Such bailouts punish those who acted conservatively and harms them in the long run, favoring the fool and the rent-seeker.