ClaimsPeople

Nassim Taleb

Nassim Nicholas Taleb is an author and risk researcher, known for the five-volume Incerto series, which includes Fooled by Randomness.

783 claims collected, 182 researched, 94 resolved. Report of 5 November 2026, method 0.1.0+28da144b.

Scores by kind of claim

Each kind of claim is scored on its own, out of 100: the share that held up, with the range it likely falls in. Fewer resolved claims give a wider range.

  • Factual claims

    Statements about the present or the past, checked against the record: did they hold up?

    73 67 79

    High confidence, 94 factual claims resolved. From 18 documents, 2008 to 2025; 19 documents sampled from 33 candidates found.

    Not scored: 65 unresolvable, 9 checkable only against their own records.

  • Predictions

    Statements about events outside the person's control, checked once they fell due: did they come true?

    Insufficient record: 0 predictions resolved, 5 needed for a score.

    Not scored: 11 unresolvable. 2 more fall due later.

    Does not yet allow for how likely each prediction was when made.

  • Promises

    Commitments to the person's or organisation's own future action, with something to deliver: was it delivered?

    Insufficient record: 0 promises resolved, 5 needed for a score.

    Not scored: 1 checkable only against their own records.

All types combined: 73 (likely 67 to 79, high confidence), from 94 claims: 94 factual claims. It mixes kinds of claim in different proportions for different people, so compare people kind by kind.

Nassim Taleb's claims

182 claims, sorted by newest said. Choose a claim to read it in full.
VerdictKindSaidClaimTopic
Mostly false Factual 28 Sep 2025 The Levant was the most stable area in the world between the early 1800s and 1948, with only skirmishes in 1860. Factual · 28 Sep 2025 Other
Unresolvable Factual 25 Sep 2025 The book listing on Amazon was updated with a total of 50 added pages. Factual · 25 Sep 2025 Their own work or organisation
Mixed Factual 25 Sep 2025 Taleb's point was that bike lanes improve well-being and happiness without generating economic growth. Factual · 25 Sep 2025 Economics and markets
Unresolvable Factual 24 Sep 2025 There has never been a society that welcomed immigration for its own sake. Factual · 24 Sep 2025 Philosophy, ethics and society
Mixed Factual 24 Sep 2025 Entities in biology and economics grow convexly then slow as they saturate; growth may be unbounded but remains sub-logarithmic. Factual · 24 Sep 2025 Science and research methods
Mixed Factual 24 Sep 2025 If ancient populations such as hunter-gatherers and Inuit had a high incidence of cardiovascular disease, the unavoidable conclusion is that cardiovascular problems are at least half genetic. Factual · 24 Sep 2025 Science and research methods
Unresolvable Prediction 24 Sep 2025 A sharp reduction in immigrant labor supply to the U.S. and Europe would trigger hyperinflation due to nonlinear squeeze effects. Prediction · 24 Sep 2025 Economics and markets
Unresolvable Prediction 24 Sep 2025 Soon most U.S. government expenditure will go to servicing debt, and the U.S. lacks political mechanisms to correct this. Prediction · 24 Sep 2025 Economics and markets
Resolved true Factual 22 Sep 2025 Spitz has been bullish on markets for the past 3 years. Factual · 22 Sep 2025 Economics and markets
Unresolvable Factual 22 Sep 2025 Taleb still uses Medium for publishing, and many people recommend Substack. Factual · 22 Sep 2025 Their own work or organisation
Mostly true Factual 21 Sep 2025 The 3rd edition of Statistical Consequences of Fat Tails is available and adds 3 chapters and an appendix on Max Entropy distributions including Tsallis Entropy. Factual · 21 Sep 2025 Their own work or organisation
Unresolvable Factual 21 Sep 2025 Antifragile, published 13 years earlier, is on the NYT bestseller list the weekend of 2025-09-21. Factual · 21 Sep 2025 Their own work or organisation
Unresolvable Factual 19 Sep 2025 Saudi Arabia has entered a NATO-like Islamic alliance with Pakistan, which has nuclear weapons, and is part of a group of friends of China. Factual · 19 Sep 2025 Other
Mixed Factual 19 Sep 2025 Scientists who come up with new ideas and frameworks are more often experienced researchers than young ones. Factual · 19 Sep 2025 Science and research methods
Unresolvable Prediction 19 Sep 2025 Egypt will be next to join the Saudi-Pakistan alliance, and Turkey will soon join informally. Prediction · 19 Sep 2025 Other
Mostly true Factual 30 Mar 2024 The city of Jerusalem is not mentioned even once in the Pentateuch. Factual · 30 Mar 2024 Philosophy, ethics and society
Unresolvable Factual 30 Mar 2024 Daniel Kahneman was the only psychologist who acknowledged the problem of fat tails. Factual · 30 Mar 2024 Science and research methods
Mostly true Factual 18 Mar 2024 Chef Alain Ducasse in France has recently offered a bulgur or quinoa and vegetable dish resembling the "Lent Kibbeh", packaged as a "burger". Factual · 18 Mar 2024 Other
Resolved true Factual 18 Mar 2024 Nassim Taleb has no connection to the website "nassimtaleb.org". Factual · 18 Mar 2024 Their own work or organisation
Unresolvable Factual 2023 The partial expectation GK maps to higher moments, up to the infinite moment (the extremum) dealt with in extreme value theory. Factual · 2023 Science and research methods
Resolved true Factual 2023 The exceedance probability PK corresponds to the zeroeth moment and is always thin-tailed. Factual · 2023 Science and research methods
Resolved true Factual 2023 The exceedance probability PK, as a random variable bounded between 0 and 1, necessarily has thin tails with finite mean, variance and all moments. Factual · 2023 Science and research methods
Mostly true Factual 2023 If tail probability PK does not hedge tail expectation GK, then skill at predicting PK provides no information on GK. Factual · 2023 Science and research methods
Mixed Factual 2023 Binary options on financial instruments proved of little economic value and are not considered an investment in the U.S. and the European Union. Factual · 2023 Economics and markets
Unresolvable Factual 2023 Error in the evaluation of the probability PK can translate into an explosive error in the corresponding threshold K, more so the fatter-tailed the distribution. Factual · 2023 Science and research methods
Resolved true Factual 2023 The paper responds to Tetlock et al. (2022). (2022). Factual · 2023 Their own work or organisation
Unresolvable Factual 2023 The tail index alpha for pandemics is well below 1. Factual · 2023 Other global risks
Mostly true Factual 2023 Binary options are banned by most corresponding regulators in the U.S. and the European Union because they are considered gambling devices. Factual · 2023 Economics and markets
Mostly true Factual 2023 A sum of such bets, whose probabilities are modelled with a Uniform or Beta distribution, becomes Gaussian rapidly. Factual · 2023 Science and research methods
Unresolvable Factual 2023 While the error on a probability can be small and controlled, the error on the corresponding quantity can be infinite. Factual · 2023 Science and research methods
Unresolvable Factual 2023 The same quantity described as well below 1 also applies to wars, so forecasts for tail events in conflicts are not compatible with probability theory. Factual · 2023 Other global risks
Resolved true Factual Nov 2021 The author's specialty is decision making under uncertainty, not theology. Factual · Nov 2021 Their own work or organisation
Mostly true Factual Nov 2021 Shiite Islam shares many features with Christianity, such as a twelve-based structure, the last of whom is associated with Jesus, and self-flagellation rituals commemorating martyrdom. Factual · Nov 2021 Philosophy, ethics and society
Mostly true Factual Nov 2021 Orthodox Christianity has stiffer dietary laws than Western Christianity, with veganism more than 200 days per year. Factual · Nov 2021 Philosophy, ethics and society
Mostly false Factual Nov 2021 Economic forecasts work no better than astrology. Factual · Nov 2021 Economics and markets
Mixed Factual Nov 2021 It took about seventeen centuries from the 'eye of the needle' passage in Matthew 19:24 to the conception of organized communism and theories of social equality. Factual · Nov 2021 Philosophy, ethics and society
Mostly true Factual Nov 2021 Darwinian ideas of evolutionary differences within species naturally lead to notions of eugenics, that humans can improve the race by speeding evolution. Factual · Nov 2021 Philosophy, ethics and society
Unresolvable Factual Nov 2021 Some influence may have run from Christianity to Judaism, the reverse of the usual view that Christianity descends from Judaism. Factual · Nov 2021 Philosophy, ethics and society
Unresolvable Factual Nov 2021 The notion of epistemic belief is entirely modern. Factual · Nov 2021 Philosophy, ethics and society
Unresolvable Factual Nov 2021 Charles Murray lacks statistical knowledge and decided African Americans were inferior before choosing statistical methods to justify it. Factual · Nov 2021 Philosophy, ethics and society
Mostly false Factual Nov 2021 During Covid, some people openly called for geronticide and for letting 'fat people' die. Factual · Nov 2021 Philosophy, ethics and society
Unresolvable Factual Nov 2021 Jesus was the first ancient deity to suffer the punishment of a slave, the lowest-ranking member of humanity. Factual · Nov 2021 Philosophy, ethics and society
Mostly true Factual Nov 2021 The Enlightenment, with the growth of 'science', started finding statistical differences in abilities between people of different races. Factual · Nov 2021 Philosophy, ethics and society
Unresolvable Factual Nov 2021 Holland refuted the myth that Christians destroyed the intellectual production of the classical periods while the Arabs preserved some of it. Factual · Nov 2021 Philosophy, ethics and society
Mixed Factual Nov 2021 Christianity was the vehicle by which separation of church and state was accomplished. Factual · Nov 2021 Philosophy, ethics and society
Mostly true Factual Nov 2021 Emperor Julian did not realize that paganism was a decentralized, overlapping set of club-like affiliations to gods, and tried to organize it like the Church. Factual · Nov 2021 Philosophy, ethics and society
Mixed Factual Nov 2021 Europe is neither a continent, a language group nor a race, since over 100 million EU citizens are olive-skinned and hardly distinguishable from other Mediterraneans. Factual · Nov 2021 Philosophy, ethics and society
Unresolvable Factual Nov 2021 Nassim Taleb argued against IQ theories on statistical grounds, showing IQ to be a fake construct. Factual · Nov 2021 Science and research methods
Unresolvable Factual Nov 2021 Vatican II's translation of prayers from Latin into vernaculars largely removed the element of mystery from Catholicism. Factual · Nov 2021 Philosophy, ethics and society
Mostly true Factual 29 Dec 2020 A part of Fooled by Randomness was inspired by the psychology of Lebanese depositors who enjoyed steady and high returns. Factual · 29 Dec 2020 Their own work or organisation
Mostly true Factual 29 Dec 2020 The new US Dietary Guidelines were negotiated with lobbyists from the food industry, with sugar vendors treated as stakeholders. Factual · 29 Dec 2020 AI policy and governance
Own records only Factual 27 Dec 2020 Taleb has finished the technical content of the Lindy chapter of his book. Factual · 27 Dec 2020 Their own work or organisation
Resolved true Factual 21 Dec 2020 Erdogan threatened legal action against someone who called him a dictator. Factual · 21 Dec 2020 Philosophy, ethics and society
Resolved true Factual 17 Dec 2020 It is a common mistake to think a Lognormal(mu, sigma) distribution has mean mu and standard deviation sigma. Factual · 17 Dec 2020 Science and research methods
Unresolvable Factual 15 Dec 2020 The bulk of the losses in Lebanese 'lollar' deposits is interest not earned at all (and interest on interest). Factual · 15 Dec 2020 Economics and markets
Unresolvable Factual 10 Dec 2020 Volume 3 of Taleb's Incerto includes errors in regression/overfitting in social science, plus IQ metrics. Factual · 10 Dec 2020 Their own work or organisation
Unresolvable Factual Jul 2020 The United States and many other countries have spent trillions of dollars on sophisticated weaponry in past decades to counter uncertain threats. Factual · Jul 2020 Philosophy, ethics and society
Unresolvable Factual Jul 2020 In practically every location affected by COVID-19 there has been local or governmental action to mitigate the pandemic, as of July 2020. Factual · Jul 2020 Biosecurity
Unresolvable Factual Jul 2020 The dataset in reference 6 covers pandemics with fatalities above 1,000 and likely contains most, if not all, such pandemics. Factual · Jul 2020 Biosecurity
Unresolvable Prediction Jul 2020 The scale of the pandemic might change, but its tail properties will remain invariant. Prediction · Jul 2020 Biosecurity
Unresolvable Prediction Jul 2020 If a pandemic is not taken seriously, it will likely run wild, given modern connectivity. Prediction · Jul 2020 Biosecurity
Mostly true Factual Jul 2020 For COVID-19 survivors, the illness is a large economic drain, from lost working hours alone, not counting hospitalization costs. Factual · Jul 2020 Biosecurity
Unresolvable Factual Jul 2020 In the months before July 2020, waiting for better data about COVID-19 caused substantial delays, resulting in thousands of deaths and serious economic consequences. Factual · Jul 2020 Biosecurity
Unresolvable Factual Jul 2020 In New York City, the rule of thumb is that a 15% drop in revenues is enough to make a restaurant shut permanently. Factual · Jul 2020 Economics and markets
Unresolvable Factual Jul 2020 In the lognormal distribution used in the paper's Figure 1, 85% of observations fall below the mean. Factual · Jul 2020 Science and research methods
Unresolvable Factual Jul 2020 In the analysis of reference 6, jackknifing and bootstrapping the pandemic fatality data gives a tail index α consistently below 1. Factual · Jul 2020 Biosecurity
Resolved true Factual Jul 2020 The Netherlands builds and calibrates its dams and dykes on extreme sea levels, including those estimated by modelling the tail with extreme value theory, not on average sea level. Factual · Jul 2020 Other global risks
Unresolvable Factual Jul 2020 Pandemics are extremely fat-tailed events with potentially destructive tail risk. Factual · Jul 2020 Biosecurity
Mostly false Factual Jul 2020 In insurance, survival functions are never used for hedging; expected shortfalls are used instead. Factual · Jul 2020 Economics and markets
Own records only Promise 31 Dec 2019 Taleb is running Twitter symposia on topics in Principia Politica and will integrate the comments into the text. Promise · 31 Dec 2019 Their own work or organisation
Unresolvable Factual 30 Dec 2019 Taleb's lecture "From Ponzi to Localism" angered, among others, Riad Salameh and Lebanese bankers. Factual · 30 Dec 2019 Their own work or organisation
Mostly true Factual 30 Dec 2019 In 2019 Taleb gave a lecture in Lebanese, "From Ponzi to Localism", at USJ, broadcast on Lebanese TV during the riots. Factual · 30 Dec 2019 Their own work or organisation
Mostly true Factual 29 Dec 2019 It is almost always different people who are getting richer, owing to rotation at the top of the wealth distribution. Factual · 29 Dec 2019 Economics and markets
Not yet due Prediction 29 Dec 2019 The probability that any of the books shown in the linked post, except perhaps Dalrymple's and Murakami's, will survive a decade is very small. Prediction · 29 Dec 2019 Other
Mostly true Factual 29 Dec 2019 The richest 1% of people in 2019 are not quite the same individuals as the richest 1% of 2009. Factual · 29 Dec 2019 Economics and markets
Unresolvable Factual 28 Dec 2019 Taleb has written five articles for the New York Times in the past, under pressure from the publisher. Factual · 28 Dec 2019 Their own work or organisation
Unresolvable Prediction 26 Dec 2019 Preliminary entropy-based genetic maps might change how distances between populations and rates of inbreeding are viewed. Prediction · 26 Dec 2019 Science and research methods
Mixed Factual 25 Dec 2019 During 2019 overwhelming DNA evidence emerged that Southern Levantines had DNA indistinguishable from that of Imperial Romans. Factual · 25 Dec 2019 Science and research methods
Unresolvable Factual 23 Dec 2019 The text in the linked post came verbatim from Taleb's Principia Politica. Factual · 23 Dec 2019 Their own work or organisation
Mostly true Factual 22 Dec 2019 Levantine Arabic is not a dialect of Classical Arabic (Fus7a), according to the works of @Safaitic and @PhDniX. Factual · 22 Dec 2019 Science and research methods
Mostly true Factual 2019 In Hayek's account, knowledge is consolidated via prices and arbitrageurs, who trade products, services and financial securities, not binary bets. Factual · 2019 Economics and markets
Resolved true Factual 2019 Morgan Stanley correctly predicted the financial crisis but lost $10 billion on its hedge. Factual · 2019 Economics and markets
Unresolvable Factual 2019 The difference between binary and vanilla payoffs is well known in mathematical finance but does not seem to have been passed on to the decision-theory literature. Factual · 2019 Economics and markets
Mostly true Factual 2019 Value at Risk is not a coherent risk measure because it violates subadditivity. Factual · 2019 Economics and markets
Mostly true Factual 2019 Conditional Value at Risk (CVaR) satisfies the coherence (subadditivity) bound. Factual · 2019 Economics and markets
Mostly false Factual 2019 Financial regulators compute the recovery rate as the unconditional expected value of collateral, without conditioning on the default event. Factual · 2019 Economics and markets
Unresolvable Factual 2019 The Brier score is favored because it does not allow arbitrage and requires perfect probabilistic calibration. Factual · 2019 Science and research methods
Resolved true Factual 2019 XIV, a volatility-linked exchange traded note, went bust in February 2018 after a sudden jump in volatility, while having been able to "predict" volatility correctly. Factual · 2019 Economics and markets
Resolved true Factual 2019 For a continuous random variable X with CDF F_X, the variable U = F_X(X) is uniform between 0 and 1 absent additional information. Factual · 2019 Science and research methods
Unresolvable Factual 2019 Taleb states that one can further verify the Brier score has thinner tails than the Gaussian, as its kurtosis is lower than 3. Factual · 2019 Science and research methods
Mostly true Factual 2019 Most natural and socio-economic variables are continuous and have no compact support, so no exact upper bound is known. Factual · 2019 Science and research methods
Mostly false Factual 2019 Since the 1960s, practically all economic and informational variables have been shown to belong to the D2 class, or at least the intermediate subexponential class, which includes the lognormal. Factual · 2019 Economics and markets
Mostly true Factual 2019 The expected value of collateral conditional on default is often far lower than its unconditional expectation. Factual · 2019 Economics and markets
Resolved true Factual 2019 Payoff terms of the form g(x) = 1 - x² are found in a typical contract called a variance swap. Factual · 2019 Economics and markets
Unresolvable Factual 2019 The Pareto 80/20 distribution has tail index α = 1.16, so the adjusted tail probability is more than 7 times the naive one. Factual · 2019 Science and research methods
Unresolvable Prediction 11 Apr 2018 Technology that is 100 years old will, statistically, last another 100 years. Prediction · 11 Apr 2018 Technology
Unresolvable Factual 11 Apr 2018 Taleb's first book was published about 20 years ago and is still selling. Factual · 11 Apr 2018 Their own work or organisation
Resolved true Factual 11 Apr 2018 Taleb's Incerto is so far a five-volume investigation of luck, randomness and decision making under opacity. Factual · 11 Apr 2018 Their own work or organisation
Mostly true Factual 11 Apr 2018 Only a third of Roman emperors died in their bed. Factual · 11 Apr 2018 Other
Resolved true Factual 11 Apr 2018 Skin in the Game is the last volume of Taleb's Incerto series. Factual · 11 Apr 2018 Their own work or organisation
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Nassim Taleb

Open its page

Factual Other

“This is a huge deal: Saudi Arabia now in a Nato-like Islamic alliance with Pakistan (who has the bomb) and, of couse, part of the League of Friends of China.”

Nassim Taleb, posting on X 19 September 2025 Post by @nntaleb on X, 2025-09-19 (X)

Saudi Arabia has entered a NATO-like Islamic alliance with Pakistan, which has nuclear weapons, and is part of a group of friends of China.

Unresolvable The public record could not settle it.

The second judge would not resolve this claim; the verdict shown is the first judge's.

What would count as true or false

Judge as of 2025-09-19. The claim has three parts: (a) Saudi Arabia has entered a formal alliance with Pakistan that is 'NATO-like', meaning it contains a mutual-defence commitment under which aggression against one counts as aggression against both; (b) Pakistan has nuclear weapons; (c) Saudi Arabia is part of a grouping or circle of states friendly to China. 'Islamic alliance' is met if the pact is between Muslim-majority states (bilateral counts). True: a Saudi–Pakistan agreement with such a mutual-defence clause was signed on or before 2025-09-19, Pakistan is a nuclear-armed state, and Saudi Arabia has formal or widely recognised close ties with China (for example SCO dialogue partner status, a BRICS invitation or membership, or a comprehensive strategic partnership). Mostly true: (a) and (b) hold but (c) holds only loosely, for example close ties with China but no membership of any China-led grouping. Mixed: the agreement exists but is only a cooperation or consultation pact with no mutual-defence commitment, so 'NATO-like' is a substantial overstatement, while the other parts hold. Mostly false: there is only an announced intention or a draft, with no signed agreement by that date. False: no such Saudi–Pakistan defence agreement exists, or Pakistan does not have nuclear weapons.

Evidence

  1. Riyadh-Islamabad defence becomes a shared concern Dawn · 18 September 2025
    “Pakistan and Saudi Arabia have entered into a landmark mutual defence agreement, under which any aggression against one state will be considered an attack on both.”
  2. Strategic Mutual Defence Agreement - Wikipedia Wikipedia · 18 September 2025
    “The pact was signed on 17 September 2025 at Al-Yamamah Palace in Riyadh, by Saudi crown prince and Prime Minister, Mohammed bin Salman and Pakistani prime minister Shehbaz Sharif, during a state visit of the latter to Saudi Arabia.”
  3. Strategic Mutual Defence Agreement - Wikipedia Wikipedia · 18 September 2025
    “Pakistan, which has painstakingly and covertly developed its nuclear weapons program started in 1972 and proved its operational capabilities in 1998.”
  4. Could the Pakistani-Saudi Defense Pact Be the First Step Toward a NATO-Style Alliance? - Nuclear Network Nuclear Network (CSIS) · 6 October 2025
    “While the pact’s NATO-like language signals an intent to strengthen collective deterrence, the SMDA currently lacks the necessary provisions for nuclear deterrence and regional political consensus to evolve into a joint defense framework.”

Reasoning

The evidence shows that a Saudi–Pakistan mutual defence agreement with an aggression-against-one clause was signed on 17 September 2025 [E1][E2], and that Pakistan has nuclear weapons [E3]. No evidence item covers Saudi Arabia's ties to China, so the material cannot settle part (c), which the criteria use to tell true from mostly true.

Cite this claim

Nassim Taleb, “Saudi Arabia has entered a NATO-like Islamic alliance with Pakistan, which has nuclear weapons, and is part of a group of friends of China.” (said 19 September 2025). Verdict: unresolvable. Reliability API, claim c_014b20f20ae3, method 0.1.0+28da144b. https://epistacklabs.com/claims/c_014b20f20ae3

Claims without a verdict

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