# Nassim Nicholas Taleb

Nassim Nicholas Taleb (born 1 January 1960 in Amioun, Lebanon) is an essayist, epistemologist, researcher, and former practitioner of mathematical finance.

## Quotes

* My major hobby is teasing people who take themselves and the quality of their knowledge too seriously and those who don’t have the guts to sometimes say: I don’t know....
** Nassim Nicholas Taleb's Home Page
* You may not be able to change the world but can at least get some entertainment and make a living out of the epistemic arrogance of the human race.
** Nassim Nicholas Taleb's Home Page
* It is now the scientific consensus that our risk-avoidance mechanism is not mediated by the cognitive modules of our brain, but rather by the emotional ones. This may have made us fit for the Pleistocene era. Our risk machinery is designed to run away from tigers; it is not designed for the information-laden modern world.
** Quoted in the introduction to "A Talk with Nassim Nicholas Taleb," Edge (April 2004)
* Much of the research into humans' risk-avoidance machinery shows that it is antiquated and unfit for the modern world; it is made to counter repeatable attacks and learn from specifics. If someone narrowly escapes being eaten by a tiger in a certain cave, then he learns to avoid that cave.
** "Learning to Expect the Unexpected," The New York Times (2004-04-08}
* We should reward people, not ridicule them, for thinking the impossible.
** "Learning to Expect the Unexpected," The New York Times (2004-04-08}

### Fooled by Randomness (2001)

* Delivering advice assumes that our cognitive apparatus rather than our emotional machinery exerts some meaningful control over our actions.
* It does not matter how frequently something succeeds if failure is too costly to bear.
* Trading forces someone to think hard; those who merely work hard generally lose their focus and intellectual energy. In addition, they end up drowning in randomness; work ethics draw people to focus on noise rather than the signal.
* Mild success can be explainable by skills and labor. Wild success is attributable to variance.
* Lucky fools do not bear the slightest suspicion that they may be lucky fools - by definition, they do not know that they belong to such a category.
* Unlike a well-defined, precise game like Russian roulette, where the risks are visible to anyone capable of multiplying and dividing by six, one does not observe the barrel of reality.
* [T]he epic poet did not judge heroes by the result... their fate depended on totally external forces... Heroes are heroes because they are heroic in behavior, not because they won or lost.
** Two: A Bizarre Accounting Method | George Will is No Solon: On Counterintuitive Truths
* Mixing forecast and prophecy is symptomatic of randomness-foolishness...
** Two: A Bizarre Accounting Method | George Will is No Solon: On Counterintuitive Truths
* I do not dispute that arguments should be simplified to their maximum... but people often confuse complex ideas that cannot be simplified into a media-friendly statement as symptomatic of a confused mind. ...MBAs tend to blow up in financial markets, as they are trained to simplify... beyond... requirement. (...I am myself the unhappy holder of the degree.)
** Two: A Bizarre Accounting Method | George Will is No Solon: On Counterintuitive Truths | Humiliated in Debates
* [T]he mental probabilistic map in one's mind is so geared toward the sensational that one would realize informational gains by dispensing with the news.
** Two: A Bizarre Accounting Method | George Will is No Solon: On Counterintuitive Truths | A Different Kind of News
* From the standpoint of an institution, the existence of a risk manager has less to do with actual risk reduction than it has to do with the impression of risk reduction.
** Two: A Bizarre Accounting Method | George Will is No Solon: On Counterintuitive Truths | Epiphenomena
* In the early 1990s... I became addicted to the various Monte Carlo engines, which I taught myself to build... The dividend of the computer revolution... did not come in... e-mail messages and... chat rooms; it was in the sudden availability of fast processors capable of generating a million sample paths per minute.
** Three: A Mathematical Meditation on History | Fun in My Attic | Making History
* My models showed that ultimately almost nobody really survived; bears dropped like flies in the rally and bulls ended up being slaughtered... But there was one exception... option buyers... could buy the insurance against blowup...
** Three: A Mathematical Meditation on History | Fun in My Attic | Zorglubs Crowding the Attic
* I have two ways of learning from history: from the past, by reading the elders; and from the future, thanks to my Monte Carlo toy.
** Three: A Mathematical Meditation on History | Fun in My Attic | Denigration of History
* A... vicious effect of... hindsight bias is that those that are good at predicting the past... think of themselves as good at predicting the future... [W]e live in a world where important events are not predictable...
** Three: A Mathematical Meditation on History | Fun in My Attic | Skills in Predicting Past History
* [H]istory cannot lend itself to experimentation. But... is potent enough... to eventually bury the bad guy. Bad trades catch up with you... Mathematicians of probability give that a... name: ergodicity. [R]oughly... properties of a very... long sample path would be similar to the Monte Carlo properties of an average of shorter ones. ...Those unlucky... in spite of their skills would eventually rise. The lucky fool... would slowly converge to the state of a less-lucky idiot. Each ...would revert to his long-term properties.
** Three: A Mathematical Meditation on History | Fun in My Attic | My Salon
* [A]ge is beauty. ...[M]y instinct is to value distilled thought over newer thinking, regardless of its apparent sophistication—another reason to accumulate the hoary volumes by my bedside... For an idea to have survived so many cycles is indicative of its relative fitness. Noise, at least some noise, was filtered out. ...[P]rogress means that some new information is better than past information, not that the average of new information will supplant past information...
** Three: A Mathematical Meditation on History | Distilled Thinking On Your Palm Pilot | Breaking News
* There are hordes of thoughtful journalists... [I]t is just that prominent media journalism is a thoughtless process of providing the noise that captures people's attention and there exists no mechanism for separating the two.
** Three: A Mathematical Meditation on History | Distilled Thinking On Your Palm Pilot | Shiller Redux
* I... found a significant advantage in selecting aged traders, using as a selection criterion their cumulative years of experience rather than their absolute success... [O]lder people have been exposed longer to the rare event and can be, convincingly, more resistant to it.
** Three: A Mathematical Meditation on History | Distilled Thinking On Your Palm Pilot | Gerontocracy
* Over a short time increment, one observes the variability of the portfolio, not the returns. ...[O]ne sees the variance, little else. ...Our emotions are not designed to understand the point. ...I deal with it by having no access to information. ...I prefer to read poetry.
** Three: A Mathematical Meditation on History | Philostratus in Monte Carlo: On the Difference Between Noise and Information
* [N]ews... is full of noise and... history is largely stripped of it.
** Three: A Mathematical Meditation on History | Philostratus in Monte Carlo: On the Difference Between Noise and Information
* A trader's mental construction should direct him to do precisely what other people do not do.
** Five: Survival of the Least Fit—Can Evolution be Fooled by Randomness | Carlos the Emerging-Markets Wizard | Lines in the Sand
* Veteran trader Marty O'Connell calls this the firehouse effect. ...[F]iremen ...who talk to each other for too long come to agree on many things that an outside, impartial observer would find ludicrous...
** Five: Survival of the Least Fit—Can Evolution be Fooled by Randomness | Carlos the Emerging-Markets Wizard | Lines in the Sand
* [A]t any point in time, the richest traders are often the worst traders. This I will call the cross-sectional problem: At a given time... the most successful traders are likely to be those fit for the latest cycle.
** Five: Survival of the Least Fit—Can Evolution be Fooled by Randomness | Carlos the Emerging-Markets Wizard | Lines in the Sand
* [T]hey share the traits of the acute successful randomness fool who, in addition, operates in the most random of environments. ...[T]heir bosses and employers shared the same trait. They, too, are permanently out of the market.
** Five: Survival of the Least Fit—Can Evolution be Fooled by Randomness | John the High Yield Trader | The Traits They Shared
* There is a saying that bad traders divorce their spouse sooner than abandon their positions. Loyalty to ideas is not a good thing for traders, scientists - or anyone.
** Five: Survival of the Least Fit—Can Evolution be Fool by Randomness | A Review of Market Fools of Randomness Constants | The Traits They Shared
* Just as an animal could have survived because its sample path was lucky... free of the evolutionary rare event, the "best" operators in a given business can... One vicious attribute is that the longer these... can go without encountering the rare event, the more vulnerable they will be to it. ...[S]hould one extend time to infinity, then by ergodicity, that event will happen with certainty—the species will be wiped out! For evolution means fitness to... only one time series, not the average of all possible environments.
** Five: Survival of the Least Fit—Can Evolution be Fool by Randomness | A Review of Market Fools of Randomness Constants | Can Evolution be Fooled by Randomness?
* Why do [people] confuse probability and expectation, that is, probability [vs.] probability times payoff? Mainly because much... schooling comes from examples in symmetric environments... the... bell curve... is entirely symmetric.
** Six: Skewness and Symmetry | The Median is Not the Message
* I have organized my career and business in such a way as to... benefit... I am profiting from the rare event, with asymmetric bets.
** Six: Skewness and Symmetry | Bull and Bear Zoology | Rare Events
* In most disciplines... asymmetry does not matter. ...People in most fields ...do not have problems eliminating extreme values from their sample, when the difference in payoff between different outcomes is not significant ...A professor ...removes the ...outliers, and takes the average of the remaining ones, without ...being ...unsound. A casual weather forecaster does the same ...So people in finance borrow the technique and ignore infrequent events, not knowing that the effect ...can bankrupt a company.
** Six: Skewness and Symmetry | Bull and Bear Zoology | Symmetry and Science
* Many scientists... are... subject to such foolishness... One flagrant example is... global warming... These scientists initially ignored the fact that these [high temperature] spikes, although rare, had the effect of adding disproportionately to the cumulative melting of the ice caps. ...[A]n event, although rare, that brings large consequences cannot be ignored.
** Six: Skewness and Symmetry | Bull and Bear Zoology | Symmetry and Science
* Sometimes market data becomes a simple trap; it shows you the opposite of its nature... [e.g.,] Currencies that exhibit the largest historical stability... are the most prone to crashes.
** Six: Skewness and Symmetry | Almost Everyone is Above Average
* I reject a sole time series of the past as an indication of future performance; I need a lot more than data.
** Six: Skewness and Symmetry | Almost Everyone is Above Average
* [W]e read too much into shallow recent history... but not from history in general [which] teaches us that things that never happened before do happen. ...outside of the narrowly defined time series; the broader the look, the better the lesson.
** Six: Skewness and Symmetry | Almost Everyone is Above Average
* [T]here is a category of traders who have inverse rare events, for whom volatility is often the bearer of good news. Those traders lose money frequently, but in small amounts, and make money rarely, but in large amounts. ...crisis hunters. I am happy to be one of them.
** Six: Skewness and Symmetry | The Rare-Event Fallacy | The Mother of All Deceptions
* Statistics... is all based on... the steady augmentation of the confidence level... [F]or an n times increase in sample size, we increase our knowledge by the square root on n. ...Where statistics ...fails us, is when we have distributions that are not symmetric... If there is a very small probability of finding a red ball in an urn dominated by black ones, then our knowledge about the absence of red balls will increase [even more] slowly. ...On the other hand, our knowledge of the presence of red balls will dramatically improve once one of them is found. This asymmetry in knowledge... is the central philosophical problem for... David Hume and Karl Popper.
** Six: Skewness and Symmetry | The Rare-Event Fallacy | Why Don't Statisticians Detect Rare Events?
* David Hume posed the issue in the following way (as rephrased in the black swan problem by... John Stuart Mill) No amount of observations of white swans can allow the inference that all swans are white, but the observation of a single black swan is sufficient to refute that conclusion.
** Seven: The Problem of Induction | From Bacon to Hume | Cygnus Atratus
* Science had shifted, thanks to Bacon, into an emphasis on empirical observation. The problem is that, without a proper method, empirical observations can lead you astray. Hume came to... stress the need for some rigor in the gathering and interpretation of knowledge... epistemology... Hume is the first modern epistemologist... he was an obsessive skeptic and never believed... that a link between two items could be established as being causal.
** Seven: The Problem of Induction | From Bacon to Hume | Cygnus Atratus
* Maximizing the probability of winning does not lead to maximizing the expectation from the game when one's strategy may include skewness, i.e., a small chance of a large loss and a large chance of a small win. If you engaged in a Russian Roulette-type strategy... you are likely to show up as the winner in almost all samples—except in the year when you are dead.
** Seven: The Problem of Induction | From Bacon to Hume | Neiderhoffer
* [W]e like to emit logical and rational ideas but we do not enjoy this execution.
** Seven: The Problem of Induction | Sir Karl's Promoting Agent | Nobody is Perfect
* What is easier to remember, a collection of facts glued together, or a story, something that offers a series of logical links? Causality is easier to commit to memory. ...What is induction exactly? ...It is very handy, as the general takes much less room in onel's memory than a collection of particulars. The effect of such compression is the reduction in the degree of detected randomness.
** Seven: The Problem of Induction | Sir Karl's Promoting Agent | Induction and Memory
* I will use statistics and inductive methods to make aggressive bets, but I will not use them to manage my risks and exposure. ...[A]ll the surviving traders I know seem to have done the same. ...[T]hey make sure the cost of being wrong is limited ...they know ...which events would prove their conjecture wrong and allow for it ...They would then terminate their trade. This is called a stop loss ...I find it rarely practiced.
** Seven: The Problem of Induction | Sir Karl's Promoting Agent | Pascal's Wager
* A mistake is not something to be determined after the fact, but in the light of the information until that point.
* I always remind myself that what one observes is at best a combination of variance and returns, not just returns.
* I try to make money infrequently, as infrequently as possible simply because I believe that rare events are not fairly valued, and that the rarer the event, the more undervalued it will be in price.
* The major problem with inference... is that those whose profession it is to derive conclusions from data often fall into the trap faster and more confidently... The more data we have, the more likely we are to drown in it. For common wisdom... is to base... decision making on the following principle: It is very unlikely for someone to perform... well in a consistent fashion without doing something right. ...[I]f someone performed better... in the past then there is a great[er] chance of performing better than the crowd in the future... But... [a] small knowledge of probability can lead to worse results than no knowledge at all.
** Part II Monkeys on Typewriters | Survivorship and Other Biases
* [B]ecoming more rational, or not feeling the emotions of social slights, is not part of the human race... not with our current biology. There is no solace to be found from reasoning...
** Eight: Too Many Millionaires | How to Stop the Sting of Failure | You're a Failure
* Optimism, it is said, is predictive of success. ...It can also be predictive of failure. Optimistic people... take more risks as they are overconfident of the about the odds; those who win show up among the rich and famous, others fail and disappear from the analysis.
** Eight: Too Many Millionaires | A Guru's Opinion
* Let us use 10,000 fictional investment managers... [O]nce a manager has a single bad year, he is thrown out of the sample. ...[T]oss a coin; heads and the manager will make $10,000 over the year, tails and he will lose $10,000. ...We have, in a fair game, 313 managers who made money five years in a row. ...[I]f we throw one of these ...into the real world we would get ...comments on his remarkable style, his incisive mind... His biographer will dwell on ...a great mind in the making. ...[S]hould he stop performing (...his odds ...have stayed at 50%) they would start ...finding fault with his dissipated lifestyle. They will find something he stopped doing, and attribute his failure... The truth ...he simply ran out of luck.
** Nine: It is Easier to Buy and Sell than to Fry an Egg | Fooled by the Numbers | Placebo Investors
* The information that a person derived some profit in the past... by itself, is neither meaningful nor relevant. We need to know the size of the population from which he came. If the initial population is 10,000 managers, I would ignore the results.
** Nine: It is Easier to Buy and Sell than to Fry an Egg | Fooled by the Numbers | Ergodicity
* Professor Karl Pearson... devised the first test of nonrandomness... He examined millions of runs of what was called a Monte Carlo (the old name for a roulette wheel)... He discovered... the runs were not purely random. ...Philosophers of statistics call this the reference case problem to explain that there is no true attainable randomness in practice, only in theory.
** Nine: It is Easier to Buy and Sell than to Fry an Egg | Comparative Luck | Professor Pearson Goes to Monte Carlo (Literally): Randomness does not Look Random!
* Even the fathers of statistical science forgot that a random series is bound to exhibit some pattern... Pearson was among the first scholars interested in creating artificial random number generators, tables one could use as inputs for... simulations (precursors of our Monte Carlo simulator). ...[T]hey did not want these tables to exhibit... regularity. Yet real randomness does not look random! ...A single random run is bound to exhibit some pattern ...
** Nine: It is Easier to Buy and Sell than to Fry an Egg | Comparative Luck | Professor Pearson Goes to Monte Carlo (Literally): Randomness does not Look Random!
* At no point during his ordeal did Nero think of himself as 72% alive and 28% dead.
* Probability is not about the odds, but about the belief in the existence of an alternative outcome, cause, or motive.
* We favor the visible, the embedded, the personal, the narrated, and the tangible; we scorn the abstract.
* Wittgenstein's ruler: "Unless you have confidence in the ruler's reliability, if you use a ruler to measure a table you may also be using the table to measure the ruler." (page 224)
* [E]conomists are evaluated on how intelligent they sound, not on a scientific measure of their knowledge of reality. (page 85)
* [E]conomics is a narrative discipline, and explanations are easy to fit retrospectively. (page 257)
* [In] economics... you can disguise charlatanism under the weight of equations and nobody can catch you since there is no such thing as a controlled experiment. Now the spirit of such methods, called scientism by its detractors, continued into the discipline of finance as a few technicians thought their mathematical knowledge could lead them to understand markets. The practice of financial engineering came along with massive doses of pseudoscience. (page 115)

### The Black Swan: The Impact of the Highly Improbable (2007)

Random House, 2008, ISBN 0-81297-918-4
* I disagree with the followers of Marx and those of Adam Smith: the reason free markets work is because they allow people to be lucky, thanks to aggressive trial and error, not by giving rewards or "incentives" for skill.
** p. xxi
* If you want to get an idea of a friend's temperament, ethics, and personal elegance, you need to look at him under the tests of severe circumstances, not under the regular rosy glow of daily life. Can you assess the danger a criminal poses by examining only what he does on an ordinary day? Can we understand health without considering wild diseases and epidemics? Indeed the normal is often irrelevant.
** p. xxix
* It is remarkable how fast and how effectively you can construct a nationality with a flag, a few speeches, and a national anthem; to this day I avoid the label "Lebanese," preferring the less restrictive "Levantine" designation.
** p. 5
* History is opaque. You see what comes out, not the script that produces events, [...] The generator of historical events is different from the events themselves, much as the minds of the gods cannot be read just by witnessing their deeds.
** p. 8
* Categorizing is necessary for humans, but it becomes pathological when the category is seen as definitive, preventing people from considering the fuzziness of boundaries, let alone revising their categories.
** p.15
* But it remains the case that you know what is wrong with a lot more confidence than you know what is right.
** p.58
* We tend to use knowledge as therapy.
** p. 69
* Consider that the turkey's experience may have, rather than no value, a negative value. It learned from observation, as we are all advised to do (hey, after all, this is what is believed to be the scientific method). Its confidence increased as the number of friendly feedings grew, and it felt increasingly safe even though the slaughter was more and more imminent. Consider that the feeling of safety reached its maximum when the risk was at the highest!
** pp. 40–41 (Taleb attributes the parable of the turkey to Bertrand Russell, who originally wrote of a chicken.)
* The casino is the only human venture I know where the probabilities are known, Gaussian (i.e., bell-curve), and almost computable.
** p. 127
* Probability is a liberal art; it is a child of skepticism, not a tool for people with calculators on their belts to satisfy their desire to produce fancy calculations and certainties.
** p. 128
* There is no effective difference between guessing a variable that is not random, but for which information is partial or deficient (...), and a random one (...). In this sense, guessing (what I don't know, but what someone else may know) and predicting (what has not taken place yet) are the same thing.
** p. 142
* Cumulative errors depend largely on the big surprises, the big opportunities. Not only do economic, financial, and political predictors miss them, but they are quite ashamed to say anything outlandish to their clients — and yet events, it turns out, are almost always outlandish.
** p. 149
* Don't cross a river if it is four feet deep on average.
** p. 161
* Forecasting by bureaucrats tends to be used for anxiety relief rather than for adequate policy making.
** p. 162
* The same past data can confirm a theory and its exact opposite! If you survive until tomorrow, it could mean that either a) you are more likely to be immortal or b) that you are closer to death.
** p. 185
* One cannot assert authority by accepting one's own fallibility. Simply, people need to be blinded by knowledge - we are made to follow leaders who can gather people together because the advantages of being in groups trump the disadvantages of being alone. It has been more profitable for us to bind together in the wrong direction than to be alone in the right one. Those who have followed the assertive idiot rather than the introspective wise person have passed us some of their genes. This is apparent from a social pathology: psychopaths rally followers.
** p. 192
* While in theory randomness is an intrinsic property, in practice, randomness is incomplete information.
** p. 198
* Rank beliefs not according to their plausibility but by the harm they may cause.
** p. 203
* This makes living in big cities invaluable because you increase the odds of serendipitous encounters — you gain exposure to the envelope of serendipity.
** p. 209
* Globalization creates interlocking fragility, while reducing volatility and giving the appearance of stability. In other words it creates devastating Black Swans. We have never lived before under the threat of a global collapse. Financial Institutions have been merging into a smaller number of very large banks. Almost all banks are interrelated. So the financial ecology is swelling into gigantic, incestuous, bureaucratic banks — when one fails, they all fall. The increased concentration among banks seems to have the effect of making financial crisis less likely, but when they happen they are more global in scale and hit us very hard. We have moved from a diversified ecology of small banks, with varied lending policies, to a more homogeneous framework of firms that all resemble one another. True, we now have fewer failures, but when they occur... I shiver at the thought.
** pp. 225-226

### Ten principles for a Black Swan-proof world (2009)

    Financial Times, 2009-04-07, source.
* The economics establishment (universities, regulators, central bankers, government officials, various organisations staffed with economists) lost its legitimacy with the failure of the system. It is irresponsible and foolish to put our trust in the ability of such experts to get us out of this mess. Instead, find the smart people whose hands are clean.
* It is the asymmetry of the bonus system that got us here. No incentives without disincentives: capitalism is about rewards and punishments, not just rewards.
* Only Ponzi schemes should depend on confidence. Governments should never need to “restore confidence.” Cascading rumours are a product of complex systems. Governments cannot stop the rumours. Simply, we need to be in a position to shrug off rumours, be robust in the face of them.
* Using leverage to cure the problems of too much leverage is not homeopathy, it is denial. The debt crisis is not a temporary problem, it is a structural one. We need rehab.
* Economic life should be definancialised. We should learn not to use markets as storehouses of value: they do not harbour the certainties that normal citizens require. Citizens should experience anxiety about their own businesses (which they control), not their investments (which they do not control).

### The Bed of Procrustes: Philosophical and Practical Aphorisms (2010)

* An idea starts to be interesting when you get scared of taking it to its logical conclusion.
** p. 3
* Academia is to knowledge what prostitution is to love.
** p. 4
* In science you need to understand the world; in business you need others to misunderstand it.
** p. 4
* Using, as an excuse, others’ failure of common sense is in itself a failure of common sense.
** p. 7
* Procrastination is the soul rebelling against entrapment.
** p. 8
* When we want to do something while unconsciously certain to fail, we seek advice so we can blame someone else for the failure.
** p. 9
* It’s harder to say no when you really mean it.
** p. 9
* Asking science to explain life and vital matters is equivalent to asking a grammarian to explain poetry.
** p. 17
* You exist if and only if you are free to do things without a visible objective, with no justification and, above all, outside the dictatorship of someone else’s narrative.
** p. 17
* People used to wear ordinary clothes weekdays, and formal attire on Sunday. Today it is the exact reverse.
** p. 19
* The book is the only medium left that hasn’t been corrupted by the profane.
** p. 20
* Restaurants get you in with food to sell you liquor; religions get you in with belief to sell you rules.
** p. 21
* To be completely cured of newspapers, spend a year reading the previous week’s newspapers.
** p. 21
* Success is becoming in middle adulthood what you dreamed to be in late childhood.
** p. 22
* Modernity needs to understand that being rich and becoming rich are not mathematically, personally, socially, and ethically the same thing.
** p. 22
* Older people are most beautiful when they have what is lacking in the young: poise, erudition, wisdom, phronesis, and this post-heroic absence of agitation.
** p. 24
* What fools call “wasting time” is most often the best investment.
** p. 24
* Read nothing from the past one hundred years; eat no fruits from the past one thousand years; drink nothing from the past four thousand years (just wine and water); but talk to no ordinary man over forty.
** p. 25
* A man without a heroic bent starts dying at the age of thirty.
** p. 25
* Someone who says “I am busy” is either declaring incompetence (and lack of control of his life) or trying to get rid of you.
** p. 26
* The difference between slaves in Roman and Ottoman days and today’s employees is that slaves did not need to flatter their boss.
** p. 26
* You are rich if and only if money you refuse tastes better than money you accept.
** p. 27
* Modernity: we created youth without heroism, age without wisdom, and life without grandeur.
** p. 27
* You can tell how uninteresting a person is by asking him whom he finds interesting.
** p. 28
* Preoccupation with efficacy is the main obstacle to a poetic, elegant, robust and heroic life.
** p. 29
* Charm is the ability to insult people without offending them; nerdiness the reverse.
** p. 30
* Those who do not think that employment is systemic slavery are either blind or employed.
** p. 30
* They are born, put in a box; they go home to live in a box; they study by ticking boxes; they go to what is called “work” in a box, where they sit in their cubicle box; they drive to the grocery store in a box to buy food in a box; they talk about thinking “outside the box”; and when they die they are put in a box.
** p. 31
* The twentieth century was the bankruptcy of the social utopia; the twenty-first will be that of the technological one.
** p. 31
* You have a real life if and only if you do not compete with anyone in any of your pursuits.
** p. 39
* Only in recent history has “working hard” signaled pride rather than shame for lack of talent, finesse and, mostly, sprezzatura.
** p. 39
* What they call “play” (gym, travel, sports) looks like work.
** p. 40
* Decomposition, for most, starts when they leave the free, social, and uncorrupted college life for the solitary confinement of professions and nuclear families.
** p. 41
* A competitive athlete is painful to look at; trying hard to become an animal rather than a man, he will never be as fast as a cheetah or as strong as an ox.
** p. 41
* Hard science gives sensational results with a horribly boring process; philosophy gives boring results with a sensational process; literature gives sensational results with a sensational process; and economics gives boring results with a boring process.
** p. 45
* A good maxim allows you to have the last word without even starting a conversation.
** p. 45
* The fool generalizes the particular; the nerd particularizes the general; ... the wise does neither.
** p. 53
* You want to be yourself, idiosyncratic; the collective (school, rules, jobs, technology) wants you generic to the point of castration.
** p. 54
* The sucker’s trap is when you focus on what you know and what others don’t know, rather than the reverse.
** p. 56
* Mental clarity is the child of courage, not the other way around.
** p. 57
* Wit seduces by signaling intelligence without nerdiness.
** p. 60
* Greatness starts with the replacement of hatred with polite disdain.
** p. 64
* The tragedy of virtue is that the more obvious, boring, unoriginal, and sermonizing the proverb, the harder it is to implement.
** p. 65
* Ethical man accords his profession to his beliefs, instead of according his beliefs to his profession.
** p. 66
* Just as dyed hair makes older men less attractive, it is what you do to hide your weaknesses that makes them repugnant.
** p. 68
* When conflicted between two choices, take neither.
** p. 71
* For the robust, an error is information.
** p. 72
* It takes extraordinary wisdom and self-control to accept that many things have a logic we do not understand that is smarter than our own.
** p. 78
* Intelligence consists in ignoring things that are irrelevant.
** p. 78
* For the classics philosophical insight was the product of a life of leisure; for me a life of leisure is the product of philosophical insight.
** p. 84
* We learn the most from fools ... yet we pay them back with the worst ingratitude.
** p. 85
* The best test of whether someone is extremely stupid (or extremely wise) is whether financial and political news makes sense to him.
** p. 87
* The weak shows his strength and hides his weaknesses; the magnificent exhibits his weaknesses like ornaments.
** p. 94
* Social science means inventing a certain brand of human we can understand.
** p. 95
* Because our minds need to reduce information, we are more likely to try to squeeze a phenomenon into the Procrustean bed of a crisp and known category (amputating the unknown), rather than suspend categorization, and make it tangible. Thanks to our detections of false patterns, along with real ones, what is random will appear less random and more certain—our overactive brains are more likely to impose the wrong, simplistic, narrative than no narrative at all.
** p. 105
* There is a certain category of fool—the overeducated, the academic, the journalist, the newspaper reader, the mechanistic "scientist", the pseudo-empiricist, those endowed with what I call "epistemic arrogance", this wonderful ability to discount what they did not see, the unobserved.
** p. 106
* We are robust when errors in the representation of the unknown and understanding of random effects do not lead to adverse outcomes —fragile otherwise.
** p. 107
* I have respect for mother nature's methods of robustness (billions of years allow most of what is fragile to break); classical thought is more robust (in its respect for the unknown, the epistemic humility) than the modern post-Enlightenment naïve pseudoscientific autism. Thus my classical values make me advocate the triplet of erudition, elegance, and courage; against modernity’s phoniness, nerdiness and philistinism.
** pp. 107-108
* To become a philosopher, start by walking very slowly.
** p. 114

### Antifragile: Things That Gain from Disorder (2012)

Random House, 2012, ISBN 978-1-4000-6782-4
* I want to live happily in a world I don't understand.
** p. 4
* We didn't get where we are thanks to the sissy notion of resilience.
** pp. 10–11
* Simplicity is not so simple to attain.
** p. 11
* Modernity has replaced ethics with legalese.
** p. 15
* If you see fraud and do not say fraud, you are a fraud.
** p. 15
* Just as being nice to the arrogant is no better than being arrogant toward the nice; being accommodating toward anyone committing a nefarious action condones it.
** p. 15
* Compromising is condoning. The only modern dictum I follow one by George Santayana: A man is morally free when... he judges the world, and judges other men, with uncompromising sincerity. This is not just an aim but an obligation.
** p. 16
* The fragile wants tranquility, the antifragile grows from disorder, and the robust doesn't care too much.
** p. 20
* Half of life—the interesting half of life—we don't even have a name for.
** p. 33
* It is all about redundancy. Nature likes to overinsure itself.
** p. 44
* If humans fight the last war, nature fights the next one.
** p. 46
* Information is antifragile; it feeds more on attempts to harm it than it does on efforts to promote it.
** p. 49
* Much of aging comes from a misunderstanding of the effect of comfort.
** p. 55
* The best way to learn a language may be an episode of jail in a foreign country.
** p. 62
* If I could predict what my day would exactly look like, I would feel a little bit dead.
** p. 63
* Much of modern life is preventable chronic stress injury.
** p. 64
* It is often the mistakes of others that benefit the rest of us—and, sadly, not them ... For the antifragile, harm from errors should be less than the benefits.
** p. 72
* He who has never sinned is less reliable than he who has only sinned once.
* The antifragility of the higher level may require the fragility—and sacrifice—of the lower one.
** p. 74
* It is painful to think about ruthlessness as an engine of improvement.
** p. 75
* There is no such thing as a failed soldier, dead or alive (unless he acted in a cowardly manner)—likewise there is no such thing as a failed entrepreneur or failed scientific researcher ...
** p. 79
* This is the central illusion in life: that randomness is a risk, that it is a bad thing ...
** p. 84
* Injecting some confusion stabilizes the system.
** p. 101
* When some systems are stuck in a dangerous impasse, randomness and only randomness can unlock them and set them free.
** p. 102
* Randomness works well in search—sometimes better than humans.
** p. 103
* Modernity widened the distance between the sensational and the relevant.
** p. 109
* [A] theory is a very dangerous thing to have.
** p. 116
* Few understand that procrastination is our natural defense, letting things take care of themselves and exercise their antifragility.
** p. 122
* Daily news and sugar confuse our system in the same manner.
** p. 127
* What is nonmeasurable and nonpredictable will remain nonmeasurable and nonpredictable ... no matter how much hate mail I get.
** p. 138
* A man is honorable in proportion to the personal risks he takes for his opinion.
** p. 147
* My idea of the modern Stoic sage is someone who transforms fear into prudence, pain into information, mistakes into initiation, and desire into undertaking.
** p. 156
* Our greatest asset is the one we distrust the most: the built-in antifragility of certain risk-taking systems.
** p. 171
* The worst side effect of wealth is the social associations it forces on its victims, as people with big houses end up socializing with other people with big houses.
** p. 174
* I suppose that the main benefit of being rich (over just being independent) is to be able to despise rich people (a good concentration of whom you find in glitzy ski resorts) without any sour grapes. It is even sweeter when these farts don't know that you are richer than they are.
** p. 176 (footnote)
* An option hides where we don't want it to hide.
** p. 184

### Skin in the Game (2018)

Random House, 2018, ISBN 978-0-425-28462-9
* [I]n academia there is no difference between academia and the real world; in the real world, there is.
** Introduction, p. 3.
* [I]t is about distortions of symmetry and reciprocity in life: If you have the rewards, you must also get some of the risks, not let others pay the price for your mistakes. ...If you give an opinion and someone follows it, you are morally obligated to be, yourself, exposed to its consequences.
** Introduction, p. 4.
* In case you are giving economic views: Don't tell me what you "think," just tell me what's in your portfolio.
** Introduction, p. 4.
* [N]ever engage in detailed overexplanations of why something is important: one debases a principle by endlessly justifying it.
** Introduction, p. 5.
* You can be an intellectual yet still be an idiot. 'Educated philistines' have been wrong on everything from Stalinism to Iraq to low-carb diets.
* The knowledge we get by tinkering, via trial and error, experience, and the workings of time, in other words, contact with the earth, is vastly superior to that obtained through reasoning, something self-serving institutions have been very busy hiding from us.
** p. 7
* Bureaucracy is a construction by which a person is conveniently separated from the consequences of his or her actions.
** p. 12
* Avoid taking advice from someone who gives advice for a living, unless there is a penalty for their advice.
** p. 23
* Seeing the psychologist Steven Pinker making pronouncements about things intellectual has a similar effect to encountering a drive-in Burger King while hiking in the middle of a national park.
** p. 43
* Evidence of submission is displayed by the employee’s going through years depriving himself of his personal freedom for nine hours every day, his ritualistic and punctual arrival at an office, his denying himself his own schedule, and his not having beaten up anyone on the way back home after a bad day. He is an obedient, housebroken dog.
** p. 98
* What we saw worldwide from 2014 to 2018, from India to the U.K. to the U.S., was a rebellion against the inner circle of no-skin-in-the-game policymaking "clerks" and journalists-insiders, that class of paternalistic semi-intellectual experts with some Ivy League, Oxford-Cambridge or similar label-driven education who are telling the rest of us 1) what to do, 2) what to eat, 3) how to speak, 4) how to think, and… 5) whom to vote for.
** p. 123
* People who are bred, selected, and compensated to find complicated solutions do not have an incentive to implement simplified ones.
** p. 162
* If your private life conflicts with your intellectual opinion, it cancels your intellectual ideas, not your private life.
** p. 185
* Survival comes first, truth, understanding, and science later.
** p. 214

### Other

* Studying neurobiology to understand humans is like studying ink to understand literature.
** Quoted in

## Quotes about Taleb

* Taleb's distorted sense of social science leads him to make absolute absurd claims concerning the value of analytical modeling. For example, I have in my house ...a wall full of books on statistics and the history of statistics, books I never had the fortitude to burn or throw away; though I find them largely useless outside of their academic applications ...I cannot use them in class because I promised myself never to teach trash, even if dying of starvation." This is a completely incorrect assessment of the role of statistics in the social sciences. Statistical reasoning is quite central to all of social theory and the evaluation of evidence for and against particular social science models, including the evaluation of pharmaceuticals, modeling the demographics of disease, testing products for beneficial and harmful effects, and a host of others. Taleb's generalization from the weakness of standard financial economics to the whole of mathematical discipline is quite unwarranted. However, he does not stop there. All of academia is tarred with his brush of hypocrisy and irrelevance. "...almost all academic papers," he claims, "are made to bore, impress, provide credibility, intimidate even, be presented at meetings, but not to be read except by suckers (or detractors) or, even worse, graduate students." Note that he claims not simply that academic papers "bore," but that is what they are made for! And he claims that academic papers "are not to be read except by suckers"! Taleb's writing is filled with unsubstantiated and improbable statements of this type.
** Herbert Gintis, Review of Nassim Nicholas Taleb, The Black Swan: The Impact of the Highly Improbable (2007), 2012

## External links

* Official website