饭饭TXT > 海外名作 > 《黑天鹅》作者:[美]纳西姆·尼古拉斯·塔勒布/译者:万丹【完结】 > 英文版.txt

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作者:美-纳西姆·尼古拉斯·塔勒布/译者:万丹 当前章节:15386 字 更新时间:2026-6-15 20:55

My being here is a consequential low-probability occurrence, and I

tend to forget it.

Let us return to the touted recipes for becoming a millionaire in ten

steps. A successful person will try to convince you that his achievements

could not possibly be accidental, just as a gambler who wins at roulette

GIACOMO CASANOVA'S UNFAILING LUCK 1 1 9

seven times in a row will explain to you that the odds against such a streak

are one in several million, so you either have to believe some transcendental

intervention is in play or accept his skills and insight in picking the

winning numbers. But if you take into account the quantity of gamblers

out there, and the number of gambling sessions (several million episodes

in total), then it becomes obvious that such strokes of luck are bound to

happen. And if you are talking about them, they have happened to you.

The reference point argument is as follows: do not compute odds from

the vantage point of the winning gambler (or the lucky Casanova, or the

endlessly bouncing back New York City, or the invincible Carthage), but

from all those who started in the cohort. Consider once again the example

of the gambler. If you look at the population of beginning gamblers taken

as a whole, you can be close to certain that one of them (but you do not

know in advance which one) will show stellar results just by luck. So,

from the reference point of the beginning cohort, this is not a big deal.

But from the reference point of the winner (and, who does not, and this is

key, take the losers into account), a long string of wins will appear to be

too extraordinary an occurrence to be explained by luck. Note that a "history"

is just a series of numbers through time. The numbers can represent

degrees of wealth, fitness, weight, anything.

The Cosmetic Because

This in itself greatly weakens the notion of "because" that is often propounded

by scientists, and almost always misused by historians. We have

to accept the fuzziness of the familiar "because" no matter how queasy it

makes us feel (and it does makes us queasy to remove the analgesic illusion

of causality). I repeat that we are explanation-seeking animals who tend to

think that everything has an identifiable cause and grab the most apparent

one as the explanation. Yet there may not be a visible because; to the contrary,

frequently there is nothing, not even a spectrum of possible explanations.

But silent evidence masks this fact. Whenever our survival is in play,

the very notion of because is severely weakened. The condition of survival

drowns all possible explanations. The Aristotelian "because" is not there

to account for a solid link between two items, but rather, as we saw in

Chapter 6, to cater to our hidden weakness for imparting explanations.

Apply this reasoning to the following question: Why didn't the bubonic

plague kill more people? People will supply quantities of cosmetic expia1

2 0 UMBERTO E C O ' S A N T I U B R A RY

nations involving theories about the intensity of the plague and "scientific

models" of epidemics. Now, try the weakened causality argument that I

have just emphasized in this chapter: had the bubonic plague killed more

people, the observers (us) would not be here to observe. So it may not necessarily

be the property of diseases to spare us humans. Whenever your

survival is in play, don't immediately look for causes and effects. The

main identifiable reason for our survival of such diseases might simply be

inaccessible to us: we are here since, Casanova-style, the "rosy" scenario

played out, and if it seems too hard to understand it is because we are too

brainwashed by notions of causality and we think that it is smarter to say

because than to accept randomness.

My biggest problem with the educational system lies precisely in that it

forces students to squeeze explanations out of subject matters and shames

them for withholding judgment, for uttering the "I don't know." Why did

the Cold War end? Why did the Persians lose the battle of Salamis? Why

did Hannibal get his behind kicked? Why did Casanova bounce back from

hardship? In each of these examples, we are taking a condition, survival,

and looking for the explanations, instead of flipping the argument on its

head and stating that conditional on such survival, one cannot read that

much into the process, and should learn instead to invoke some measure

of randomness (randomness is what we don't know; to invoke randomness

is to plead ignorance). It is not just your college professor who gives

you bad habits. I showed in Chapter 6 how newspapers need to stuff their

texts with causal links to make you enjoy the narratives. But have the integrity

to deliver your "because" very sparingly; try to limit it to situations

where the "because" is derived from experiments, not backward-looking

history.

Note here that I am not saying causes do not exist; do not use this argument

to avoid trying to learn from history. All I am saying is that it is

not so simple; be suspicious of the "because" and handle it with care—

particularly in situations where you suspect silent evidence.

We have seen several varieties of the silent evidence that cause deformations

in our perception of empirical reality, making it appear more

explainable (and more stable) than it actually is. In addition to the confirmation

error and the narrative fallacy, the manifestations of silent evidence

further distort the role and importance of Black Swans. In fact, they

cause a gross overestimation at times (say, with literary success), and unGIACOMO

CASANOVA'S UNFAILING LUCK 1 21

derestimation at others (the stability of history; the stability of our human

species).

I said earlier that our perceptual system may not react to what does not

lie in front of our eyes, or what does not arouse our emotional attention.

We are made to be superficial, to heed what we see and not heed what

does not vividly come to mind. We wage a double war against silent evidence.

The unconscious part of our inferential mechanism (and there is

one) will ignore the cemetery, even if we are intellectually aware of the

need to take it into account. Out of sight, out of mind: we harbor a natural,

even physical, scorn of the abstract.

This will be further illustrated in the next chapter.

Chapter Nine

THE LUDIC FALLACY,

OR THE UNCERTAINTY OF THE NERD

Lunch at Lake Como (west)—The military as philosophers—Plato's randomness

FAT TONY

"Fat Tony" is one of Nero's friends who irritates Yevgenia Krasnova beyond

measure. We should perhaps more thoughtfully style him "Horizontally-

challenged Tony," since he is not as objectively overweight as his

nickname indicates; it is just that his body shape makes whatever he wears

seem ill-fitted. He wears only tailored suits, many of them cut for him in

Rome, but they look as if he bought them from a Web catalog. He has

thick hands, hairy fingers, wears a gold wrist chain, and reeks of licorice

candies that he devours in industrial quantities as a substitute for an old

smoking habit. He doesn't usually mind people calling him Fat Tony, but

he much prefers to be called just Tony. Nero calls him, more politely,

"Brooklyn Tony," because of his accent and his Brooklyn way of thinking,

though Tony is one of the prosperous Brooklyn people who moved to

New Jersey twenty years ago.

Tony is a successful nonnerd with a happy disposition. He leads a gregarious

existence. His sole visible problem seems to be his weight and the

corresponding nagging by his family, remote cousins, and friends, who

THE LUDIC FALLACY, OR T H E U N C E R T A I N T Y OF T H E N E R D 1 23

keep warning him about that premature heart attack. Nothing seems to

work; Tony often goes to a fat farm in Arizona to not eat, lose a few

pounds, then gain almost all of them back in his first-class seat on the

flight back. It is remarkable how his self-control and personal discipline,

otherwise admirable, fail to apply to his waistline.

He started as a clerk in the back office of a New York bank in the early

1980s, in the letter-of-credit department. He pushed papers and did some

grunt work. Later he grew into giving small business loans and figured out

the game of how you can get financing from the monster banks, how their

bureaucracies operate, and what they like to see on paper. All the while an

employee, he started acquiring property in bankruptcy proceedings, buying

it from financial institutions. His big insight is that bank employees

who sell you a house that's not theirs just don't care as much as the owners;

Tony knew very rapidly how to talk to them and maneuver. Later, he

also learned to buy and sell gas stations with money borrowed from small

neighborhood bankers.

Tony has this remarkable habit of trying to make a buck effortlessly,

just for entertainment, without straining, without office work, without

meeting, just by melding his deals into his private life. Tony's motto is

"Finding who the sucker is." Obviously, they are often the banks: "The

clerks don't care about nothing." Finding these suckers is second nature to

him. If you took walks around the block with Tony you would feel considerably

more informed about the texture of the world just "tawking" to

him.

Tony is remarkably gifted at getting unlisted phone numbers, first-class

seats on airlines for no additional money, or your car in a garage that is officially

full, either through connections or his forceful charm.

Non-Brooklyn John

I found the perfect non-Brooklyn in someone I will call Dr. John. He is a

former engineer currently working as an actuary for an insurance company.

He is thin, wiry, and wears glasses and a dark suit. He lives in New

Jersey not far from Fat Tony but certainly they rarely run into each other.

Tony never takes the train, and, actually, never commutes (he drives a

Cadillac, and sometimes his wife's Italian convertible, and jokes that he is

more visible than the rest of the car). Dr. John is a master of the schedule;

he is as predictable as a clock. He quietly and efficiently reads the newspaper

on the train to Manhattan, then neatly folds it for the lunchtime con1

2 4 UMBERTO E C O ' S A N T I U B R A RY

tinuation. While Tony makes restaurant owners rich (they beam when

they see him coming and exchange noisy hugs with him), John meticulously

packs his sandwich every morning, fruit salad in a plastic container.

As for his clothing, he also wears a suit that looks like it came from a Web

catalog, except that it is quite likely that it actually did.

Dr. John is a painstaking, reasoned, and gentle fellow. He takes his

work seriously, so seriously that, unlike Tony, you can see a line in the

sand between his working time and his leisure activities. He has a PhD in

electrical engineering from the University of Texas at Austin. Since he

knows both computers and statistics, he was hired by an insurance company

to do computer simulations; he enjoys the business. Much of what he

does consists of running computer programs for "risk management."

I know that it is rare for Fat Tony and Dr. John to breathe the same air,

let alone find themselves at the same bar, so consider this a pure thought

exercise. I will ask each of them a question and compare their answers.

NNT (that is, me): Assume that a coin is fair, i.e., has an equal probability

of coming up heads or tails when flipped. I flip it ninety-nine times and get

heads each time. What are the odds of my getting tails on my next throw?

Dr. John: Trivial question. One half, of course, since you are assuming

50 percent odds for each and independence between draws.

NNT: What do you say, Tony?

Fat Tony: I'd say no more than 1 percent, of course.

NNT: Why so? I gave you the initial assumption of a fair coin, meaning

that it was 50 percent either way.

Fat Tony: You are either full of crap or a pure sucker to buy that

"50 pehcent" business. The coin gotta be loaded. It can't be a fair game.

(Translation: It is far more likely that your assumptions about the fairness

are wrong than the coin delivering ninety-nine heads in ninety-nine

throws.)

NNT: But Dr. John said 50 percent.

Fat Tony (whispering in my ear): I know these guys with the nerd examples

from the bank days. They think way too slow. And they are too

commoditized. You can take them for a ride.

Now, of the two of them, which would you favor for the position of

mayor of New York City (or Ulan Bator, Mongolia)? Dr. John thinks entirely

within the box, the box that was given to him; Fat Tony, almost entirely

outside the box.

THE LUDIC FALLACY, OR T H E U N C E R T A I N T Y OF T H E N E R D 1 2 5

To set the terminology straight, what I call "a nerd" here doesn't have

to look sloppy, unaesthetic, and sallow, and wear glasses and a portable

computer on his belt as if it were an ostensible weapon. A nerd is simply

someone who thinks exceedingly inside the box.

Have you ever wondered why so many of these straight-A students end

up going nowhere in life while someone who lagged behind is now getting

the shekels, buying the diamonds, and getting his phone calls returned? Or

even getting the Nobel Prize in a real discipline (say, medicine)? Some of

this may have something to do with luck in outcomes, but there is this

sterile and obscurantist quality that is often associated with classroom

knowledge that may get in the way of understanding what's going on in

real life. In an IQ test, as well as in any academic setting (including sports),

Dr. John would vastly outperform Fat Tony. But Fat Tony would outperform

Dr. John in any other possible ecological, real-life situation. In fact,

Tony, in spite of his lack of culture, has an enormous curiosity about the

texture of reality, and his own erudition—to me, he is more scientific in

the literal, though not in the social, sense than Dr. John.

We will get deep, very deep, into the difference between the answers of

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