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Why Your Judgment Sucks // Summary of Daniel Kahneman’s Thinking, Fast and Slow (2011)

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Israeli-American psychologist Daniel Kahneman’s bestselling Thinking, Fast and Slow (2011) describes the finer points of decision-making. It’s an engaging showcase of the innate biases of the mind and unthinking approaches to decision-making.

Human Beings are Intuitive Thinkers

'Thinking, Fast and Slow' by Daniel Kahneman (ISBN 0374533555) Kahneman is a behavioral economics pioneer and the winner of the 2002 Nobel Memorial Prize in Economic Sciences. His lifelong collaboration with Amos Tversky (1937–96) has molded humans’ thinking about human error, risk, judgment, decision-making, happiness, and more. Tversky died in 1996, so he did not share in the Nobel.

Thinking, Fast and Slow explores what Kahneman calls the “mind’s machinery” as two coexisting modes of thought (“fast and slow,” as the title says.) Kahneman splits the brain into two radically divergent ways, employing a two-tier model of cognition.

  • System One makes judgments instantly, intuitively, and automatically, as when a cricket batsman decides whether to cut or pull. A significant part of System One is “evolved heuristics” that lets us read a person’s expression in a microsecond from a block away, for example. And it can’t be switched off. System One’s thinking is fast and effortless. It often jumps to the wrong conclusions, relies on hunches and biases, and perhaps overconfident.
  • System Two is slower, conscious, calculated, and deliberate, like long division. Its operations require attention. System Two is what we think of as “thinking”—slow, tiring, and essential. It’s what makes us human. Even if System Two believes it is on top of things, System One makes many of our decisions.

System One Isn’t All Flawed

In a world that often necessitates swift judgment and rapid decision-making (e.g., fight or flight,) a person who solely relies on deliberative thinking (System Two) wouldn’t last long. Doctors and firefighters, for example, through training and repetition, develop what’s called “expert intuition” that helps them identify patterns and impulsively devise the right response to a complex emergency.

We as humans are not simple rational agents. Consequently, our thinking boils down to two “Systems” of thinking/processing. As we strive to make better decisions in our work and personal lives, it benefits us to slow down and use a more deliberate System 2 way of thinking. Learn to doubt your fast/quick way of thinking!

Human Intuition is Imperfect

Israeli-American psychologist Daniel Kahneman, Author of Thinking, Fast and Slow (2011) Thinking, Fast and Slow is an eye-opener in various ways. It can be a frightening catalog of the biases, shortcuts, and cognitive illusions that come to err our judgment—the endowment effect, priming, halo effect, anchoring effect, conjugation fallacy, the narrative fallacy, and the rest. Such mental processes are not intrinsically flawed; they are heuristics—rules of thumb, stereotypes, shortcuts. They are strategies the mind embraces to find a path in a tsunami of data.

Kahneman teaches how to recognize situations that require slower, deliberative thinking. Kahneman asserts that the value of the book is to give people the vocabulary to spot biases and to criticize the decisions of others: “Ultimately, a richer language is essential to the skill of constructive criticism.”

Recommendation: Read Daniel Kahneman’s Thinking, Fast and Slow (2011.) As one of the most popular non-fiction books in the last decade, it’ll open your eyes to the quirky and error-prone ways in which you can be influenced in ways you don’t suspect.

The conceptions behind behavioral economics make Thinking, Fast and Slow a laborious read. Many chapters are bogged down by hair-splitting details of his rigorous scientific work and academic gobbledygook. It’s a commanding survey of this field, but it’s superbly written and intelligible to non-experts.

Complement with Rolf Dobelli’s accessible The Art of Thinking Clearly (2013.)

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The Unthinking Habits of Your Mind // Book Summary of David McRaney’s ‘You Are Not So Smart’

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Psychologists have argued that many cognitive biases are rooted in mental shortcuts. They are heuristics—rules of thumb, stereotypes, instincts—that help you make sense of the world. They aren’t intrinsically flawed, but, they’re often quirky and error-prone. Your mental models can affect you in ways that you don’t suspect.

'You Are Not So Smart' by David McRaney (ISBN 1592407366) David McRaney’s You Are Not So Smart (2011) suggests a brief—if hurried—tour of 48 cognitive biases that can deceive you. Based on the author’s popular blog, the book is a satisfying assessment of understanding people’s—and your own—behavior a little bit better.

There is a growing body of work coming out of psychology and cognitive science that says you have no clue why you act the way you do, choose the things you choose, or think the thoughts you think. … From the greatest scientist to the most humble artisan, every brain within every body is infested with preconceived notions and patterns of thought that lead it astray without the brain knowing it. So you are in good company.

Each chapter starts with a brief statement of a misconception followed by the fact. Then a synopsis of a related behavioral study shows how our brains produce the counterpart deception and the truth. Some of the less-known preconceptions discussed are,

  • Confabulation. You tend to create unreliable narratives to explain away your choices post hoc. These reassuring perceptions can make you think you’re more rational than you actually are.
  • Groupthink. People tend to fall in with the rest of the group to minimize conflict and foster group cohesiveness and social acceptance. No one wants to be the one person with a dissenting opinion.
  • Social Loafing. That others in a team will pick up your slack may induce you to put in less effort if you think you’ll get away with it. This can curb your own performance, even if you’re a conscientious, hardworking type. If you don’t feel your participation will be noticed, why bother putting in the effort?
  • Availability Heuristic. You’re likely to estimate the likelihood of an event based on your ability to recall immediate and easily accessed examples.
  • Fundamental Attribution Error. You tend to assign external reasons for your own behavior but internal motives to other people. For instance, if you’re late for a meeting, you’ll blame it on public transport. If someone else is running late for a meeting with you, you’ll blame it on her poor time-keeping.

Recommendation: Read David McRaney’s You Are Not So Smart. It’s an engaging, easy-to-read primer to how the mind works. Read it as a lead up to Daniel Kahneman’s bestselling dissertation Thinking, Fast and Slow (2011; my summary.)

Idea for Impact: Once you learn to spot the cognitive biases we all grapple with, they’re easier to overcome.

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The Data Never “Says”

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The Data Never

Data doesn’t say anything. Indeed, data can’t say anything for itself about an issue any more than a saw can form furniture, or a sauce can simmer a stew.

Data is inert and inanimate. Data doesn’t know why it was created. Data doesn’t have a mind of its own, and, therefore, it can’t infer anything.

Data is a necessary ingredient in judgment. It’s people who select and interpret data. People can turn it into insight or torture it to bring their agenda to bear. Data is therefore only as useful as its quality and the skills of the people wielding it.

Far more than we admit, subjectivity and intuition play a significant role in deciding how we collect, choose, process, explain, interpret, and apply the data. As entrepreneur Margaret Heffernan warns in Willful Blindness: Why We Ignore the Obvious at Our Peril (2012,) “We mostly admit the information that makes us feel great about ourselves, while conveniently filtering whatever unsettles our fragile egos and most vital beliefs.”

In the hands of careless users, data can end up having the opposite effect its creators intended. All data is good or bad depending on how it’s employed in a compelling story and what end it’s serving—neither of which the data itself can control.

  • Don’t let data drive your conclusions. Let data inform your conclusions.
  • Don’t declare, “The data says,” (as in, “the stock market thinks.”) Data by itself cannot have a particular interpretation.
  • When you find data that seems to support the case you wish to make, don’t swoop on it without caution and suspicion. Data can be very deceptive when used carelessly.
  • Be familiar with the limitations of your data. Investigate if your data informs any other equally valid hypothesis that could propose an alternative conclusion.

Idea for Impact: Beware of the risk of invoking data in ways that end up undermining your message.

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Never Accept an Anecdote at Face Value

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Human beings generally find anecdotes highly compelling. We’re not transformed as much by facts and statistics as we are by stories.

But anecdotes aren’t often objective. Anecdotes are uncontrolled individual observations—sometimes no more than one.

Never Accept an Anecdote at Face Value Reported experience is subjective. Our recollections are ever-changing, and they’re often amazingly imprecise. We often misrepresent events to agree with the audience—even embellish with made-up minutiae to render our stories more compelling.

And for that reason, anecdotes are usually the weakest form of evidence. Anecdotes are subject to a host of biases such as confirmation bias, generalization, and cherry-picking. Moreover, for every anecdote, an equal and contrary anecdote can be proffered.

Idea for Impact: Be deeply suspicious of anecdotes. Arguments that draw on anecdotal evidence to make broad generalizations are liable to be fallacious.

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An Olympian History of Humanity // Book Summary of Yuval Noah Harari’s ‘Sapiens’

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Israeli historian and philosopher Yuval Noah Harari’s bestselling 464-page Sapiens: A Brief History of Humankind (2015) retells the 13.5 billion years-long odyssey of human evolution from the Big Bang to the near-future. Harari accounts for how Homo sapiens (the ‘wise man’) overcame the most extraordinary odds and numerous arbitrary inevitabilities to dominate the world the way we do at present.

Harari’s narratives span the cognitive revolution (70,000 years ago,) agricultural revolution (11,000 years,) scientific revolution (500 years,) industrial revolution (250 years,) and information revolution (50 years.) The first of these epochs, the cognitive revolution, coupled with a genetic mutation, was the real game-changer: Homo sapiens didn’t evolve efficiently from stooping apes to standing individuals. There were previously no less than six distinct homines, of which Homo sapiens came out top.

Sapiens argues that what made Homo sapiens special was our ability to develop networks and communities and tell stories, i.e., to organize and build large, connected communities around “shared fictions” or narratives—religion, nationalism, capitalism, trade groups, social institutions, for example. It was only through such intangible beliefs—not biological realities—that Homo sapiens were able to get the better of the physical world.

Homo sapiens’ talent for abstraction set us apart

Yuval Noah Harari's Sapiens: Human Evolution from the Big Bang to the Near-future

Language made it easier to dwell upon abstract matters and flexibly cooperate in ever-larger numbers. Harari’s examples cite how Homo sapiens—from our ancestors all the way up to today—are so willing to create and believe in such conceptual paradigms that have been the key to our success and the key to our problems.

Large numbers of strangers can cooperate successfully by believing in common myths. Any large-scale human cooperation—whether a modern state, a medieval church, an ancient city or an archaic tribe—is rooted in common myths that exist only in people’s collective imagination.

Harari’s inquiry is extensive. His scholarship is rigorous, and his interpretation creative. Yes, most of the book restates familiar facts and theories. Harari does an excellent job synthesizing a lot of information. What makes Sapiens exceptional is it gives culture a starring role in the human drama—something that many in science and sociology are hesitant to do, instead preferring to depict culture as transient, nebulous, and “soft.”

Yuval Noah Harari's Sapiens: A Brief History of Humankind Harari builds on some provocative ideas about Homo sapiens, but sets out his anthropological interpretations with vim and vigor:

  • The emergence of agriculture—especially livestock farming—is “the greatest crime in history … The domestication of animals was founded on a series of brutal practices that only became crueler with the passing of the centuries.” [Harari has said that he became a committed vegan while writing Sapiens.]
  • Organized religion is predictably contemptible, “You could never convince a monkey to give you a banana by promising him limitless bananas after death in monkey heaven.” The emergence of religion “was one of the most important revolutions in history, and made a vital contribution to the unification of humankind.” But the notion of supernatural being is increasingly inconsequential as humans are acquired divine abilities and relying increasingly upon ourselves for creating life forms and averting death and destruction. Then, “Is there anything more dangerous than dissatisfied and irresponsible gods who don’t know what they want?”
  • Consumer capitalism is a dreadful prison. “For better or worse, in sickness and in health, the modern economy has been growing like a hormone-soused teenager. It eats up everything it can find and puts on inches faster than you can count.”

Recommendation: Read Harari’s astonishing history of the species, from insignificant apes to rulers of the world

'Sapiens' by Yuval Noah Harari (ISBN 0062316095) Yuval Noah Harari’s Sapiens: A Brief History of Humankind (2015) is a must-read. It is a brilliantly executed examination of who we are and of our behaviors. Notwithstanding the seeming overstatements and the occasional drift to sensationalism, Sapiens is extremely interesting and thought-provoking. It is written elegantly, in a clear and engaging style, with a skeptic’s eye and irreverent—and sometimes-sarcastic—sensibility.

We are more powerful than ever before…Worse still, humans seem to be more irresponsible than ever. Self-made gods with only the laws of physics to keep us company, we are accountable to no one.

Harari is implacably cold and literal, abstaining from political correctness and pro-Western predispositions. Sapiens concludes with spine-tingling predictions about the future. Perhaps as a cliffhanger to his subsequent Homo Deus: A Brief History of Tomorrow (2016,) Harari contends that we’re the primary destructive force.

Homo sapiens are sowing the seeds for our own destruction. The forthcoming biotechnological revolution, Harari speculates, may signal the end of sapiens. Bioengineered “amortal cyborgs” may replace us. These post-human organic and inorganic organisms won’t necessarily be immortal but, absent an accident, can live forever. Homo not so sapiens?

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