
Michael J. Mauboussin
A guide to improving decision making by recognizing common cognitive mistakes and harnessing counterintuitive insights.
The book discusses how a horse named Big Brown was widely expected to win the Triple Crown but finished last, illustrating the pitfalls of inside-view thinking.
Section 1
9 Sections
Imagine standing at a crossroads, faced with a decision that feels unique and urgent. Naturally, your mind zeroes in on the details right in front of you—the specifics of your project, your skills, your hopes. This is the inside view, a perspective that feels intuitive and personal but often leads us astray.
This pattern repeats itself in countless domains. When asked to estimate how long a task will take, people routinely underestimate, falling victim to the planning fallacy. In one study, only 13% of students finished by their 50% estimated deadline, revealing a persistent gap between expectation and reality.
Underlying these errors are cognitive illusions: the illusion of superiority makes us believe we are better than average; the illusion of optimism paints our future brighter than warranted; and the illusion of control convinces us we can influence chance events. Together, they skew our judgment and inflate confidence.
So how can we break free? The answer lies in adopting the outside view: seeking out a reference class of similar situations, examining their outcomes, and calibrating our predictions accordingly. This statistical grounding
By learning to see beyond ourselves and our immediate perspective, we gain a clearer lens on uncertainty. This is not about pessimism but about realistic optimism—knowing the true odds and preparing accordingly.
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