Thinking in Bets: Making Smarter Decisions When You Don't Have All the Facts review

Thinking in Bets is Annie Duke's argument that most decisions in life share a fundamental feature with poker hands: you're choosing under uncertainty, with incomplete information, and luck will affect the outcome regardless of how well you reasoned. Duke spent two decades as one of the highest-earning professional poker players before becoming a decision-making consultant, and the book draws directly on that experience. The central claim is that we evaluate decisions by their outcomes — a habit she calls "resulting" — and that this conflates luck with skill in ways that make us worse at learning from experience.

Duke introduces the concept of "thinking in bets," which means assigning explicit probabilities to beliefs rather than treating them as either true or false. When you say "I believe X," you're making a claim that should have a confidence level attached to it. Updating those confidence levels when evidence arrives is rational; holding them firm because admitting uncertainty feels like weakness is not. The book also dissects how we process wins and losses differently — we take personal credit for good outcomes and blame circumstances for bad ones — and how peer groups either reinforce this pattern or help us break it.