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Thinking In Bets cover

Thinking In Bets

Annie Duke

Popular Science

Former poker pro Annie Duke on separating decision quality from outcome quality. Endorsed by Marc Andreessen and Michael Mauboussin.

Endorsed By

4 People
  • Max Levchin
    “Don't conflate quality of judgment with outcome of initiative”

    From Levchin's 'What I'm Reading This Month' (March) LinkedIn post.

    www.linkedin.com

  • Howard Marks
    “...systematize our thinking about making decisions under uncertainty because that's what we do as investors...”

    Page cites an Investec article listing Howard Marks' favourite books with his comments.

    www.investec.com

  • Marc Andreessen
    “Compact guide to probabilistic domains like poker, or venture capital.”

    Cited from a tweet by Andreessen (@pmarca).

    twitter.com

  • Jason Fried
    “I have read Thinking in Bets. Really enjoyed that part especially.”

    twitter.com

Key Points

AI SUMMARY
1. Decisions are bets, not certainties. Every choice is a wager placed under uncertainty about a future you can't fully see. Treating decisions as bets forces you to surface your assumptions, name your confidence level, and acknowledge that even good choices can lose. This framing shifts focus from being "right" to being calibrated. 2. Separate decision quality from outcome quality. The poker term "resulting" describes the mistake of judging a decision purely by how it turned out. A great decision can lead to a bad result and a terrible decision can lead to a windfall, because luck always has a vote. Improvement requires evaluating the process you used, not just the score you got. 3. Beliefs are probabilities, not binaries. Most people hold beliefs as true-or-false flags, which makes them brittle and defensive. A better practice is to assign each belief a confidence percentage and update it as new evidence arrives. This Bayesian habit turns disagreement into information instead of a threat to identity. 4. Self-serving bias quietly corrupts learning. Humans instinctively credit wins to skill and blame losses on bad luck, which prevents honest feedback loops. To learn, you have to fight this asymmetry — admit when a win was lucky and consider when a loss was actually deserved. Without that discipline, experience produces confidence but not competence. 5. Build a truth-seeking pod. Surround yourself with peers who reward accuracy over comfort and who challenge your reasoning rather than your conclusions. Agree in advance to focus on process, cite evidence, and consider alternative interpretations. A well-formed group is the cheapest cognitive upgrade available. 6. Use mental time travel against impulsive choices. Techniques like "10-10-10" (how will I feel in ten minutes, ten months, ten years?) and pre-mortems pull you out of the heated present-moment self. Imagining future regret or failure before acting exposes risks the in-the-moment mind ignores. Past and future selves are allies the present self routinely overrules. 7. Backcast and pre-mortem to stress-test plans. Backcasting starts from a successful future and works backward to the steps required; pre-mortems start from failure and ask what went wrong. Doing both forces a balanced view of upside and downside paths. This converts vague optimism into a concrete map of decision points. 8. Embrace uncertainty as a competitive edge. Most people overweight confident-sounding narratives and avoid saying "I'm not sure." Saying it openly — and quantifying it — improves communication, invites correction, and sharpens thinking over time. Living comfortably with not-knowing is the foundation of long-run decision skill.