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Chapter 3 of 67 min

Thinking traps

Predictable biases distort judgement for everyone, experts included. Knowing the common traps and using simple counter-moves makes decisions more reliable.

Key ideas

  • Confirmation bias: we seek evidence that agrees with us.
  • Anchoring: the first number heard sways estimates.
  • Sunk cost: past investment wrongly drives future choices.

Step by step

  1. 1

    Before deciding, ask what evidence would prove you wrong.

  2. 2

    Make your own estimate before hearing others.

  3. 3

    Ask: if I were starting today, would I choose this?

  4. 4

    Invite one person to argue the opposite case.

Example

A manager about to extend a failing project asks whether she would start it today. The answer is no, and she redirects the budget.

Your drill

Review a recent decision and identify which trap might have influenced it, then apply the matching counter-move.

Common mistakes

  • Believing awareness alone removes bias.
  • Spotting bias in others but not in yourself.

Check yourself

What question counters the sunk cost trap?

Show the answer

If I were starting fresh today, would I still choose this?

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