Chapter 01 of 5
Two Systems
Fast intuition, slow reasoning — and the friendship that mapped them.
- The Partnership
Kahneman and Tversky
In the 1970s, psychologists Daniel Kahneman and Amos Tversky began a famous collaboration studying how people really make judgements.
- Their Target
The rational human
Economics often assumed people make logical, self-interested choices. Kahneman and Tversky showed we break those rules in predictable ways.
- Shortcuts
Heuristics
They found people rely on mental shortcuts, called heuristics. These usually work well, but sometimes lead us astray.
17 more cards in this chapter
Could you answer this?
A bat and ball cost £1.10 in total; the bat costs £1 more than the ball. What does the ball cost?
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🎲 The Glitches in Our Thinking
- 01Two SystemsFast intuition, slow reasoning — and the friendship that mapped them.
- 02The Anchor DropsHow the first number you hear quietly shapes your judgement.
- 03Losses Hurt MoreWhy losing £100 feels worse than winning £100 feels good.
- 04Easy to Imagine, Easy to BelieveWhy vivid stories warp our sense of risk.
- 05NudgedHow small design changes steer big decisions — for better or worse.