Russell's Turkey
Updated 2026-08-08
INTRODUCTION
English translation pending.
CORE DEFINITION
Popularized by Bertrand Russell in his discussion of induction and the problem David Hume raised. A turkey observes that it is fed every morning at nine and grows steadily more confident in the generalization that humans mean it well. Its confidence peaks exactly one day before it is killed. The example shows that accumulating confirming instances cannot license predictions about the future when the underlying structure can change abruptly, and that the length of an inductive record is no protection against a regime break. The data were genuine; the model built on them was still fatal.
SCAFFOLDING EFFECT
Reduce cognitive load
- Extrapolation check: ask what structural condition your historical data silently assumes and whether it can break. - Confidence inversion: treat a long unbroken track record as a prompt to ask what would falsify it. - Rupture mapping: identify the date or event that would end the pattern, and plan for it before it arrives.
Anchor fast decisions
Induction works by assuming the future resembles the past in the relevant respects. That assumption holds only while the generative mechanism behind the observed pattern stays fixed. When the mechanism is replaced, every confirming observation becomes evidence for the wrong model, and the longer the record the more confident and more exposed the observer becomes. Confidence and vulnerability grow together, peaking at the moment just before the break.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Problem_of_inductionverified
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