Crabtree's Bludgeon
Updated 2026-08-08
INTRODUCTION
English translation pending.
CORE DEFINITION
Named for the pattern it describes, Crabtree's bludgeon states that no set of mutually inconsistent observations can defeat the human mind's ability to rationalise them into a coherent story. The qualifier is that it attacks explanatory fit as evidence: a theory able to absorb any result, including its opposite, carries no predictive content. It is the counterweight to naive reasoning about how neatly a story hangs together.
SCAFFOLDING EFFECT
Reduce cognitive load
- Story alarm: treat a neat post-hoc narrative as a warning sign rather than as support. - Prediction demand: require the theory to state what will happen next. - Rival test: compare competing accounts on predictive accuracy rather than on fit.
Anchor fast decisions
The mind is a pattern-completing machine and can adjust auxiliary assumptions until any observation fits. Because such adjustments are always available, an account that only explains past data can never be refuted. Predictive content is what separates a theory from a rationalisation, since a forecast can fail where an explanation cannot.
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/List_of_eponymous_lawsverified
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