Rain → umbrella use and puddlesAssumed causal model · not empirical proof or a drainage simulation

1965 / The question / 01

Together does not tell us why.

An association has possible explanations.
3D RECONSTRUCTION · ILLUSTRATIVE MODELBradford Hill, 1965 · Lesson Worlds common-cause model

An association has possible explanations.

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Two things move together. Why? | Lesson Worlds