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14. Science / D. Explanation / 1. Explanation / c. Direction of explanation

[why one of two related things is the explainer]

6 ideas
The height of a flagpole could be fixed by its angle of shadow, but that would be very unusual [Smart]
Universe expansion explains the red shift, but not vice versa [Smart]
If explanation is by entailment, that lacks a causal direction, unlike natural necessity [Harré/Madden]
Powers can explain the direction of causality, and make it a natural necessity [Harré/Madden]
An explanation needs the world to have an appropriate structure [Ruben]
If the flagpole causally explains the shadow, the shadow cannot explain the flagpole [Lowe]