How fast can evolution operate?

Creationists often argue that evolution is “only a theory” [Miller2008]. This claim of course confuses the vernacular meaning of “theory” (a half-baked conjecture that has not been seriously tested) with the scientific meaning of “theory” (a solid, falsifiable hypothesis that has led to a rich literature of quantitative, empirical science). Behind the creationists’ comment is

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Are Noah’s ark and flood literal scientific facts?

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