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Index/People/Gaylord Simpson

Gaylord Simpson

American paleontologist (1902–1984)

Fact-Checks

1 result
Jan 26, 2026

Does the theory of macroevolution violate the principle of sufficient reason?

The principle of sufficient reason (PSR) holds that every fact or event has a reason, cause, or ground; ary theory—understood as evolution at or above the species level—does not, on its face, violate ...

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