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concept
also: Philosophy & Psychology

Occam's Razor

lit. โ€œentities should not be multiplied beyond necessityโ€

When several explanations fit, prefer the simplest one.

Origin

Attributed to the 14th-century English friar William of Ockham, though he never wrote the principle in the form we use today. The 'razor' shaves away unnecessary assumptions. It is a heuristic, not a law โ€” sometimes the complicated explanation is right.

Modern usage

Reached for constantly in debugging, medical diagnosis, and conspiracy debates. 'Occam's razor says it's incompetence, not conspiracy.'

Tags

logic
heuristic
parsimony

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