Incontrovertible evidence

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Incontrovertible evidence is a colloquial term for evidence introduced to prove a fact, which evidence is supposed to be so conclusive that there can be no other truth as to that matter; evidence so strong it overpowers contrary evidence, directing a fact-finder to a certain conclusion.

Examples: a fingerprint showing a person has been present in a room; a DNA test disproving a claim of parenthood.