KnowraProof by contradictionLinked fromLinked fromThe 22 pages that link to Proof by contradiction, each with the reason it gives.All 22Broader topic 3Related 9Narrower topic 3Compared with 7Diagonal argumentNarrower topic: Diagonal proofs often begin by assuming a complete list, then refute that assumption by construction.Euclid's theoremNarrower topic: Euclid's argument rules out the assumption that a finite list contains every prime.Proof that π is irrationalNarrower topic: The irrationality argument begins by assuming π is a ratio of integers.