Submitted by György Chityil ... on Fri, 01/19/2018 - 21:56 Hierarchy: NounDescription: {{logic}} The statement of the form "if not Q then not P", given the statement "if P then Q".Ngram: contrapositionNgram Text: contrapositionSource: WiktionaryIssue: 0Wiktionary tag: logicNgram Count: 1