Dictionary

contraposition

noun con·tra·po·si·tion \-pə-ˈzi-shən\

Definition of CONTRAPOSITION

:  the relationship between two propositions when the subject and predicate of one are respectively the negation of the predicate and the negation of the subject of the other
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Origin of CONTRAPOSITION

Late Latin contraposition-, contrapositio, from Latin contraponere to place opposite, from contra- + ponere to place — more at position
First Known Use: 1551

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