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
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
Learn More about contraposition
Britannica.com: Encyclopedia article about "contraposition"
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