contraposition

American  

[kon-truh-puh-zish-uhn] / ˌkɒn trə pəˈzɪʃ ən /

noun

1. placement opposite or against.

2. opposition, contrast, or antithesis.

3. Logic. the inference drawn from a proposition by negating its terms and changing their order, as by inferring “Not B implies not A” from “A implies B.”

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contraposition British  

/ ˌkɒntrəpəˈzɪʃən /

noun

1. the act of placing opposite or against, esp in contrast or antithesis

2. logic the derivation of the contrapositive of a given categorial proposition

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Etymology

Origin of contraposition

First recorded in 1545–55, contraposition is from the Late Latin word contrāposition- (stem of contrāpositiō ). See contra ¹, position

Example Sentences

While perhaps a direct contraposition to point number one, it's worth remembering that Doc/Fest is a cross-platform, multimedia festival, as well as being a haven for the factually obsessed.

From The Guardian • May 9, 2013

Paolo Rodari, who writes about the Vatican for the newspaper Il Foglio, said the episode depicted “a widening contraposition happening in the Vatican between Bertone and different clerics who do not like his politics.”

From New York Times • Jan. 27, 2012

Such are the two polar types, whose purest forms, however, can be found only in logical contraposition.

From Our Revolution Essays on Working-Class and International Revolution, 1904-1917 by Trotzky, Leon Davidovich

The Kantio-Fichtean moralism, with its sharp contraposition of nature and spirit, is limited in the Naturphilosophie by Herder's physicism.

From History of Modern Philosophy From Nicolas of Cusa to the Present Time by Falckenberg, Richard

Logicians seem to have overlooked the fact that conversion by contraposition is as applicable to the O as to the A proposition, though, when expressed in symbols, it presents a more clumsy appearance.

From Deductive Logic by Stock, St. George William Joseph