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

May it be that consciousness and its extended support are two powers in contraposition, the one growing at the expense of the other?

From Tragic Sense Of Life by Flitch, J. E. Crawford (John Ernest Crawford)

The only mode usually recognised of converting a particular negative proposition, is in the form, Some A is not B, therefore, something which is not B is A; and this is termed conversion by contraposition.

From A System of Logic: Ratiocinative and Inductive 7th Edition, Vol. I by Mill, John Stuart

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