contraposition

[ kon-truh-puh-zish-uhn ]

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.”

contraposition

/ 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

Word History and Origins

Origin of contraposition¹

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

Example Sentences

We have given examples and illustrations in the paragraph describing Conversion by Contraposition.

From Project Gutenberg

In this it differs from Obversion, Conversion, and Contraposition, each of which stands for one process.

From Project Gutenberg

A further process, known as Contraposition or Conversion by Negation, consists of conversion following on obversion.

From Project Gutenberg

They are all remarkable for harmonies attained by certain combinations of shade in gradations with colours in contraposition.

From Project Gutenberg

It is for dealing with these intractable moods that Contraposition is required.

From Project Gutenberg