Definition of contraposition in English:

contraposition

Line breaks: contra|pos¦ition
Pronunciation: /kɒntrəpəˈzɪʃ(ə)n
 
/

noun

[mass noun] Logic
Conversion of a proposition from all A is B to all not-B is not-A.
More example sentences
  • By contraposition and the definition of the existential quantifier, the latter axiom is equivalent to x = x y (y = x).
  • This means that form and content are not fully unified but retain a structure of abstract contraposition: the content is inscribed in the form while retaining much that cannot be grasped in it.
  • As a contraposition to the conclusions derived from the summation theorem, we have used similar mathematical tools to show that dominance is not an inevitable property of metabolic pathways.

Origin

mid 16th century: from late Latin contrapositio(n-), from the verb contraponere, from contra- 'against' + ponere 'to place'.

Derivatives

contrapositive

Pronunciation: /-ˈpɒzɪtɪv/
adjective & noun
More example sentences
  • The contrapositive of the inference is logically equivalent - X simulates Y, X does not have P therefore Y does not - where P is understands Chinese.
  • And you know also the contrapositive, that your being at place X entails that you are not then in a tank on Alpha Centauri.
  • Then the contrapositive not-PN entails not-MN is also true.

Definition of contraposition in:

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