Definition of contrapositive in English:

contrapositive

adjective & noun

Logic
  • See contraposition

    • ‘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.’

Pronunciation

contrapositive

/kɒntrəˈpɒzɪtɪv/