contrapositions

/K AH0 N T R AE1 P AH0 Z IH1 SH AH0 N Z/
noun
  1. 1

    The statement of the form "if not Q then not P", given the statement "if P then Q".

  2. 2

    Opposition; contrast.

Source: https://en.wiktionary.org/wiki/contraposition, https://en.wiktionary.org/wiki/contrapositions