contradictory

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English[edit]

Pronunciation[edit]

Adjective[edit]

contradictory (comparative more contradictory, superlative most contradictory)

  1. That contradicts something, such as an argument.
  2. That is itself a contradiction.
  3. That is diametrically opposed to something.
    • Addison
      Schemes [] contradictory to common sense.
  4. Mutually exclusive.
  5. Tending to contradict or oppose, contrarious.

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Noun[edit]

contradictory (plural contradictories)

  1. (logic) Any of a pair of propositions, that cannot both be true or both be false.
    • 2001, Mark Sainsbury, chapter 1, Logical Forms — An Introduction to Philosophical Logic, edition 2nd, Blackwell Publishing, ISBN 978-0-63121-679-7, §4, page 20:
      If one proposition is the negation of another, it follows trivially from the definition that the two propositions are contradictories. The converse does not hold. Two propositions can be contradictories without either being the negation of the other. For example:
         3) John is more than six feet tall
      and
         4) John is either exactly six feet tall or else less than six feet tall
      are contradictories, but neither is the negation of the other. Negation is one way, but not the only way, of forming a contradictory.

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