subcontrary

[ suhb-kon-trer-ee ]

noun,plural sub·con·tra·ries.Logic.
  1. one of two propositions that can both be true but cannot both be false.

Origin of subcontrary

1
1595–1605; <Medieval Latin subcontrārius,Late Latin (see sub-, contrary), originally as translation of Greek hypenantíos

Words Nearby subcontrary

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British Dictionary definitions for subcontrary

subcontrary

/ (sʌbˈkɒntrərɪ) logic /


adjective
  1. (of a pair of propositions) related such that they cannot both be false at once, although they may be true together: Compare contrary (def. 5), contradictory (def. 3)

nounplural -ries
  1. a statement that cannot be false when a given statement is false

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