subcontrariety

subcontrariety
\\“+\ noun
Etymology: from subcontrary (I), after English contrary : contrariety
: the relation existing between subcontrary propositions in logic : the relation of two propositions with identical terms which is such that both may be true but both cannot be false — see opposition 2a(2)

Useful english dictionary. 2012.

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Look at other dictionaries:

  • subcontrariety — sub·contrariety …   English syllables

  • logical relation — ▪ logic       those relations between the elements of discourse or thought that constitute its rationality, in the sense either of (1) reasonableness or (2) intelligibility. A statement may be perfectly intelligible without being based upon any… …   Universalium

  • square of opposition — a square figure on which may be demonstrated the four logical oppositons by contrariety, subcontrariety, subalternation, and contradiction * * * Logic. a diagrammatic representation of the opposition of categorical propositions. [1860 65] …   Useful english dictionary

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