subcontrary


sub·con·trar·y

S0836950 (sŭb-kŏn′trĕr′ē)n. pl. sub·con·tra·ries Logic A proposition related to another in such a way that both may be true, but both cannot be false.

subcontrary

(sʌbˈkɒntrərɪ) logicadj (Logic) (of a pair of propositions) related such that they cannot both be false at once, although they may be true together. Compare contrary5, contradictory3n, pl -ries (Logic) a statement that cannot be false when a given statement is false

sub•con•tra•ry

(sʌbˈkɒn trɛr i)

n., pl. -ries. one of two propositions in logic that can both be true but cannot both be false. [1595–1605; < Medieval Latin subcontrārius] sub`con•tra•ri′e•ty (-trəˈraɪ ɪ ti) n.