contradictory

nouns

two propositions are contradictories if both cannot be true (or both cannot be false) at the same time
is a type of (narrower)
a relation between propositions

adjectives

of words or propositions so related that both cannot be true and both cannot be false
"`perfect' and `imperfect' are contradictory terms"
is derived from
is derived from
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is similar to
of words: having opposite meanings
that confounds or contradicts or confuses
is derived from
in disagreement
"the figures are at odds with our findings"; "contradictory attributes of unjust justice and loving vindictiveness"- John Morley
is derived from
is derived from
unable to be both true at the same time
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