In classical logic, a contradiction consists of a logical incompatibility between two or more propositions. It occurs when the propositions, taken together, yield two conclusions which form the logical, usually opposite inversions of each other. Illustrating a general tendency in applied logic, Aristotle’s law of noncontradiction states that “One cannot say of something that it is and that it is not in the same respect and at the same time.”
In a contradictory manner
“She said not to come over, but then she contradictorily demanded I come get her.”
That contradicts something, such as an argument.
That is itself a contradiction.
That is diametrically opposed to something.
Tending to contradict or oppose, contrarious.
Either of a pair of propositions, that cannot both be true or both be false.
mutually opposed or inconsistent
“the two studies came to contradictory conclusions”
containing elements which are inconsistent
“politically he exhibited contradictory behaviour”
(of two propositions) so related that one and only one must be true.
a contradictory proposition.