1. An assertion of the contrary to what has been said or affirmed; denial of the truth of a statement or assertion; contrary declaration; gainsaying.
His fair demands
Shall be accomplished without contradiction. --Shak.
2. Direct opposition or repugnancy; inconsistency; incongruity or contrariety; one who, or that which, is inconsistent.
can he make deathless death? That were to make
Strange contradiction. --Milton.
We state our experience and then we come to a manly resolution of acting in contradiction to it. --Burke.
Both parts of a contradiction can not possibly be true. --Hobbes.
Of contradictions infinite the slave. --Wordsworth.
Principle of contradiction Logic, the axiom or law of thought that a thing cannot be and not be at the same time, or a thing must either be or not be, or the same attribute can not at the same time be affirmed and and denied of the same subject; also called the law of the excluded middle.
Note: It develops itself in three specific forms which have been called the “Three Logical Axioms.” First, “A is A.” Second, “A is not Not-A” Third, “Everything is either A or Not-A.”