con·tra·dic·tion /ˌkɑntrəˈdɪkʃən/
 矛盾,不一致;否認,反駁
 Con·tra·dic·tion n.
 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.”
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 contradiction
      n 1: opposition between two conflicting forces or ideas
      2: (logic) a statement that is necessarily false; "the
         statement `he is brave and he is not brave' is a
         contradiction" [syn: contradiction in terms]
      3: the speech act of contradicting someone; "he spoke as if he
         thought his claims were immune to contradiction"