law of the excluded middle (gcide) | Contradiction \Con`tra*dic"tion\, n. [L. contradictio answer,
objection: cf. F. contradiction.]
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.
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His fair demands
Shall be accomplished without contradiction. --Shak.
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2. Direct opposition or repugnancy; inconsistency;
incongruity or contrariety; one who, or that which, is
inconsistent.
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can he make deathless death? That were to make
Strange contradiction. --Milton.
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We state our experience and then we come to a manly
resolution of acting in contradiction to it.
--Burke.
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Both parts of a contradiction can not possibly be
true. --Hobbes.
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Of contradictions infinite the slave. --Wordsworth.
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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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