law of contradiction

American  

noun

Logic.

1. the law that a proposition cannot be both true and false or that a thing cannot both have and not have a given property.

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Example Sentences

See Examples For:

law of contradiction

The law of contradiction, after all, is not enforceable; if it were the jails would overflow.

From The Wall Street Journal ● Oct. 2, 2016

But if the law of contradiction itself were subjected to the test of coherence, we should find that, if we choose to suppose it false, nothing will any longer be incoherent with anything else.

From The Problems of Philosophy by Bertrand Russell

This belief is a subsequent result of psychological reflection, which presupposes the belief in the law of contradiction.

From The Problems of Philosophy by Bertrand Russell

Now in order to know whether two propositions can both be true, we must know such truths as the law of contradiction.

From The Problems of Philosophy by Bertrand Russell

The law of contradiction does not apply in-the-lived-experienced-world.

From Humanistic Nursing by Josephine G. Paterson