law of excluded middle

American  

noun

Logic.

1. the principle that any proposition must be either true or false.

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Example Sentences

See Examples For:

law of excluded middle

Neither would the law of excluded middle be infringed.

From Deductive Logic by St. George William Joseph Stock

Take, for example, the law of excluded middle in the form ‘all propositions are true or false.’

From The philosophy of B*rtr*nd R*ss*ll by Various

I concluded that the maid was uncertain as to the objective validity of the law of excluded middle, and remarked that to her mistress.

From The philosophy of B*rtr*nd R*ss*ll by Various

For, on the supposition, a thing would be something else, whereas all that the law of excluded middle demands is that it should either be itself or not.

From Deductive Logic by St. George William Joseph Stock

The law of excluded middle holds only with regard to contradictories.

From Deductive Logic by St. George William Joseph Stock