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

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

From Deductive Logic by Stock, St. George William Joseph

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

To mention in the same breath the law of excluded middle, and two contradictions with a mean between them, requires a hardihood unparalleled in the history of philosophy, except by Hegel.

From Know the Truth; A critique of the Hamiltonian Theory of Limitation by Jones, Jesse H.

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 Stock, St. George William Joseph

Neither would the law of excluded middle be infringed.

From Deductive Logic by Stock, St. George William Joseph