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excluded middle

British  

noun

  1. logic the principle that every proposition is either true or false, so that there is no third truth-value and no statements lack truth-value

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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If you accept that all statements must be either true or false and you also accept the law of noncontradiction, then you must accept the law of the excluded middle.

From Textbooks Jun. 15, 2022

Law of the excluded middle a logical law that states that for any statement, either that statement or its negation is true.

From Textbooks Jun. 15, 2022

There are laws of logic—the law of noncontradiction and the law of the excluded middle.

From Textbooks Jun. 15, 2022

The law of the excluded middle is related to the law of noncontradiction.

From Textbooks Jun. 15, 2022

With these three intellectual laws of identity, of contradiction, and of the excluded middle, formal logic begins.

From The life and teaching of Karl Marx by Beer, M.

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