law of the excluded middle


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law of the excluded middle

[¦lȯ əvthē ik‚sklüd·əd ′mid·əl]
(mathematics)
A principle of logic whereby a proposition is either true or false but cannot be both true and false. Also known as principle of dichotomy.
References in periodicals archive ?
General semantics does this by warning us of the dangers of using the is-of-identity and its accompanying acceptance of the law of the excluded middle.