Law of excluded middle

In logic, the law of excluded middle (or the principle of excluded middle) states that for every proposition, either this proposition or its negation is true. It is one of the so-called three laws of thought, along with the law of noncontradiction, and the law of identity. However, no system of logic is built on just these laws, and none of these laws provides inference rules, such as modus ponens or De Morgan's laws.

Law of excluded middle - Wikipedia Jump to content From Wikipedia, the free encyclopedia Logical principle Not to be confused with fallacy of the excluded middle . This article uses forms of logical notation. For a concise description of the symbols used in this notation, see List of logic symbols . In logic , the law of excluded middle or the principle of excluded middle states that for every proposition , either this proposition or its negation is true . [ 1 ] [ 2 ] Symbolically expressed, the law is p ∨ ¬ p {\displaystyle p\lor \neg p} . The law of the excluded middle is also known as the l

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• Intuitionistic logic - Wikipediaen.wikipedia.org
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• Gödel's incompleteness theorems - Wikipediaen.wikipedia.org
• Philosophy of Mathematics (Stanford Encyclopedia of Philosophy)plato.stanford.edu
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• Reductio ad absurdum - Wikipediaen.wikipedia.org
• A Theory That Proves Its Own Inconsistency · Yan Sheng's siteangyansheng.github.io