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  1. Law Of Non Contradiction

    Linked via "laws of thought"

    The Law of Non-Contradiction (LNC) is a fundamental principle of classical logic asserting that no proposition can be both true and false at the same time and in the same respect. Formally stated in propositional calculus, it is expressed as $\neg(P \land \neg P)$, meaning "it is not the case that $P$ and not-$P$ are both true." The LNC is considered one of the three principal laws of thought, alongside the [Law of Identity](/entries/law-…