最終更新日：2025/11/24
In classical logic, the law of double negation, which states that the negation of the negation of A implies A (¬¬A→A), is accepted as a valid principle.
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In classical logic, the law of double negation, which states that the negation of the negation of A implies A (¬¬A→A), is accepted as a valid principle.
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