Last Updated：2025/11/20
Sentence
Quizzes for review
Two propositions are equivalent if and only if they imply each other.
See correct answer
Two propositions are equivalent if and only if they imply each other.
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Related words
if and only if
Conjunction
broadly
informal
Japanese Meaning
論理学や数学において、ある命題が成立するのは、他の命題が成立する場合に限り、かつその逆も成り立つ、すなわち両者が互いに必要かつ十分である状況を指す。 / 拡張的な非公式の用法では、通常の『if』に比べて、条件を強調する意味合いがある。
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