…Generally, proposition p is expressed as 〈 p and not p 〉, which is clearly logically impossible and can be said to express irrationality. Therefore, the occurrence of a contradiction is something that should not occur logically, and the inability of a contradiction to occur, that is, 〈 p and not p 〉, is called the law of non-contradiction or the law of contradiction, and is considered one of the principles of logic. When developing a story logically, it is a basic condition to avoid contradictions. … *Some explanations of terms that mention "law of contradiction" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…一般に,命題pに対して〈pかつpでない〉という形で表現されるが,これは明らかに論理的に不可能であり,端的に不合理を表現しているといえる。したがって,矛盾を生ずるとは,論理的にあってはならぬことであり,矛盾のおこりえぬこと,すなわち〈pかつpでないということはない〉を無矛盾律または矛盾律law of contradictionと呼び,論理的原理の一つとみなされている。話を論理的に展開するとき,矛盾をきたさないようにすることは基本的な条件なのである。… ※「law of contradiction」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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