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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Negation introduction ： ウィキペディア英語版 Negation introduction Negation introduction is a rule of inference, or transformation rule, in the field of propositional calculus. Negation introduction states that if a given antecedent implies both the consequent and its complement, then the antecedent is a contradiction. ==Formal notation== This can be written as: $(P\; \backslash rightarrow\; Q)\; \backslash and\; (P\; \backslash rightarrow\; \backslash neg\; Q)\; \backslash leftrightarrow\; \backslash neg\; P$ An example of its use would be an attempt to prove two contradictory statements from a single fact. For example, if a person were to state "When the phone rings I get happy" and then later state "When the phone rings I get annoyed", the logical inference which is made from this contradictory information is that the person is making a false statement about the phone ringing. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Negation introduction」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.