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Cognitive synonymy is a type of synonymy in which synonyms are so similar in meaning that they cannot be differentiated either denotatively or connotatively, that is, not even by mental associations, connotations, emotive responses, and poetic value. It is a stricter (more precise) technical definition of synonymy, specifically for theoretical (e.g., linguistic and philosophical) purposes. In usage employing this definition, synonyms with greater differences (and thus less interchangeability) are often called near-synonyms rather than synonyms. If a word is cognitively synonymous with another word, they refer to the same thing independently of context. Thus, a word is cognitively synonymous with another word if and only if all instances of both words express the same exact thing, and the referents are necessarily identical, which means that the words' interchangeability is not context-sensitive. Willard Van Orman Quine used the concept of cognitive synonymy extensively in his famous 1951 paper ''Two Dogmas of Empiricism'', where two words were cognitively synonymous if they were interchangeable in every possible instance. For example, * All bachelors are unmarried men. * All unmarried men are not married Quine notes that if we are referring to the word itself, this doesn't apply, as in, * "Bachelor" has less than ten letters. As compared to the substitution which is obviously false, * "Unmarried men" has less than ten letters. ==See also== * Synonym ring * Quotation * Analytic-synthetic distinction * Mental association * A priori * Empiricism 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「Cognitive synonymy」の詳細全文を読む スポンサード リンク
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