|Quotes: symbols for highlighting parts in a sentence or text. Often for identification of quotations or for distancing. For philosophical problems see also mention/use, quasi-quotation.|
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Quotes/quotation marks/Prior: do not form even the sentence itself, but the name of the sentence - some qu.m. are part of the sentence and change the number of letters of the sentence. - Other: more like demonstratives: "The cat ...> this has n letters" (only once quotation marks).
Objects of thought Oxford 1971
Arthur N. Prior
Papers on Time and Tense 2nd Edition Oxford 2003