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  1. added 2020-05-11
    Frege's Sharpness Requirement and Natural Language.Richard Vulich - 2009 - Florida Philosophical Review 9 (1):78-90.
    Controversy exists concerning the consequences of Frege's sharpness requirement for concepts and functions. Some say that the sharpness requirement, if taken to be a necessary condition for truth functional language use, renders most of our natural language discourse meaningless. This is because most if not all natural language concepts and predicates are not sharp. In this essay I argue first that Frege does indeed see the sharpness requirement as a necessary condition on a language's truth- functionality in all contexts in (...)
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  2. added 2020-05-10
    Frege's View on Vagueness.Marco Ruffino - 2003 - Manuscrito 26 (2):253-277.
    The purpose of this paper is to discuss Frege’s view on vagueness, and to draw some relevant consequences of it. By examining what exactly Frege has in mind each time he complains about vagueness and advocates the sharpness requirement, I argue that he shows preoccupation with different kinds of vagueness in different periods of his thought. I also discuss the scope of the sharpness requirement, and argue that it is intended as applying primarily to mathematics and logic. Finally, I try (...)
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  3. added 2020-05-04
    Frege on Vagueness and Ordinary Language.Stephen Puryear - 2013 - Philosophical Quarterly 63 (250):120-140.
    Frege, we are told, believes that vague predicates have no referent (Bedeutung). But given other things he evidently believes, such a position would seem to commit him to a suspect nihilism according to which assertoric sentences containing vague predicates are neither true nor false. I argue that we have good reason to resist ascribing to Frege the view that vague predicates have no Bedeutung and thus good reason to resist seeing him as committed to the suspect nihilism. In the process, (...)
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  4. added 2020-05-04
    Vagueness.Timothy Williamson - 1994 - Routledge.
    Vagueness provides the first comprehensive examination of a topic of increasing importance in metaphysics and the philosophy of logic and language. Timothy Williamson traces the history of this philosophical problem from discussions of the heap paradox in classical Greece to modern formal approaches such as fuzzy logic. He illustrates the problems with views which have taken the position that standard logic and formal semantics do not apply to vague language, and defends the controversial realistic view that vagueness is a kind (...)
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  5. added 2020-05-04
    Frege and Vagueness.Jan van Heijenoort - 1986 - In Leila Haaparanta & Jaakko Hintikka (eds.), Frege Synthesized: Essays on the Philosophical and Foundational Work of Gottlob Frege. Dordrecht: D. Reidel. pp. 31-45.
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  6. added 2020-05-04
    On the Coherence of Vague Predicates.Crispin Wright - 1975 - Synthese 30 (3-4):325--65.