
Contents
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1. Introduction 1. Introduction
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2. A Minimal Modal Framework 2. A Minimal Modal Framework
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3. Some K-Sound Notions of Assertibility 3. Some K-Sound Notions of Assertibility
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3.1. A Priori Warrants 3.1. A Priori Warrants
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3.2. Provability Interpretations 3.2. Provability Interpretations
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3.3. Absolute Provability 3.3. Absolute Provability
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3.4. Peircean Stability and Gödel Sequences 3.4. Peircean Stability and Gödel Sequences
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3.5. Modalizing a Gödel Sequence 3.5. Modalizing a Gödel Sequence
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4. Obstructions to Syntactic Interpretability 4. Obstructions to Syntactic Interpretability
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5. Two Applications of the Gödel Fixed Point 5. Two Applications of the Gödel Fixed Point
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6. Outer Reflection, Inner Reflection, and Moore’s Paradox 6. Outer Reflection, Inner Reflection, and Moore’s Paradox
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7. Syntactic Uninterpretability via Löb’s Theorem 7. Syntactic Uninterpretability via Löb’s Theorem
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8. Toward a Unified Framework 8. Toward a Unified Framework
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9. Gödel Sequences Revisited 9. Gödel Sequences Revisited
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10. Conclusion 10. Conclusion
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Notes Notes
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References References
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25 Assertibility and Paradox
Get accessTimothy G. McCarthy is Emeritus Professor of Philosophy at the University of Illinois.
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Published:08 January 2019
Cite
Abstract
Antinomies involving the assertibility modal arise when we consider what are called “syntactic interpretations” of the assertibility operator A, translation schemes in which the operator is interpreted in terms of a monadic predicate in the nonmodal fragment of the language. Such a translation scheme, of course, is nothing more than a systematic attempt to replace the assertibility modality by a concept, and trouble tends to arise precisely when the concept is too truthlike. In this chapter, a number of paradoxical syntactic interpretations of the assertibility modality are explored. In each case, the paradox consists in an inconsistency affecting the syntactic transcription of certain apparently unexceptionable combinations of modal principles concerning the assertibility operator. It is argued that the modal construal of the notion of assertibility is fundamental, and a standard model theoretic semantics is presented for it. I finally suggest that an assertibility predicate for a language L with the assertibility operator be recovered at the metalinguistic level: a sentence p will be said to be assertible in L if and only if the sentence Ap is true in L, with the result that the alternative forms for a theory of the assertibility property in L exactly mirror the alternative forms for a theory of truth for L. Some consequences of these observations for the philosophy of mathematics are explored.
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