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John Buridan$
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Gyula Klima

Print publication date: 2008

Print ISBN-13: 9780195176223

Published to Oxford Scholarship Online: January 2009

DOI: 10.1093/acprof:oso/9780195176223.001.0001

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Logical Validity in a Token-Based, Semantically Closed Logic

Logical Validity in a Token-Based, Semantically Closed Logic

John Buridan

Gyula Klima (Contributor Webpage)

Oxford University Press

This chapter provides a comprehensive survey of Buridan’s conception of logical validity in a semantically closed token-based system, as he conceives of natural languages. The chapter argues first that Buridan has very good logical, as well as merely metaphysical, reasons to conceive of natural languages as compositional systems of significative token-symbols. Next, the chapter discusses the peculiar Buridanian conception truth and validity, according to which validity must not be based on truth, and truth need not always follow upon correspondence. These results are presented as the consequences of Buridan’s pursuit of a consistently nominalist semantics for natural languages, able to handle the Liar Paradox and its kin involving reflective uses of language without the Tarskian distinction between object-language and meta-language, rejected for systematic reasons in the seventh chapter.

Keywords:   logical validity, truth, correspondence, Liar Paradox

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