Truth and Existence

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2017
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Heylen, Jan
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Thought : A Journal of Philosophy. Wiley-Blackwell. 2017, 6(2), pp. 106-114. eISSN 2161-2234. Available under: doi: 10.1002/tht3.238
Zusammenfassung

Halbach has argued that Tarski biconditionals are not ontologically conservative over classical logic, but his argument is undermined by the fact that he cannot include a theory of arithmetic, which functions as a theory of syntax. This article is an improvement on Halbach's argument. By adding the Tarski biconditionals to inclusive negative free logic and the universal closure of minimal arithmetic, which is by itself an ontologically neutral combination, one can prove that at least one thing exists. The result can then be strengthened to the conclusion that infinitely many things exist. Those things are not just all Gödel codes of sentences but rather all natural numbers. Against this background inclusive negative free logic collapses into noninclusive free logic, which collapses into classical logic. The consequences for ontological deflationism with respect to truth are discussed.

Zusammenfassung in einer weiteren Sprache
Fachgebiet (DDC)
100 Philosophie
Schlagwörter
disquotational theory of truth, Tarski biconditionals, ontological deflationism, inclusive negative free logic, universal closure of arithmetic, nominalism, finitism
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undefined / . - undefined, undefined
Zitieren
ISO 690HEYLEN, Jan, Leon HORSTEN, 2017. Truth and Existence. In: Thought : A Journal of Philosophy. Wiley-Blackwell. 2017, 6(2), pp. 106-114. eISSN 2161-2234. Available under: doi: 10.1002/tht3.238
BibTex
@article{Heylen2017-06Truth-49409,
  year={2017},
  doi={10.1002/tht3.238},
  title={Truth and Existence},
  number={2},
  volume={6},
  journal={Thought : A Journal of Philosophy},
  pages={106--114},
  author={Heylen, Jan and Horsten, Leon}
}
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