A Nontransitive Theory of Truth over PA

David Ripley has argued extensively for a nontransitive theory of truth by dropping the rule of Cut in a sequent calculus setting in order to get around triviality caused by paradoxes such as the Liar. However, comparing his theory with a wide range of classical approaches in the literature is probl...

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Main Author: Jonathan Dittrich
Format: Article
Language:English
Published: Sociedad Argentina de Análisis Filosófico (SADAF) 2021-11-01
Series:Análisis Filosófico
Subjects:
Online Access:http://analisisfilosofico.org/index.php/af/article/view/456
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author Jonathan Dittrich
author_facet Jonathan Dittrich
author_sort Jonathan Dittrich
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description David Ripley has argued extensively for a nontransitive theory of truth by dropping the rule of Cut in a sequent calculus setting in order to get around triviality caused by paradoxes such as the Liar. However, comparing his theory with a wide range of classical approaches in the literature is problematic because formulating it over an arithmetical background theory such as Peano Arithmetic is non-trivial as Cut is not eliminable in Peano Arithmetic. Here we make a step towards closing this gap by providing a suitable restriction of the Cut rule, which allows for a nontransitive theory of truth over Peano Arithmetic that is proof-theoretically as strong as the strongest known classical theory of truth.
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spelling doaj.art-b3eba9aa49fc410bb7e7336e8f3e99522023-08-02T00:00:42ZengSociedad Argentina de Análisis Filosófico (SADAF)Análisis Filosófico0326-13011851-96362021-11-01412273283https://doi.org/10.36446/af.2021.456A Nontransitive Theory of Truth over PAJonathan Dittrich0Munich Center for Mathematical Philosophy, Ludwig-Maximilians-Universität, Munich, GermanyDavid Ripley has argued extensively for a nontransitive theory of truth by dropping the rule of Cut in a sequent calculus setting in order to get around triviality caused by paradoxes such as the Liar. However, comparing his theory with a wide range of classical approaches in the literature is problematic because formulating it over an arithmetical background theory such as Peano Arithmetic is non-trivial as Cut is not eliminable in Peano Arithmetic. Here we make a step towards closing this gap by providing a suitable restriction of the Cut rule, which allows for a nontransitive theory of truth over Peano Arithmetic that is proof-theoretically as strong as the strongest known classical theory of truth.http://analisisfilosofico.org/index.php/af/article/view/456cutparadoxliartruth
spellingShingle Jonathan Dittrich
A Nontransitive Theory of Truth over PA
Análisis Filosófico
cut
paradox
liar
truth
title A Nontransitive Theory of Truth over PA
title_full A Nontransitive Theory of Truth over PA
title_fullStr A Nontransitive Theory of Truth over PA
title_full_unstemmed A Nontransitive Theory of Truth over PA
title_short A Nontransitive Theory of Truth over PA
title_sort nontransitive theory of truth over pa
topic cut
paradox
liar
truth
url http://analisisfilosofico.org/index.php/af/article/view/456
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AT jonathandittrich nontransitivetheoryoftruthoverpa