Explanation, Extrapolation, and Existence

Mark Colyvan (2010) raises two problems for ‘easy road’ nominalism about mathematical objects. The first is that a theory’s mathematical commitments may run too deep to permit the extraction of nominalistic content. Taking the math out is, or could be, like taking the hobbits out of Lord of the Ring...

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Main Author: Yablo, Stephen
Other Authors: Massachusetts Institute of Technology. Department of Linguistics and Philosophy
Format: Article
Language:en_US
Published: Oxford University Press 2014
Online Access:http://hdl.handle.net/1721.1/85648
https://orcid.org/0000-0002-9486-8323
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author Yablo, Stephen
author2 Massachusetts Institute of Technology. Department of Linguistics and Philosophy
author_facet Massachusetts Institute of Technology. Department of Linguistics and Philosophy
Yablo, Stephen
author_sort Yablo, Stephen
collection MIT
description Mark Colyvan (2010) raises two problems for ‘easy road’ nominalism about mathematical objects. The first is that a theory’s mathematical commitments may run too deep to permit the extraction of nominalistic content. Taking the math out is, or could be, like taking the hobbits out of Lord of the Rings. I agree with the ‘could be’, but not (or not yet) the ‘is’. A notion of logical subtraction is developed that supports the possibility, questioned by Colyvan, of bracketing a theory’s mathematical aspects to obtain, as remainder, what it says ‘mathematics aside’. The other problem concerns explanation. Several grades of mathematical involvement in physical explanation are distinguished, by analogy with Quine’s three grades of modal involvement. The first two grades plausibly obtain, but they do not require mathematical objects. The third grade is likelier to require mathematical objects. But it is not clear from Colyvan’s example that the third grade really obtains.
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spelling mit-1721.1/856482022-09-30T20:50:25Z Explanation, Extrapolation, and Existence Yablo, Stephen Massachusetts Institute of Technology. Department of Linguistics and Philosophy Yablo, Stephen Mark Colyvan (2010) raises two problems for ‘easy road’ nominalism about mathematical objects. The first is that a theory’s mathematical commitments may run too deep to permit the extraction of nominalistic content. Taking the math out is, or could be, like taking the hobbits out of Lord of the Rings. I agree with the ‘could be’, but not (or not yet) the ‘is’. A notion of logical subtraction is developed that supports the possibility, questioned by Colyvan, of bracketing a theory’s mathematical aspects to obtain, as remainder, what it says ‘mathematics aside’. The other problem concerns explanation. Several grades of mathematical involvement in physical explanation are distinguished, by analogy with Quine’s three grades of modal involvement. The first two grades plausibly obtain, but they do not require mathematical objects. The third grade is likelier to require mathematical objects. But it is not clear from Colyvan’s example that the third grade really obtains. 2014-03-14T18:40:44Z 2014-03-14T18:40:44Z 2012-10 Article http://purl.org/eprint/type/JournalArticle 0026-4423 1460-2113 http://hdl.handle.net/1721.1/85648 Yablo, S. “Explanation, Extrapolation, and Existence.” Mind 121, no. 484 (October 1, 2012): 1007–1029. https://orcid.org/0000-0002-9486-8323 en_US http://dx.doi.org/10.1093/mind/fzs120 Mind Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Oxford University Press MIT web domain
spellingShingle Yablo, Stephen
Explanation, Extrapolation, and Existence
title Explanation, Extrapolation, and Existence
title_full Explanation, Extrapolation, and Existence
title_fullStr Explanation, Extrapolation, and Existence
title_full_unstemmed Explanation, Extrapolation, and Existence
title_short Explanation, Extrapolation, and Existence
title_sort explanation extrapolation and existence
url http://hdl.handle.net/1721.1/85648
https://orcid.org/0000-0002-9486-8323
work_keys_str_mv AT yablostephen explanationextrapolationandexistence