Journal Article

'Yes and no'

I Rumfitt

in Mind

Published on behalf of Mind Association

Volume 109, issue 436, pages 781-823
Published in print October 2000 | ISSN: 0026-4423
Published online October 2000 | e-ISSN: 1460-2113 | DOI: https://dx.doi.org/10.1093/mind/109.436.781

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In what does the sense of a sentential connective consist? Like many others, I hold that its sense lies in rules that govern deductions. In the present paper, however, I argue that a classical logician should take the relevant deductions to be arguments involving affirmative or negative answers to yes-or-no questions that contain the connective. An intuitionistic logician will differ in concentrating exclusively upon affirmative answers. I conclude by arguing that a well known intuitionistic criticism of classical logic fails if the answer 'No' is accorded parity with the answer 'Yes'.

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Subjects: Metaphysics ; Epistemology ; Philosophy of Mathematics and Logic ; Philosophy of Mind ; Philosophy of Language