Manifest invalidity: Neil tennant's new argument for intuitionism

Document Type

Article

Publication Date

3-1-2003

Abstract

In Chapter 7 of The Taming of the True, Neil Tennant provides a new argument from Michael Dummett's "manifestation requirement" to the incorrectness of classical logic and the correctness of intuitionistic logic. I show that Tennant's new argument is only valid if one interprets crucial existence claims occurring in the proof in the manner of intuitionists. If one interprets the existence claims as a classical logician would, then one can accept Tennant's premises while rejecting his conclusion of logical revision. Thus, Tennant has provided no evidence that should convince anyone who is not already an intuitionist. Since his proof is a proof for the correctness of intuitionism, it begs the question. © 2003 Kluwer Academic Publishers.

Publication Source (Journal or Book title)

Synthese

First Page

353

Last Page

362

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