Abstract

Abstract The aim of this paper is to give an overview of Wittgenstein’s conception of the infinite. One focus of the paper is Wittgenstein’s rejection of what is dubbed a ‘realist’ model of our idea of the infinite. On this model our idea is the source of beliefs that we have about an independent reality. Another focus is the way in which Wittgenstein’s rejection of this model leads him to reject the idea of the infinite itself as it appears in certain mathematical contexts. I argue that these two rejections can be uncoupled: abandonment of the realist model of our idea of the infinite is consonant with full endorsement of the use to which mathematicians put the idea. There remains scope for Wittgenstein to take issue, if not with the use to which mathematicians put the idea, then with their choice of language in doing so, something that he has reason to do precisely because this choice encourages adoption of the realist model.

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