Classical Logic and Intuitionistic Logic: looking both ways

September 6, 2022

Abstract: We know a great many technical results concerning the relationship between classical logic and intuitionistic logic, whether in the propositional, first-order or higher-order languages. We also know quite a lot about the relationship between intuitionistic and classical theories. In this talk, I will explore some of what these results might mean, from the perspective of partisans of one side or other of the divide, and what kinds of pluralism might be tenable, in the light of the existing and long-standing practices of classical and constructive mathematics.


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I’m Greg Restall, and this is my personal website. I am the Shelby Cullom Davis Professor of Philosophy at the University of St Andrews. I like thinking about – and helping other people think about – logic and philosophy and the many different ways they can inform each other.

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