Scrutability and Epistemic Updating: Comments on Chalmers's Constructing the World

Abstract

In Constructing the World, Chalmers seeks to articulate and defend an important epistemic accessibility thesis, the Scrutability of Truth, which is crucial to Chalmers’ rationalist approach to meaning and modality. Chapters 3 and 4 of the book are devoted to persuading us that the move from weaker to stronger forms of Scrutability is intuitively plausible. In these comments, I want to question this move. The plausibility of strong forms of Scrutability hinges on controversial views about epistemic norms for answering ‘what is x?’ questions that semantic externalists have good reason to reject.