Book excerpt: Hume's Epistemological Evolution argues that Hume's Enquiry represents a significant departure from the Treatise in respect of its epistemological framework. The Treatise's treatment of skepticism is an unsatisfactory one, as Hume seems to realize, and he therefore forms a new epistemological framework in the Enquiry. Qu's central argument is that Hume's epistemology evolves between these two works.