In this episode, we continue our discussion of Dwarkesh Patel's article "Contra David Deutsch on AI" compared to Brett Hall's tweet on IQ theory. This time we concentrate on criticisms of Patel's Hardware+Scaling hypothesis. To Patel's credit, he admits that his hypothesis is problematic. 

Then Peter asks Bruce about why Brett Hall believes explanatory universality implies 'equal intellectual capacity'. Bruce gives a steelmanned version of Brett's theory that takes us through an explanation of what explanatory universality is and how it relates to computational universality and the Turing Principle.