What do you think of Richard Granger? I've read several of his papers (Essential Circuits of Cognition, Engines of the Brain), and as a non-neuroscientist his h

What do you think of Richard Granger? I've read several of his papers (Essential Circuits of Cognition, Engines of the Brain), and as a non-neuroscientist his hierarchical model seems interesting and plausible, and more importantly from my point of view, computationally feasible.