Joel Smith

In this long and detailed book Bennett and Hacker set themselves two ambitious tasks. The first is to offer a philosophical critique of, what they argue are, philosophical confusions within contemporary cognitive neuroscience. The second is to present a ‘conceptual reference work for cognitive neuroscientists who wish to check the contour lines of the psychological concept relevant to their investigation’ (p.7). In the process they cover an astonishing amount of material. The first two chapters present a critical history of neuroscience from Aristotle to Sherrington, Eccles and Penfield. Chapter three (to which I shall return), offers the philosophical basis for much of the book. Chapters four to twelve present detailed philosophical criticisms of a wide variety of neuroscientists (and some philosophers) on a large number of topics. These include: Crick, Damasio, Edelman, Marr and Frisby on perception (particularly the primary/secondary quality distinction and the binding problem); Milner, Squire and Kandel on memory; Blakemore and others on mental imagery; LaDoux and Damasio on the emotions; Libet on voluntary movement; and Baars, Crick, Edelman, Damasio, Penrose, Searle, Chalmers, and Nagel on consciousness (with a great deal on qualia and self-consciousness). Chapters thirteen and fourteen, along with the two appendices, contain an elaboration and defence of the book’s methodology and present explicit contrasts with the Churchlands, Dennett and Searle. Bennett and Hacker maintain that whilst neuroscientists have made significant discoveries concerning the workings of the brain, these discoveries have been obscured by their presentation within an incoherent conceptual framework. Their complaints, therefore, are often not with neuroscience itself but with what might be called its philosophical self image.