Oxford Studies in Philosophy of Mind presents cutting-edge work in the philosophy of mind, combining invited articles and articles selected from submissions. Each volume will highlight two themes to bring focus to debates. The series will reflect the diversity of methods adopted in contemporary philosophy of mind and provide a venue for rigorous and innovative work by both established and up-and-coming voices in the field.The themes covered in the fourth volume are twenty-first-century idealism, acquaintance and perception, and acquaintance and consciousness. It also contains a book symposium on David Chalmers' Reality+, and an article on Aristotle's philosophy of mind.