Douglas Hofstadter’s book is concerned directly with the nature of "maps” or links between formal systems. However, according to Hofstadter, the formal system that underlies all mental activity transcends the system that supports it. If life can grow out of the formal chemical...

How ought we to live? What really exists? How do we know? This book introduces important themes in ethics, knowledge, and the self, via readings from Plato, Aristotle, Descartes, Hegel, Darwin, and Buddhist writers. It emphasizes throughout the point of studying philosophy, explains how different...