This book deals with Descartes' efforts in his Meditations to discover the first principles of human knowledge, that is, what must be known before anything else can be known. In order for these principles to be first principles, they cannot be conclusions obtained through deductive reasoning. Further, Descartes insists that these first principles cannot be known through the senses, but only through intuition or meditation, our only cognitive faculties for grasping self-evident first principles. This book provides Descartes' reasons for rejecting the senses as the source of these first...