the selections concern "philosophical issues arising from the work of freud", such as the question of how freud's explanations relate to those in physical and experimental science. they represent a range of different viewpoints, the majority being within the tradition of analytic philosophy. wittgenstein's contribution, "conversations on freud; excerpt from 1932-33 lectures", reports on conversations between wittgenstein and the philosopher rush rhees. discussing the nature of science, wittgenstein contrasts psychology with physics, observing that the former may appear inadequate by comparison with the latter. he also explores freud's theory of dreams.