This philosophical study presents an examination of metaphysics and ethics, focusing on the role of conceptual analysis, metaphysical necessity, and the location problem for ethics.

Presents the general theory of the thought experiment. This work analyses a variety of thought experiments, ranging from aesthetics to zoology, and explores what thought experiments are, how they work, and what their positive and negative aspects are. It also integrates advances in experimental psychology and the history of science.

A second revised edition of this title in which the author discusses the nature of philosophy and posits his theories of absolute presuppositions, causation and the logic of question and answer. Three other texts, previously unpublished, have been added to this volume, and expand on the original essay.

The third edition of this text is ideal for introductory courses in epistemology. Assuming little or no philosophical knowledge, it guides beginning students through the landmarks in epistemology, covering historically important topics as well as current issues and debates.

This accessible and lucidly written guide introduces the student of Wittgenstein to his most important work, the Philosophical Investigations and assesses its relationship to contemporary philosophy.