Authoritative account of the development of Boole's ideas in logic and probability theory ranges from The Mathematical Analysis of Logic to the end of his career. The Laws of Thought formed the most systematic statement of Boole's theories; this volume contains incomplete studies intended for a follow-up volume. 1952 edition.

"... an attempt to revive ontology (or metaphysics) -- indeed philosophy itself -- by means of a two-sided conception of being.... This is a remarkable idea which has produced a powerful book." -- Leonard Lawlor "... a major philosophical study: rich, brilliant... a tour de force, a seminal study that will be a starting-point for future research in this area." -- Robert Bernasconi In Truth and Genesis, Miguel de Beistegui considers the role and meaning of philosophy today. Calling for a new departure for philosophy, one that brings together philosophy's scattered identities, de Beistegui proposes a robust and unified philosophy that would find itself equally at home in artistic and scientific disciplines. To build this renewed philosophy, de Beistegui turns to Aristotle and the earliest foundations of thought. He traces philosophy's development through the medieval and modern periods before comparing and investigating the work of two of the 20th century's most influential thinkers, Martin Heidegger and Gilles Deleuze. In particular, de Beistegui focuses on Deleuze's Difference and Repetition and Heidegger's Contributions to Philosophy for their handling of the concept of difference. De Beistegui concludes that Deleuze and Heidegger are irreconcilable, but it is in their disagreements that he sees a way to liberate philosophy from its current crisis.

The Laws of Thought is an exploration of the deductive and inductive foundations of rational thought. The author here clarifies and defends Aristotle’s Three Laws of Thought, called the Laws of Identity, Non-contradiction and Exclusion of the Middle – and introduces two more, which are implicit in and crucial to them: the Fourth Law of Thought, called the Principle of Induction, and the Fifth Law of Thought, called the Principle of Deduction. This book is a thematic compilation drawn from past works by the author over a period of twenty-three years.