"A delightful book … I should like to have written it myself." — Bertrand Russell First published in 1936, this first full-length presentation in English of the Logical Positivism of Carnap, Neurath, and others has gone through many printings to become a classic of thought and communication. It not only surveys one of the most important areas of modern thought; it also shows the confusion that arises from imperfect understanding of the uses of language. A first-rate antidote for fuzzy thought and muddled writing, this remarkable book has helped philosophers, writers, speakers, teachers, students, and general readers alike. Mr. Ayers sets up specific tests by which you can easily evaluate statements of ideas. You will also learn how to distinguish ideas that cannot be verified by experience — those expressing religious, moral, or aesthetic experience, those expounding theological or metaphysical doctrine, and those dealing with a priori truth. The basic thesis of this work is that philosophy should not squander its energies upon the unknowable, but should perform its proper function in criticism and analysis.

A. J. Ayer (1910-1989) was a man of startling complexity: an exceptionally rigorous and penetrating philosopher, he was also a dedicated hedonist and seducer. He traveled in the most glamorous social circles, yet his friends found him oddly remote. Internationally acclaimed author Ben Rogers brings the brilliant, strangely vulnerable author of the classic Language, Truth, and Logic to vivid life, along with the Oxford intellectual world where he met Isaiah Berlin, Ludwig Wittgenstein, and many other great thinkers and writers of the era. Colorful, intimate, and often poignant, this is a powerful biography of a provocative and unforgettable man whose ideas changed the landscape of Western thought. "Beautifully written, sympathetic, and sensitive ... [a] balanced and rounded picture of a very complicated man." -- Simon Blackburn, The New Republic "A readable and well-researched account of the life and career of a remarkable figure." -- Lynwood Abram, Houston Chronicle "A.J. Ayer lived a fascinating life and in Rogers he has found an ideal biographer....." -- Frank McLynn, The New Statesman "Rogers succeeds in capturing the spirit of a philosophical maverick who many loved to hate." -- Kirkus Reviews "Exceptionally good ... A.J. Ayer weaves the philosophical, public, and private strands of Ayer's life together most skillfully." -- The Economist

In this new edition of Probability and Evidence, first published in 1972, one of the foremost analytical philosophers of the twentieth century addresses central questions in epistemology and the philosophy of science. Based on Ayer's influential Dewey Lectures of 1970, Probability and Evidence contains revised versions of the lectures and two additional essays. This new edition includes Graham Macdonald's extensive introduction explaining the book's importance and influence in contemporary philosophy.

This, the 21st volume in the Library of Living Philosophers, is more than Sir Alfred Ayer's final word on the philosophical issues that preoccupied him for more than sixty years; the list of contributors is a roll-call of some of the greatest living figures in philosophy, each expertly addressing a key problem arising in Ayer's work. Most of the critical papers are answered directly and in detail by Sir Alfred-he completed his replies to 21 of the 24 papers before his death. Contributors include: A. J. Ayer, Evandro Agazzi, James Campbell, David S. Clarke, Michael Dummett, Elizabeth Eames, John Foster, Dimitri Ginev, Paul Gochet, Martin Hollis, Ted Honderich, Tscha Hung, Peter Kivy, Arne Naess, D. J. O'Connor, Desiree Park, David Pears, Azarya Polikarov, Hilary Putnam, Francisco Miró, Quesada C., A. Anthony Quinton, Emanuele Riverso, Ernest Sosa, T. L. S. Sprigge, Barry Stroud, and David Wiggins.

With extraordinary concision and clarity, A. J. Ayer gives an account of the major incidents of Bertrand Russell's life and an exposition of the whole range of his philosophy. "Ayer considers Russell to be, except possibly for Wittgenstein, the most influential philosopher of our time. In this book [he] gives a lucid account of Russell's philosophical achievements."—James Rachels, New York Times Book Review "I am sure [this] is the best introduction of any length to Russell, and I suspect that it might serve as one of the best introductions to modern philosophy. . . . Ayer begins with a brief, austere, and balanced account of Russell's life: as in Russell's autobiography this means his thought, books, women, and politics. Tacitus (and Russell) would have found the account exemplary. Ayer ends with a sympathetic and surprisingly detailed survey of Russell's social philosophy. But the bulk of this book consists of a chapter on Russell's work in logic and the foundations of mathematics, followed by a chapter on his epistemological views and one on metaphysics. . . . I find it impossible to imagine that this book will not remain indefinitely the very best book of its sort."—Review of Metaphysics "The confrontation or conjunction of Ayer and Russell is a notable event and has produced a remarkable book—brilliantly argued and written."—Martin Lebowitz, The Nation

In this introduction to some of the most frequently discussed areas of philosophy, Sir Alfred Ayer made his subject accessible to both the general reader and the student. Among the topics covered are the nature of philosophy, varieties of philosophical analysis, theory of knowledge, status of physical objects, relations between body and mind, character of scientific explanation, theory of probability, elements of logic and the claims of theology. Although it ranges more widely, the book invites comparison with Bertrand Russell's The Problems of Philosophy.

A. J. Ayer, who died in 1989, was acknowledged as one of Britain's most distinguished philosophers. In this memorial collection of essays leading Western philosophers reflect on Ayer's place in the history of philosophy and explore aspects of his thought and teaching. The volume also includes a posthumous essay by Ayer himself: "A Defence of Empiricism." These essays are undoubtedly a fitting tribute to a major figure, but the collection is not simply retrospective; rather it looks forward to present and future developments in philosophical thought that Ayer's work has stimulated.