Broadly speaking, this is a book about truth and the criteria thereof. Thus it is, in a sense, a book about justification and rationality. But it does not purport to be about the notion of justification or the notion of rationality. For the assumption that there is just one notion of justification, or just one notion of rationality, is, as the book explains, very misleading. Justification and rationality come in various kinds. And to that extent, at least, we should recognize a variety of notions of justification and rationality. This, at any rate, is one of the morals of Chapter VI. This book, in Chapters I-V, is mainly concerned with the kind of justification and rationality characteristic of a truth-seeker, specifically a seeker of truth about the world impinging upon the senses: the so-called empirical world. Hence the book's title. But since the prominent contemporary approaches to empirical justification are many and varied, so also are the epistemological issues taken up in the following chapters. For instance, there will be questions about so-called coherence and its role, if any, in empirical justification. And there will be questions about social consensus (whatever it is) and its significance, or the lack thereof, to empirical justification. Furthermore, the perennial question of whether, and if so how, empirical knowledge has so-called founda tions will be given special attention.

In this important new book, Jürgen Habermas takes up certain fundamental questions of philosophy. While much of his recent work has been concerned with issues of morality and law, in this new work Habermas returns to the traditional philosophical questions of truth, objectivity and reality which were at the centre of his earlier classic book Knowledge and Human Interests. How can the norms that underpin the linguistically structured world in which we live be brought into step with the contingency of the development of socio-cultural forms of life? How can the idea that our world exists independently of our attempts to describe it be reconciled with the insight that we can never reach reality without the mediation of language and that 'bare' reality is therefore unattainable? In Knowledge and Human Interests Habermas answered these questions with reference to a weak naturalism and a transcendental-pragmatic realism. Since then, however, he has developed a formal pragmatic theory which is based on an analysis of speech acts and language use. In this new volume Habermas takes up the philosophical questions of truth, objectivity and reality from the perspective of his linguistically-based pragmatic theory. The final section addresses the limits of philosophy and reassesses the relation between theory and practice from a perspective that could be described as 'post-Marxist'. This volume, now available in paperback as well, by one of the world's leading philosophers will be essential reading for students and scholars of philosophy, social theory and the humanities and social sciences generally.

A leading psychologist explains why nearly all of us—including many of those who are persecuted and powerless—so often defend the social systems that cause misery and injustice. Why do we so often defend the very social systems that are responsible for injustice and exploitation? In A Theory of System Justification, John Jost argues that we are motivated to defend the status quo because doing so serves fundamental psychological needs for certainty, security, and social acceptance. We want to feel good not only about ourselves and the groups to which we belong, but also about the overarching social structure in which we live, even when it hurts others and ourselves. Jost lays out the wide range of evidence for his groundbreaking theory and examines its implications for our communities and our democracy. Drawing on twenty-five years of research, he provides an accessible account of system justification theory and its insights. System justification helps to explain deep contradictions, including the feeling among some women that they don’t deserve the same salaries as men and the tendency of some poor people to vote for policies that increase economic inequality. The theory illuminates the most pressing social and political issues of our time—why has it been so hard to combat anthropogenic climate change?—as well as some of the most intimate—why do some black children prefer white dolls to black ones and why do some people stay in bad relationships? Jost’s theory has far-reaching implications, and he offers numerous insights that political activists and social justice advocates can use to promote change.

How must our knowledge be systematically organized in order to justify our beliefs? There are two options—the solid securing of the ancient foundationalist pyramid or the risky adventure of the new coherentist raft. For the foundationalist like Descartes each piece of knowledge can be stacked to build a pyramid. Not so, argues Laurence BonJour. What looks like a pyramid is in fact a dead end, a blind alley. Better by far to choose the raft. Here BonJour sets out the most extensive antifoundationalist argument yet developed. The first part of the book offers a systematic exposition of foundationalist views and formulates a general argument to show that no variety of foundationalism provides an acceptable account of empirical justification. In the second part he explores a coherence theory of empirical knowledge and argues that a defensible theory must incorporate an adequate conception of observation. The book concludes with an account of the correspondence theory of empirical truth and an argument that systems of empirical belief which satisfy the coherentist standard of justification are also likely to be true.

The past twenty-five years have seen a major renewal of interest in the topic of a priori knowledge. In the sixteen essays collected here, which span this entire period, philosopher Albert Casullo documents the complex set of issues motivating the renewed interest, identifies the central epistemological questions, and provides the leading ideas of a unified response to them. Throughout the essays, Casullo offers a systematic treatment of the concept of a priori knowledge, the existence of a priori knowledge, and the relationship between a priori knowledge and the related concepts of necessary truth and analytic truth. The essays fall into three categories: six published prior to his A Priori Justification (OUP, 2003), four published after the book, and four previously unpublished papers. The first six essays provide the background and introduction to a number of the major themes of the book: the articulation and defense of the minimal conception of a priori justification, an exposition of the limitations of the traditional arguments both for and against a priori knowledge, and the relevance of empirical investigation to providing supporting evidence for the claim that there are nonexperiential sources of justification. The remaining four published essays explore diverse themes that were introduced in Casullo's previous book but not developed in detail: epistemic overdetermination, the relationship between a priori knowledge and necessary truth, testimony and a priori knowledge, and the bearing of socio-historical accounts of knowledge on the a priori. The four previously unpublished essays address issues that have either emerged or taken on more prominence in the literature on the a priori since the publication of Casullo's previous book: the evidential status of intuitions, the nature of modal knowledge, and challenges to the cogency or the significance of the a priori-a posteriori distinction.

For centuries philosophers have attached much importance to a priori knowledge, but recent work in epistemology and experimental philosophy has questioned this. Leading philosophers discuss explanations of the a priori, challenges to its existence, the status of intuition, and the justification of belief—topics at the centre of current debate.

This book is a manuscript that was virtually complete when James W. Cornman died. Most of the chapters were in final form, and all but the last had been revised by the author. The last chapter was in handwritten form, and the concluding remarks were not finished. Swain took charge of the proofreading and John L. Thomas compiled the indices with the assistance of Lehrer. It is our opinion that this manuscript, like the other books Cornman published, is one of exceptional scholarly and philo sophical importance. As do all of his philosophical publications, this work reflects Cornman's great love for philosophy and his commitment to the search for truth. Every serious student and author of epistemology will benefit from and admire the thorough scholarship and rigorous argumentation they will find herein. It has been our privilege to partici pate in the preparation of the manuscript for the philosophical public. KEITH LEHRER MARSHALL SWAIN IX INTRODUCTION INTRODUCTION TO EPISTEMOLOGICAL SKEPTICISM Many philosophers try to refute skepticism, but few try to give a precise characterization of the thesis they attack. My first aim, consequently, is to characterize skepticism, or, more precisely, several species of skepticism. Then I shall choose those species I wish to consider and justify my choice. To begin, let me distinguish what I shall call "epistemological skepticism" from the thesis I shall call "ontological nihilism" and from what is believed by someone whom I shall call an "ontological skeptic".