There is a lot that we don't know. That means that there are a lot of possibilities that are, epistemically speaking, open. For instance, we don't know whether it rained in Seattle yesterday. So, for us at least, there is an epistemic possibility where it rained in Seattle yesterday, and one where it did not. What are these epistemic possibilities? They do not match up with metaphysical possibilities - there are various cases where something is epistemically possible but not metaphysically possible, and vice versa. How do we understand the semantics of statements of epistemic modality? The ten new essays in this volume explore various answers to these questions, including those offered by contextualism, relativism, and expressivism.

Probabilistic models have much to offer to philosophy. We continually receive information from a variety of sources: from our senses, from witnesses, from scientific instruments. When considering whether we should believe this information, we assess whether the sources are independent, how reliable they are, and how plausible and coherent the information is. Bovens and Hartmann provide a systematic Bayesian account of these features of reasoning. Simple Bayesian networks allow us to model alternative assumptions about the nature of the information sources. Measurement of the coherence of information is a controversial matter: arguably, the more coherent a set of information is, the more confident we may be that its content is true, other things being equal. The authors offer a new treatment of coherence which respects this claim and shows its relevance to scientific theory choice. Bovens and Hartmann apply this methodology to a wide range of much-discussed issues regarding evidence, testimony, scientific theories and voting. "Bayesian Epistemology" is for anyone working on probabilistic methods in philosophy, and has broad implications for many other disciplines.

"Cognition" is a basic introductory text for college courses in the philosophy of knowledge. Joseph Owens here expands the narrowly metaphysical treatment of knowledge given in his earlier book, "An Elementary Christian Metaphysics" into a fully-fledged epistemology. This text utilises the traditions of Aristotle and Thomas Aquinas to reacquaint students of philosophy with a number of insights which are basic to a philosophic understanding of knowledge. These insights into the nature of abstraction, truth, the ground of certitude, and other major concerns of epistemology are intended to help students clarify the approaches of contemporary philosophies.

Barry Taylor's book mounts an argument against one of the fundamental tenets of much contemporary philosophy, the idea that we can make sense of reality as existing objectively, independently of our capacities to come to know it. Part One sets the scene by arguings that traditional realism can be explicated as a doctrine about truth - that truth is objective, that is, public, bivalent, and epistemically independent. Part Two, the centrepiece of the book, shows how a form of Hilary Putnam's model-theoretic argument demonstrates that no such notion of truth can be founded on the idea of correspondence, as explained in model-theoretic terms (more traditional accounts of correspondence having been already disposed of in Part One). Part Three argues that non-correspondence accounts of truth - truth as superassertibility or idealized rational acceptability, formal conceptions of truth, Tarskian truth - also fail to meet the criteria for objectivity; along the way, it also dismisses the claims of the latterday views of Putnam, and of similar views articulated by John McDowell, to constitute a new, less traditional form of realism. In the Coda, Taylor bolsters some of the considerations advanced in Part Three in evaluating formal conceptions of truth, by assessing and rejecting the claims of Robert Brandom to have combined such an account of truth with a satisfactory account of semantic structure. He concludes that there is no defensible notion of truth which preserves the theses of traditional realism, nor any extant position sufficiently true to the ideals of that doctrine to inherit its title. So the only question remaining is which form of antirealism to adopt.

The development of Critical Realism (CR), as a philosophy of science, is generally attributed to a series of books by Roy Bhaskar. It has proven to be influential, not least because it has an affinity with many people's views about the way the world fits together, both within and outside of academia. Whilst there are numerous contributions outlining CR theory in sociological and organizational research, as well as general texts about realist ontology, work delineating the consequences of these views for research practice is an emerging area of interest. This book aims to fill a significant gap in the literature by providing a practical guide to the application of CR in empirical research projects. More specifically, it explores the methodological consequences of committing to a CR ontology-the assumptions that researchers from this tradition make about the nature of reality. These assumptions are important because ontological commitments, which relate what we believe exists, often affect our epistemological concerns, which relate to our beliefs about how whatever exists can be studied and known. Thus, for a researcher, ontology and epistemology are important because they have consequences for the possibilities and limits of the research methods, techniques, and analyses that they employ. The book explains what CR is and outlines the logic of research design. In a series of chapters on major social science research methods, purpose-written by experts in the relevant technique, the book contains extended illustration of how to conduct inquiry using CR.

Knowledge in an Uncertain World is an exploration of the relation between knowledge, reasons, and justification. According to the primary argument of the book, you can rely on what you know in action and belief, because what you know can be a reason you have and you can rely on the reasons you have. If knowledge doesn't allow for a chance of error, then this result is unsurprising. But if knowledge does allow for a chance of error - as seems required if we know much of anything at all - this result entails the denial of a received position in epistemology. Because any chance of error, if the stakes are high enough, can make a difference to what can be relied on, two subjects with the same evidence and generally the same strength of epistemic position for a proposition can differ with respect to whether they are in a position to know.
In defending these points, Fantl and McGrath investigate the ramifications for debates about epistemological externalism and contextualism, the value and importance of knowledge, Wittgensteinian hinge propositions, Bayesianism, and the nature of belief. The book is essential reading for epistemologists, philosophers who work on reasons and rationality, philosophers of language and mind, and decision theorists.

This book provides an accessible and up-to-date discussion of contemporary theories of perceptual justification that each highlight different factors related to perception, i.e., conscious experience, higher-order beliefs, and reliable processes. The book's discussion starts from the viewpoint that perception is not only one of our fundamental sources of knowledge and justification, but also plays this role for many less sophisticated animals. It proposes a scientifically informed reliabilist theory which can accommodate this fact without denying that some of our epistemic abilities as human perceivers are special. This allows it to combine many of our intuitions about the importance of conscious experience and higher-order belief with the controversial thesis that perceptual justification is fundamentally non-evidential in character.

The subect of this book is the philosophical relationship between Ludwig Wittgenstein and G.E. Moore and their overlapping, but nevertheless differing, views. Both defended the existence of certainty and this opposed any forms of skepticism. However, their defences and conceptions of certainty differed widely, as did their understanding of the nature of skepticism and how best to combat it. Stroll's book contains a careful and critical analysis of their differing approaches to a set of fundamental epistemological problems.

Biological Time, Historical Time presents a new approach to 19th century thought and literature: by focussing on the subject of time, it offers a new perspective on the exchanges between French and German literary texts on the one hand and scientific disciplines on the other. Hence, the rivalling influences of the historical sciences and of the life sciences on literary texts are explored, texts from various scientific domains - medicine, natural history, biology, history, and multiple forms of vulgarisation - are investigated. Literary texts are analysed in their participation in and transformation of the scientific imagination. Special attention is accorded to the temporal dimension: this allows for an innovative account of key concepts of 19th century culture.

The idea of a virtue has traditionally been important in ethics, but only recently has gained attention as an idea that can explain how we ought to form beliefs as well as how we ought to act. Moral philosophers and epistemologists have different approaches to the idea of intellectual virtue; here, Michael DePaul and Linda Zagzebski bring work from both fields together for the first time to address all of the important issues. It will be required reading for anyone working in either field.

Evidentialism is a theory of knowledge whose essence is the traditional idea that the justification of factual knowledge is entirely a matter of evidence. Earl Conee and Richard Feldman present the definitive exposition and defence of this much-contested theory. They argue that evidentialism is an asset virtually everywhere in epistemology, from getting started legitimately to refuting skepticism. The volume collects the authors' renowned work on the topic and adds substantial new material, making it the prime resource in evidentialism for all epistemologists.

Virtue Epistemology is a new movement receiving much recent attention from top epistemologists and ethicists; this volume reflects the best work in that vein. Included are unpublished articles by such eminent philosophers as Robert Audi, Simon Blackburn, Alvin Goldman, Christopher Hookway, Keith Lehrer, and Ernest Sosa.

This book is a sustained analytical exploration of the rich philosophy of self of the Portuguese poet Fernando Pessoa. Fernando Pessoa (1888-1935) has become many things to many people in the years that have passed since his untimely death. For some he is simply the greatest Portuguese poet of the 20th century. For others he has gradually emerged as a forgotten voice in 20th century modernism. And yet Pessoa was also a philosopher, and it is only very recently that the philosophical importance of his work has begun to attract the attention it deserves. Pessoa composed systematic philosophical essays in his pre-heteronymic period, defending rationalism in epistemology and sensationism in the philosophy of mind. His heteronymic work, decisively breaking with the conventional strictures of systematic philosophical writing, is a profound and exquisite exploration in the philosophy of self. Virtual Subjects, Fugitive Selves pulls together the strands of this philosophy and rearticulates it in a way that does justice to its breathtaking originality. It reveals the extraordinary power of Pessoa's theory by applying it to the analysis of some of the trickiest and most puzzling problems about the self to have appeared in the global history of philosophy.

The Realm of Reason develops a new, general theory of what it is for a thinker to be entitled to form a given belief. The theory locates entitlement in the nexus of relations between truth, content, and understanding. Peacocke formulates three principles of rationalism that articulate this conception. The principles imply that all entitlement has a component that is justificationally independent of experience. The resulting position is thus a form of rationalism, generalized to all kinds of content.
To show how these principles are realized in specific domains, Peacocke applies the theory in detail to several classical problems of philosophy, including the nature of perceptual entitlement, induction, and the status of moral thought. These discussions involve an elaboration of the structure of entitlement in ways that have applications in many other areas of philosophy. He also relates the theory to classical and recent rationalist thought, and to current issues in the theory of meaning, reference and explanation. In the course of these discussions, he proposes a general theory of the a priori.
The focus of the work lies in the intersection of epistemology, metaphysics, and the theory of meaning, and will be of interest both to students and researchers in these areas, and to anyone concerned with the idea of rationality.

Reprint of the first American edition. One of the most interesting jurists of the post-World War II era, Ross [1899-1979] was a legal and moral philosopher, scholar of international law and the leading representative of Scandinavian Legal Realism. This book and On Law and Justice (1958) are his principal works. In Directives and Norms Ross asks whether imperatives (or, to use his term, 'directives') are subject to logic in the same way as indicatives. He shows the difference between indicative and directive discourse and explains the concepts 'directive' and 'norm' as they function in the social sciences, especially in the study of law. A contemporary essay in the Modern Law Review (32:544), though critical of this work, was still impressed by its "clear and convincing account" of these processes.

Isaac Levi's new book develops further his pioneering work in formal epistemology, focusing on the problem of belief contraction, or how rationally to relinquish old beliefs. Levi offers the most penetrating analysis to date of this key question in epistemology, offering a completely new solution and explaining its relation to his earlier proposals. He mounts an argument in favour of the thesis that contracting a state of belief by giving up specific beliefs is to be evaluated in terms of the value of the information lost by doing so. The rationale aims to be thoroughly decision theoretic. Levi spells out his goals and shows that certain types of recommendations are obtained if one seeks to promote these goals. He compares his approach to his earlier account of inductive expansion. The recommendations are for 'mild contractions'. These are formally the same as the 'severe withdrawals' considered by Pagnucco and Rott. The rationale, however, is different. A critical part of the book concerns the elaboration of these differences. The results are relevant to accounts of the conditions under which it is legitimate to cease believing and to accounts of conditionals. Mild Contraction will be of great interest to all specialists in belief revision theory and to many students of formal epistemology, philosophy of science, and pragmatism.

The main work of Immanuel Kant in which he argues that the mind forms its own experiences. These experiences are thus only as perceiving the phenomenal world and not experiencing the world around us as it truly is. He tries to combat the critique that such a view holds and to put the use of reason to justify our experiences by showing that we never truly experience what we perceive.

This book deals with a topic that has been largely neglected by philosophers of science to date: the ability to refer and analyze in tandem. On the basis of a set of philosophical case studies involving both problems in number theory and issues concerning time and cosmology from the era of Galileo, Newton and Leibniz up through the present day, the author argues that scientific knowledge is a combination of accurate reference and analytical interpretation. In order to think well, we must be able to refer successfully, so that we can show publicly and clearly what we are talking about. And we must be able to analyze well, that is, to discover productive and explanatory conditions of intelligibility for the things we are thinking about. The book's central claim is that the kinds of representations that make successful reference possible and those that make successful analysis possible are not the same, so that significant scientific and mathematical work typically proceeds by means of a heterogeneous discourse that juxtaposes and often superimposes a variety of kinds of representation, including formal and natural languages as well as more iconic modes. It demonstrates the virtues and necessity of heterogeneity in historically central reasoning, thus filling an important gap in the literature and fostering a new, timely discussion on the epistemology of science and mathematics.

This book argues against the common view that there are no essential differences between Plato and the Neoplatonist philosopher, Plotinus, on the issues of mysticism, epistemology, and ethics. Beginning by examining the ways in which Plato and Plotinus claim that it is possible to have an ultimate experience that answers the most significant philosophical questions, David J. Yount provides an extended analysis of why we should interpret both philosophers as mystics. The book then moves on to demonstrate that both philosophers share a belief in non-discursive knowledge and the methods to attain it, including dialectic and recollection, and shows that they do not essentially differ on any significant views on ethics. Making extensive use of primary and secondary sources, Plato and Plotinus on Mysticism, Epistemology and Ethics shows the similarities between the thought of these two philosophers on a variety of philosophical questions, such as meditation, divination, wisdom, knowledge, truth, happiness and love.

Paul Abela presents a powerful, experience-sensitive form of realism about the relation between mind and world, based on an innovative interpretation of Kant. Abela breaks with tradition in taking seriously Kant's claim that his Transcendental Idealism yields a form of empirical realism, and giving a realist analysis of major themes of the Critique of Pure Reason. Abela's blending of Kantian scholarship with contemporary epistemology offers a new way of resolving philosophical debates about realism.

This book collects research papers on the philosophical foundations of probability, causality, spacetime and quantum theory. The papers are related to talks presented in six subsequent workshops organized by The Budapest-Krakow Research Group on Probability, Causality and Determinism. Coverage consists of three parts. Part I focuses on the notion of probability from a general philosophical and formal epistemological perspective. Part II applies probabilistic considerations to address causal questions in the foundations of quantum mechanics. Part III investigates the question of indeterminism in spacetime theories. It also explores some related questions, such as decidability and observation. The contributing authors are all philosophers of science with a strong background in mathematics or physics. They believe that paying attention to the finer formal details often helps avoiding pitfalls that exacerbate the philosophical problems that are in the center of focus of contemporary research. The papers presented here help make explicit the mathematical-structural assumptions that underlie key philosophical argumentations. This formally rigorous and conceptually precise approach will appeal to researchers and philosophers as well as mathematicians and statisticians.