Epistemic Defeat

A number of well-developed theories shed light on the question, under what circumstances our beliefs enjoy epistemic justification. Yet, comparatively little is known about epistemic defeat—when new information causes the loss of epistemic justification. This book proposes and defends a detailed account of epistemic defeaters. The main kinds of defeaters are analyzed in detail and integrated into a general framework that aims to explain how beliefs lose justification. It is argued that defeaters introduce incompatibilities into a noetic system and thereby prompt a structured re-evaluation process that makes a justified reinstatement of the defeated belief impossible. The account is then applied to the topic of disagreement, where it is used in an argument for conciliationism, as well as a new explanation for higher-order defeat. Throughout the book, the notion of defeat is the center of attention, while a number of new issues are discussed at the intersections of defeat and justification. Specifically, new problems are raised for broadly internalist accounts of defeat, a fully descriptive reliabilist account of defeat is provided, and the case for normative defeat is revisited.

A number of well-developed theories shed light on the question, under what circumstances our beliefs enjoy epistemic justification. Yet, comparatively little is known about epistemic defeat—when new information causes the loss of epistemic justification. This book proposes and defends a detailed account of epistemic defeaters. The main kinds of defeaters are analyzed in detail and integrated into a general framework that aims to explain how beliefs lose justification. It is argued that defeaters introduce incompatibilities into a noetic system and thereby prompt a structured re-evaluation process that makes a justified reinstatement of the defeated belief impossible. The account is then applied to the topic of disagreement, where it is used in an argument for conciliationism, as well as a new explanation for higher-order defeat. Throughout the book, the notion of defeat is the center of attention, while a number of new issues are discussed at the intersections of defeat and justification. Specifically, new problems are raised for broadly internalist accounts of defeat, a fully descriptive reliabilist account of defeat is provided, and the case for normative defeat is revisited.

This book is concerned with the conditions under which epistemic reasons provide justification for beliefs. The author draws on metaethical theories of reasons and normativity and then applies his theory to various contemporary debates in epistemology. In the first part of the book, the author outlines what he calls the dispositional architecture of epistemic reasons. The author offers and defends a dispositional account of how propositional and doxastic justification are related to one another. He then argues that the dispositional view has the resources to provide an acceptable account of the notion of the basing relation. In the second part of the book, the author examines how his theory of epistemic reasons bears on the issues involving perceptual reasons. He defends dogmatism about perceptual justification against conservatism and shows how his dispositional framework illuminates certain claims of dogmatism and its adherence to justification internalism. Finally, the author applies his dispositional framework to epistemological topics including the structure of defeat, self-knowledge, reasoning, emotions and motivational internalism. The Dispositional Architecture of Epistemic Reasons demonstrates the value of employing metaethical considerations for the justification of beliefs and propositions. It will be of interest to scholars and advanced students working in epistemology and metaethics.

Alvin Plantinga is arguably one of the most influential philosophers of our time. Much of his career has been devoted to explaining and defending the intellectual acceptability of Christian belief. Recently he has developed a comprehensive, rigorous, and distinctively Christian religious epistemology. This book presents the development of Plantinga's religious epistemology before considering Plantinga's mature religious epistemology in detail. Locating Plantinga's most recent work in the context of his theological assumptions, his previous work on religious epistemology, and in the context of the current debate over how knowledge should be characterized, Beilby blends theological and philosophical discussion to offer a unique perspective on Plantinga's influential proposal.

A central conclusion developed and defended throughout the book is that epistemic autonomy is necessary for knowledge (both knowledge-that and knowledge-how) and in ways that epistemologists have not yet fully appreciated. The book is divided into five chapters. Chapter 1 motivates (using a series of twists on Lehrer's TrueTemp case) the claim that propositional knowledge requires autonomous belief. Chapters 2 and 3 flesh out this proposal in two ways, by defending a specific form of history-sensitive externalism with respect to propositional knowledge-apt autonomous belief (Chapter 2) and by showing how the idea that knowledge requires autonomous belief—understood along the externalist lines proposed—corresponds with an entirely new class of knowledge defeaters (Chapter 3). Chapter 4 extends the proposal to (both intellectualist and anti-intellectualist) knowledge-how and performance enhancement, and in a way that combines insights from virtue epistemology with research on freedom, responsibility, and manipulation. Chapter 5 concludes with a new twist on the Value of Knowledge debate, by vindicating the value of epistemically autonomous knowledge over that which falls short, including (mere) heteronomous but otherwise epistemically impeccable justified true belief.

This book explores a topic that has recently become the subject of increased philosophical interest: how can imagination be put to epistemic use? Though imagination has long been invoked in contexts of modal knowledge, in recent years philosophers have begun to explore its capacity to play an epistemic role in a variety of other contexts as well. In this collection, the contributors address an assortment of issues relating to epistemic uses of imagination, and in particular, they take up the ways in which our imaginings must be constrained so as to justify beliefs and give rise to knowledge. These constraints are explored across several different contexts in which imagination is appealed to for justification, namely reasoning, modality and modal knowledge, thought experiments, and knowledge of self and others. Taken as a whole, the contributions in this volume break new ground in explicating when and how imagination can be epistemically useful. Epistemic Uses of Imagination will be of interest to scholars and advanced students who are working on imagination, as well as those working more broadly in epistemology, aesthetics, and philosophy of mind. Chapters 6 and 12 of this book are freely available as downloadable Open Access PDFs at http://www.taylorfrancis.com under a Creative Commons Attribution-Non Commercial-No Derivatives (CC-BY-NC-ND) 4.0 license.

Traditionally, the notion of defeat has been central to epistemology, practical reasoning, and ethics. Within epistemology, it is standardly assumed that a subject who knows that p, or justifiably believes that p, can lose this knowledge or justified belief by acquiring a so-called 'defeater', whether that is evidence that not-p, evidence that the process that produced her belief is unreliable, or evidence that she has likely misevaluated her own evidence. Within ethics and practical reasoning, it is widely accepted that a subject may initially have a reason to do something although this reason is later defeated by her acquisition of further information. However, the traditional conception of defeat has recently come under attack. Some have argued that the notion of defeat is problematically motivated; others that defeat is hard to accommodate within externalist or naturalistic accounts of knowledge or justification; and still others that the intuitions that support defeat can be explained in other ways. This volume presents new work re-examining the very notion of defeat, and its place in epistemology and in normativity theory at large.

Discovering someone disagrees with you is a common occurrence. The question of epistemic significance of disagreement concerns how discovering that another disagrees with you affects the rationality of your beliefs on that topic. This book examines the answers that have been proposed to this question, and presents and defends its own answer.