In this paper we explore a class of belief update operators, in which the definition of the operator is compositional with respect to the sentence to be added. The goal is to provide an update operator that is intuitive, in that its definition is based on a recursive decomposition of the update sentence’s structure, and that may be reasonably implemented. In addressing update, we first provide a definition phrased in terms of the models of a knowledge base. While this operator (...) satisfies a core group of the benchmark Katsuno Mendelzon update postulates, not all of the postulates are satisfied. Other Katsuno Mendelzon postulates can be obtained by suitably restricting the syntactic form of the sentence for update, as we show. In restricting the syntactic form of the sentence for update, we also obtain a hierarchy of update operators with Winslett’s standard semantics as the most basic interesting approach captured. We subsequently give an algorithm which captures this approach; in the general case the algorithm is exponential, but with some not unreasonable assumptions we obtain an algorithm that is linear in the size of the knowledge base. Hence the resulting approach has much better complexity characteristics than other operators in some situations. We also explore other compositional belief change operators: erasure is developed as a dual operator to update; we show that a forget operator is definable in terms of update; and we give a definition of the compositional revision operator. We obtain that compositional revision, under the most natural definition, yields the Satoh revision operator. (shrink)

We investigate the notion of relevance as it pertains to ‘commonsense’, subjunctive conditionals. Relevance is taken here as a relation between a property (such as having a broken wing) and a conditional (such as birds typically fly). Specifically, we explore a notion of ‘causative’ relevance, distinct from ‘evidential’ relevance found, for example, in probabilistic approaches. A series of postulates characterising a minimal, parsimonious concept of relevance is developed. Along the way we argue that no purely logical account of relevance (even (...) at the metalevel) is possible. Finally, and with minimal restrictions, an explicit definition that agrees with the postulates is given. (shrink)

This paper describes an approach for reasoning in a dynamic domain with nondeterministic actions in which an agent’s beliefs correspond to the simplest, or most plausible, course of events consistent with the agent’s observations and beliefs. The account is based on an epistemic extension of the situation calculus, a first-order theory of reasoning about action that accommodates sensing actions. In particular, the account is based on a qualitative theory of nondeterminism. Our position is that for commonsense reasoning, the world is (...) most usefully regarded as deterministic, and that nondeterminism is an epistemic phenomenon, arising from an agent’s limited awareness and perception. The account offers several advantages: an agent has a set of categorical beliefs, yet can deal with equally-likely outcomes or with outcomes of differing plausibility. The agent maintains as its set of contingent beliefs the most plausible, or simplest, picture of the world, consistent with its beliefs and actions it believes it executed; yet it may modify these in light of later information. (shrink)

One of the standard principles of rationality guiding traditional accounts of belief change is the principle of minimal change: a reasoner's belief corpus should be modified in a minimal fashion when assimilating new information. This rationality principle has stood belief change in good stead. However, it does not deal properly with all belief change scenarios. We introduce a novel account of belief change motivated by one of Grice's maxims of conversational implicature: the reasoner's belief corpus is modified in a minimal (...) fashion to assimilate exactly the new information. In this form of belief change, when the reasoner revises by new information p ∨ q their belief corpus is modified so that p∨q is believed but stronger propositions like p∧q are not, no matter what beliefs are in the reasoner's initial corpus. We term this conservative belief change since the revised belief corpus is a conservative extension of the original belief corpus given the new information. (shrink)

This special issue presents a selection of papers in Knowledge Representation in Artificial Intelligence , intended to illustrate the depth and breadth of current research in the area. It comes just over 25 years since a similar special issue of the Journal of Philosophical Logic appeared on the topic Philosophical Logic and Artificial Intelligence [15]. This latter special issue covered work addressing the use of logic, in one form or another, for representing and reasoning with knowledge. The papers of the (...) 1988 special issue give a good indication of major themes of research at the time: reasoning about belief and knowledge [5], tractable logical reasoning [10], nonmonotonicity [11], and reasoning about action [13]. These topics can be considered to be centrally in KR; the current issue then also serves to indicate how the field has broadened and evolved over the last 25 years.Traditionally the area of Knowledge Representation has been seen as “the field of study concerned w .. (shrink)

Consistency-based approaches in nonmonotonic reasoning may be expected to yield multiple sets of default conclusions for a given default theory. Reasoning about such extensions is carried out at the meta-level. In this paper, we show how such reasoning may be carried out at the object level for a large class of default theories. Essentially we show how one can translate a default theory Δ, obtaining a second Δ', such that Δ has a single extension that encodes every extension of _. (...) Moreover, our translated theory is only a constant factor larger than the original. We prove that our translation behaves correctly. In the approach we can now encode the notion of extension from within the framework of standard default logic. Hence one can encode notions such as skeptical and credulous conclusions, and can reason about such conclusions within a single extension. This result has some theoretical interest, in that it shows how multiple extensions of semi-monotonic default theories are encodable with manageable overhead in a single extension. (shrink)

The contributions to the Special Issue on Multiple Belief Change, Iterated Belief Change and Preference Aggregation are divided into three parts. Four contributions are grouped under the heading "multiple belief change" (Part I, with authors M. Falappa, E. Fermé, G. Kern-Isberner, P. Peppas, M. Reis, and G. Simari), five contributions under the heading "iterated belief change" (Part II, with authors G. Bonanno, S.O. Hansson, A. Nayak, M. Orgun, R. Ramachandran, H. Rott, and E. Weydert). These papers do not only pick (...) up the particular questions raised, but also extend and modify the framework of Alchourrón, Gärdenfors and Makinson. Part III deals with preference aggregation and consists of one contribution (by F. Herzberg and D. Eckert). (shrink)

Abstract.The paper outlines the approach to the analysis of deontic conditionals taken in earlier work by Jones and Pörn, compares it very briefly with two main trends within dyadic deontic logic, and then discusses problems associated with the augmentation principle and the factual detachment principle. The author then modifies Jones and Pörn's previous system, using a classical but not normal (in the sense of Chellas) deontic modality to provide the basis for an alternative analysis of deontic conditionals. This new analysis (...) validates neither the factual detachment nor the augmentation principles. However, influenced by the approach of James Delgrande to default reasoning, the author tries to show how a restricted form of factual detachment may be accommodated within the revised system. (shrink)

What Is Biodiversity? is a theoretical and conceptual exploration of the biological world and how diversity is valued. Maclaurin and Sterelny explore not only the origins of the concept of biodiversity, but also how that concept has been shaped by ecology and more recently by conservation biology. They explain the different types of biodiversity important in evolutionary theory, developmental biology, ecology, morphology and taxonomy and conclude that biological heritage is rich in not just one biodiversity but many. Maclaurin and Sterelny (...) also explore the case for the conservation of these biodiversities using option value theory, a tool borrowed from economics. (shrink)

“William James is a towering figure in the history of American thought--without doubt the foremost psychologist this country has produced. His depiction of mental life is faithful, vital, and subtle. In verve, he has no equal.... “There is a sharp contrast between the expanding horizon of James and the constricting horizon of much contemporary psychology. The one opens doors to discovery, the other closes them. Much psychology today is written in terms of reaction, little in terms of becoming. (...) James would say that a balance is needed, but that only by assuming that man has the capacity for growth are we likely to discover the scope of this same capacity.” —from the introduction by Gordon W. Allport. (shrink)

In addition to being one of the world's most influential philosophers, Aristotle can also be credited with the creation of both the science of biology and the philosophy of biology. He was the first thinker to treat the investigations of the living world as a distinct inquiry with its own special concepts and principles. This book focuses on a seminal event in the history of biology - Aristotle's delineation of a special branch of theoretical knowledge devoted to the systematic investigation (...) of animals. Aristotle approached the creation of zoology with the tools of subtle and systematic philosophies of nature and of science that were then carefully tailored to the investigation of animals. The papers collected in this volume, written by a pre-eminent figure in the field of Aristotle's philosophy and biology, examine Aristotle's approach to biological inquiry and explanation, his concepts of matter, form and kind, and his teleology. (shrink)

In this, the first of two ground-breaking volumes on the nature of language in the light of the way it evolved, James Hurford looks at how the world first came ...

I draw together some recent literature on the debate between dynamical versus geometrical approaches to spacetime theories, in order to argue that there exist defensible versions of the geometr...

How should we understand the special way in which two people are connected when they make eye contact? In this paper, I argue that existing accounts of eye contact —Peacocke’s Reductive Approach and Eilan’s Second Person Approach— are unsatisfactory. In doing so, I make a case for thinking that the source of this dissatisfaction and the path forward can be identified by reflecting on our tendency to describe eye contact on the model of touch. On this basis, I outline a (...) ‘Transactional Approach’ to eye contact. (shrink)

Scientism is usually thought of as sinful, but it can be redeemed for our salvation. Scientism should not be dogmatic, nor should it ignore the actual limitations to current science. Other modes of inquiry deserve epistemic respect, and scientists should not be deferred to about matters beyond their expertise. However, limits should not be placed on what science can study and we cannot say in advance what the limits of future science will be. Where science conflicts with common sense, religion, (...) and tradition, it should be regarded as authoritative for the purposes of education and public policy as well as objective inquiry; and scientific knowledge is even relevant to moral and political deliberation. This is the core of scientism. This chapter elaborates a way of thinking of scientism as a stance characterized in terms of positive and negative components and argues for a humane form of scientism. (shrink)

Throughout his career, Deleuze developed a series of original philosophies of time and applied them successfully to many different fields. Now James Williams presents Deleuze's philosophy of time as the central concept that connects his philosophy as a whole. Through this conceptual approach, the book covers all the main periods of Deleuze's philosophy: the early studies of Hume, Nietzsche, Kant, Bergson and Spinoza, the two great philosophical works, Difference and Repetition and Logic of Sense, the Capitalism and Schizophrenia works (...) with Guattari, and the late influential studies of literature, film and painting.The result is an important reading of Deleuze and the first full interpretation of his philosophy of time. (shrink)

Continuity lies at the heart of the recent naturalistic turn in epistemology. Naturalists are united by a shared commitment to the continuity of science and epistemology, and tend to advocate one or more species of continuity: contextual, semantic, epistemological methodological, metaphysical, and axiological. Naturalists divide, however, over the interpretation and scope of this continuity. The naturalism of Goldman, Kim and Sosa is criticised for leaving meta-epistemology methodologically and epistemologically autonomous from science. A more plausible approach naturalizes epistemology 'all the way (...) up', i.e., including meta-epistemology itself. (shrink)

This is the first critical study of The Logic of Sense, Gilles Deleuze's most important work on language and ethics, as well as the main source of his vital philosophy of the event.James Williams explains the originality of Deleuze's work with careful definitions of all his innovative terms and a detailed description of the complex structure he constructs. This reading makes connections to his ground-breaking work on literature, to his critical but also progressive relation to the sciences, and to (...) his controversial denial of the priority of standard logics, human values and 'meaning' in thinking.This book will open new debates and develop current ones around Deleuze's work in philosophy, politics, literature, linguistics, cultural studies and sociology. (shrink)

Kant's Religion within the Boundaries of Mere Reason is one of the great modern examinations of religion's meaning, function and impact on human affairs. In this volume, the first complete English-language commentary on the work, James J. DiCenso explains the historical context in which the book appeared, including the importance of Kant's conflict with state censorship. He shows how the Religion addresses crucial Kantian themes such as the relationship between freedom and morality, the human propensity to evil, the status (...) of historical traditions in relation to ethical principles, and the interface between individual ethics and social institutions. The major arguments are clearly and precisely explained, and the themes are highlighted and located within Kant's mature critical philosophy, especially his ethics. The commentary will be valuable for all who are interested in the continuing relevance of religion for contemporary inquiries into ethics, public institutions and religious traditions. (shrink)

In this book, James Gordon Finlayson examines the Habermas-Rawls debate in context and considers its wider implications. He traces their dispute from its inception in their earliest works to the 1995 exchange and its aftermath, as well as its legacy in contemporary debates. Finlayson discusses Rawls’s Political Liberalism and Habermas’s Between Facts and Norms, considering them as the essential background to the dispute and using them to lay out their different conceptions of justice, politics, democratic legitimacy, individual rights, and (...) the normative authority of law. He gives a detailed analysis and assessment of their contributions, assessing the strengths and weaknesses of their different approaches to political theory, conceptions of democracy, and accounts of religion and public reason, and he reflects on the ongoing significance of the debate. The Habermas-Rawls Debate is an authoritative account of the crucial intersection of two major political theorists and an explication of why their dispute continues to matter. (shrink)

Our research extends the current understanding of cognitive moral reasoning research by considering the often‐overlooked element of context, specifically the issue presented in the ethical dilemma, and the issue of gender agreement between the subject and the dilemma actor. We rely on gender identity and cognitive moral reasoning theories to provide the theoretical underpinnings of our exploration to deepen our understanding of the contextual forces affecting cognitive moral reasoning. Our results generally confirm earlier research findings and provide valuable information regarding (...) our understanding of the impact of the dilemma context and the gender agreement or disagreement between the subject and the actor in an ethical dilemma, with significance found for four of our five hypotheses, with half of the significant results in the direction predicted. Implications for future academic research and business practice are discussed. (shrink)

(revisions posted 12/5/2006) to appear in Internalism and Externalism in Semantics and Epistemology, ed. by Sanford Goldberg (to be published by Oxford in 2006 or 2007) Michael McKinsey formulated an argument that raises a puzzle about the relation between externalism about content and our introspective awareness of content. The puzzle goes like this: it seems like I can know the contents of my thoughts by introspection alone; but philosophical reflection tells me that the contents of those thoughts are externalist, and (...) so I couldn. (shrink)

Millennials are a powerful workforce group and are quickly becoming established business leaders, consumers, and investors. Yet, millennials are often described as a uniformly homogeneous generation, despite mounting evidence of variances across their private and workplace behaviors, attitudes and preferences, and personal values. This article examines the personal value orientations of millennials in the Unites States, reporting consistencies, variations, and contrasts based on a large sample drawn from seven diverse universities. Results of this article suggest more similarities across a national (...) population of millennials than differences, suggesting a national identity among American millennials. Practical implications of our findings and future research are discussed. (shrink)

A definitive and authoritative guide to a vibrant and growing discipline in current philosophy, The Bloomsbury Companion to Contemporary Philosophy of Medicine presents an overview of the issues facing contemporary philosophy of medicine, the research methods required to understand them and a trajectory for the discipline's future. -/- Written by world leaders in the discipline, this companion addresses the ontological, epistemic, and methodological challenges facing philosophers of medicine today, from the debate between evidence-based and person-centered medicine, medical humanism, and gender (...) medicine, to traditional issues such as disease, health, and clinical reasoning and decision-making. Practical and forward-looking, it also includes a detailed guide to research sources, a glossary of key terms, and an annotated bibliography, as well as an introductory survey of research methods and discussion of new research directions emerging in response to the rapid changes in modern medicine. -/- “Philosophy needs medicine', Hillel Braude argues, 'to become more relevant'. By showing how modern medicine provides philosophers with a rich source of material for investigating issues facing contemporary society, The Bloomsbury Companion to Contemporary Philosophy of Medicine introduces the opportunities medicine offers philosophers together with the resources and skills required to contribute to contemporary debates and discussions. (shrink)

This is the first volume in which an account of personal autonomy is developed that both captures the contours of this concept as it is used in social philosophy and bioethics, and is theoretically grounded in, and a part of, contemporary autonomy theory. James Stacey Taylor’s account is unique as it is explicitly a political one, recognizing that the attribution of autonomy to agents is dependent in part on their relationships with others and not merely upon their own mental (...) states. The volume is distinctive in its examples, which touch on the ethics of using inducements to encourage persons to participate in medical research, the ethical issues associated with the use of antibiotics, and the ethical basis for both patient confidentiality and informed consent. (shrink)

In 'Stakes and Kidneys' the author discusses various ethical issues surrounding the international trade in human organs.

Philosophy and Phenomenological Research, EarlyView.

A personal story of the ways in which persistence, chance, and creativity interact in biomedical research. This first book by the author of Zen and the Brain examines the role of chance in the creative process. James Austin tells a personal story of the ways in which persistence, chance, and creativity interact in biomedical research; the conclusions he reaches shed light on the creative process in any field. Austin shows how, in his own investigations, unpredictable events shaped the outcome (...) of his research and brought about novel results. He then goes beyond this story of serendipity to propose a new classification of the varieties of chance, drawing on his own research and examples from the history of science—including the famous accidents that led Fleming to the discovery of penicillin. Finally, he explores the nature of the creative process, considering not only the environmental and neurophysiological correlates of creativity but also the role of intuition in both scientific discoveries and spiritual quests. This updated MIT Press paperback edition includes a new introduction and recent material on medical research, creativity, and spirituality. (shrink)