The justification of Bayes' rule by cognitive rationality principles is undertaken by extending the propositional axiom systems usually proposed in two contexts of belief change: revising and updating. Probabilistic belief change axioms are introduced, either by direct transcription of the set-theoretic ones, or in a stronger way but nevertheless in the spirit of the underlying propositional principles. Weak revising axioms are shown to be satisfied by a General Conditioning rule, extending Bayes' rule but also compatible with others, and weak updating (...) axioms by a General Imaging rule, extending Lewis' rule. Strong axioms (equivalent to the Miller–Popper axiom system) are necessary to justify Bayes' rule in a revising context, and justify in fact an extended Bayes' rule which applies, even if the message has zero probability. (shrink)

The justification of Bayes' rule by cognitive rationality principles is undertaken by extending the propositional axiom systems usually proposed in two contexts of belief change: revising and updating. Probabilistic belief change axioms are introduced, either by direct transcription of the set-theoretic ones, or in a stronger way but nevertheless in the spirit of the underlying propositional principles. Weak revising axioms are shown to be satisfied by a General Conditioning rule, extending Bayes' rule but also compatible with others, and weak updating (...) axioms by a General Imaging rule, extending Lewis' rule. Strong axioms (equivalent to the Miller–Popper axiom system) are necessary to justify Bayes' rule in a revising context, and justify in fact an extended Bayes' rule which applies, even if the message has zero probability. (shrink)

Despite its importance in various fields, analogical reasoning has not yet received a unified formal representation. Our contribution proposes a general scheme of inference that is compatible with different types of logic (deductive, probabilistic, non-monotonic). Firstly, analogical assessment precisely defines the similarity of two objects according to their properties, in a relative rather than absolute way. Secondly, analogical inference transfers a new property from one object to a similar one, thanks to an over-hypothesis linking two sets of properties. The belief (...) strength in the conclusion is then directly related to the belief strength in this meta-hypothesis. (shrink)

Abduction was first introduced in the epistemological context of scientific discovery. It was more recently analyzed in artificial intelligence, especially with respect to diagnosis analysis or ordinary reasoning. These two fields share a common view of abduction as a general process of hypotheses formation. More precisely, abduction is conceived as a kind of reverse explanation where a hypothesis H can be abduced from events E if H is a good explanation of E. The paper surveys four known schemes for abduction (...) that can be used in both fields. Its first contribution is a taxonomy of these schemes according to a common semantic framework based on belief revision. Its second contribution is to produce, for each non-trivial scheme, a representation theorem linking its semantic framework to a set of postulates. Its third contribution is to present semantic and axiomatic arguments in favor of one of these schemes, ordered abduction, which has never been vindicated in the literature. (shrink)

Two main schemes explain how a system adapts to its environment. Evolutionary models are grounded on three usual processes (variation, transmission, selection) acting at the population level. Learning models are concerned with the endogenous search for a better performance at the individual level. The first ones were initially favored by biology and the second well illustrated by game theory. The article examines first how game theory went to evolution and how biology later considered learning. It shows some examples of a (...) hybrid use of models of each type. It finally proposes a common framework for both types of models. (shrink)

L’article propose d’abord une version simplifiée d’une ontologie universelle, conçue comme un cadre général de description du monde matériel et mental. Il examine les notions d’entité, de propriété, de relation et de temporalité et leurs développements conjoints en termes de rapport entre les parties et le tout ou encore d’émergence d’une entité nouvelle. Il illustre ensuite les principes précédents en ce qui concerne la science économique, dont les entités de base sont les agents, les biens et les institutions. Il insiste (...) sur le couplage que cette dernière réalise entre leurs propriétés physiques ou psychologiques et le raisonnement qu’elle propose en termes d’équilibre et plus récemment d’apprentissage. Classification JEL : A12. (shrink)

RésuméEn dépit de son importance dans divers domaines, le raisonnement analogique n'a pas encore reçu de représentation formelle unifiée. Notre contribution propose un schéma d'inférence général, compatible avec différentes logiques (déductive, probabiliste, non monotone). Premièrement, un énoncé analogique définit précisément la similarité entre deux objets en fonction de leurs propriétés, de façon relative et non absolue. Deuxièmement, une inférence analogique transfère une propriété nouvelle d'un objet à un objet similaire, grâce à une hypothèse d'arrière-plan qui relie deux ensembles de propriétés. (...) Le degré de croyance dans la conclusion est alors directement relié au degré de croyance dans cette méta-hypothèse. (shrink)

The Sleeping Beauty problem is presented in a formalized framework which summarizes the underlying probability structure. The two rival solutions proposed by Elga and Lewis differ by a single parameter concerning her prior probability. They can be supported by considering, respectively, that Sleeping Beauty is “fuzzy-minded” and “blank-minded”, the first interpretation being more natural than the second. The traditional absent -minded driver problem is reinterpreted in this framework and sustains Elga’s solution.

The paper studies a specific adaptive learning rule when each player faces a unidimensional strategy set. The rule states that a player keeps on incrementing her strategy in the same direction if her utility increased and reverses direction if it decreased. The paper concentrates on games on the square [0,1]×[0,1]\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$[0,1]\times [0,1]$$\end{document} as mixed extensions of 2×2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$2\times 2$$\end{document} games. We study in general the (...) behavior of the system in the interior as well as on the borders of the strategy space. We then describe the system asymptotic behavior for symmetric, zero-sum, and twin games. Original patterns emerge. For instance, for the “prisoner’s dilemma” with symmetric initial conditions, the system goes directly to the symmetric Pareto optimum. For “matching pennies,” the system follows slowly expanding cycles around the mixed strategy equilibrium. (shrink)

Moral problems do not always come in the form of great social controversies. More often, the moral decisions we make are made quietly, constantly, and within the context of everyday activities and quotidian dilemmas. Indeed, these smaller decisions are based on a moral foundation that few of us ever stop to think about but which guides our every action. Here distinguished philosopher Bernard Gert presents a clear and concise introduction to what he calls "common morality" -- the moral system (...) that most thoughtful people implicitly use when making everyday, common sense moral decisions and judgments. Common Morality is useful in that -- while not resolving every disagreement on controversial issues -- it is able to distinguish between acceptable and unacceptable answers to moral problems. In the first part of the book Gert lays out the fundamental features of common morality: moral rules, moral ideals, and a two-step procedure for determining when a violation of a moral rule is justified. Written in a non-technical style, the ten general moral rules include rules on which everyone can agree, such as "do not kill," "do not deceive," and "keep your promises." The moral ideals include similarly uncontroversial precepts such as "Relieve pain" and "Aid the needy." In the second part of the book Gert examines the underlying concepts that justify common morality, such as the notions of rationality and impartiality. The distillation of over 40 years of scholarship, this book is the most accessible version of Gert's influential theory of morality as well as an eye-opening look at the moral foundations of our everyday actions. Throughout the discussion is clear enough for a reader with little or no philosophy background. (shrink)

By the time of his death in 2003, Bernard Williams was one of the greatest philosophers of his generation. Ethics and the Limits of Philosophy is not only widely acknowledged to be his most important book, but also hailed a contemporary classic of moral philosophy. Presenting a sustained critique of moral theory from Kant onwards, Williams reorients ethical theory towards ‘truth, truthfulness and the meaning of an individual life’. He explores and reflects upon the most difficult problems in contemporary (...) philosophy and identifies new ideas about central issues such as relativism, objectivity and the possibility of ethical knowledge. This edition also includes a new commentary on the text by A.W.Moore and a foreword by Jonathan Lear. (shrink)

By the time of his death in 2003, Bernard Williams was one of the greatest philosophers of his generation. Ethics and the Limits of Philosophy is not only widely acknowledged to be his most important book, but also hailed a contemporary classic of moral philosophy. Presenting a sustained critique of moral theory from Kant onwards, Williams reorients ethical theory towards ‘truth, truthfulness and the meaning of an individual life’. He explores and reflects upon the most difficult problems in contemporary (...) philosophy and identifies new ideas about central issues such as relativism, objectivity and the possibility of ethical knowledge. (shrink)

This edition includes, in addition to the most pertinent sections of The Fable's two volumes, a selection from Mandeville's An Enquiry into the Origin of Honor and selections from two of Mandeville's most important sources: Pierre Bayle and the Jansenist Pierre Nicole. Hundert's Introduction places Mandeville in a number of eighteenth-century debates--particularly that of the nature and morality of commercial modernity--and underscores the degree to which his work stood as a central problem, not only for his immediate English contemporaries, but (...) for such philosophers as Hume, Rousseau, and Kant. The selections are substantive enough to faithfully represent Mandeville the social theorist, and compact enough to be used in courses that can afford to spend no more than a week on his work. (shrink)

Descartes has often been called the 'father of modern philosophy'. His attempts to find foundations for knowledge, and to reconcile the existence of the soul with the emerging science of his time, are among the most influential and widely studied in the history of philosophy. This is a classic and challenging introduction to Descartes by one of the most distinguished modern philosophers. Bernard Williams not only analyzes Descartes' project of founding knowledge on certainty, but uncovers the philosophical motives for (...) his search. With acute insight, he demonstrates how Descartes' _Meditations _are not merely a description but the very enactment of philosophical thought and discovery. Williams covers all of the key areas of Descartes' thought, including God, the will, the possibility of knowledge, and the mind and its place in nature. He also makes profound contributions to the theory of knowledge, metaphysics and philosophy generally. With a new foreword by John Cottingham. (shrink)

With a new foreword by Jonathan Lear 'Remarkably lively and enjoyable…It is a very rich book, containing excellent descriptions of a variety of moral theories, and innumerable and often witty observations on topics encountered on the way.' -_ Times Literary Supplement_ Bernard Williams was one of the greatest philosophers of his generation. Ethics and the Limits of Philosophy is not only widely acknowledged to be his most important book, but also hailed a contemporary classic of moral philosophy. Drawing on (...) the ideas of the Greek philosophers, Williams reorients ethics away from a preoccupation with universal moral theories towards ‘truth, truthfulness and the meaning of an individual life’. He explores and reflects upon the most difficult problems in contemporary philosophy and identifies new ideas about central issues such as relativism, objectivity and the possibility of ethical knowledge. This edition also includes a commentary on the text by A.W.Moore. At the time of his death in 2003, Bernard Williams was hailed by the Times as 'the outstanding moral philosopher of his age.' He taught at the Universities of Cambridge, Berkeley and Oxford and is the author of many influential books, including _Morality; Descartes: The Project of Pure Enquiry_ and _Truth and Truthfulness_. (shrink)

Le polythéisme polynésien était-il une forme métaphorique de panthéisme ?

How I became a philosopher -- To love, to love me, to love us.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain (...) in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant. (shrink)

We tend to suppose that the ancient Greeks had primitive ideas of the self, of responsibility, freedom, and shame, and that now humanity has advanced from these to a more refined moral consciousness. Bernard Williams's original and radical book questions this picture of Western history. While we are in many ways different from the Greeks, Williams claims that the differences are not to be traced to a shift in these basic conceptions of ethical life. We are more like the (...) ancients than we are prepared to acknowledge, and only when this is understood can we properly grasp our most important differences from them, such as our rejection of slavery. The author is a philosopher, but much of his book is directed to writers such as Homer and the tragedians, whom he discusses as poets and not just as materials for philosophy. At the center of his study is the question of how we can understand Greek tragedy at all, when its world is so far from ours. Williams explains how it is that when the ancients speak, they do not merely tell us about themselves, but about ourselves. _Shame and Necessity_ gives a new account of our relations to the Greeks, and helps us to see what ethical ideas we need in order to live in the modern world. (shrink)

In the mid twentieth century the philosopher Ludwig Wittgenstein famously asserted that games are indefinable; there are no common threads that link them all. "Nonsense," says the sensible Bernard Suits: "playing a game is a voluntary attempt to overcome unnecessary obstacles." The short book Suits wrote demonstrating precisely that is as playful as it is insightful, as stimulating as it is delightful. Suits not only argues that games can be meaningfully defined; he also suggests that playing games is a (...) central part of the ideal of human existence, so games belong at the heart of any vision of Utopia. Originally published in 1978, The Grasshopper is now re-issued with a new introduction by Thomas Hurka and with additional material (much of it previously unpublished) by the author, in which he expands on the ideas put forward in The Grasshopper and answers some questions that have been raised by critics. (shrink)

Bernard Williams's remarkable essay on morality confronts the problems of writing moral philosophy, and offers a stimulating alternative to more systematic accounts which seem nevertheless to have left all the important issues somewhere off the page. Williams explains, analyses and distinguishes a number of key positions, from the purely amoral to notions of subjective or relative morality, testing their coherence before going on to explore the nature of 'goodness' in relation to responsibilities and choice, roles, standards, and human nature. (...) The final chapters make a fascinating enquiry into what morality is about, looking beyond happiness to other human aims and ideals. This re-issue of a classic in moral philosophy includes a new foreword by the author. (shrink)

An updated and expanded successor to Culver and Gert's Philosophy in Medicine, this book integrates moral philosophy with clinical medicine to present a comprehensive summary of the theory, concepts, and lines of reasoning underlying the ...

Conceptual Foundations of Quantum Mechanics provides a detailed view of the conceptual foundations and problems of quantum physics, and a clear and comprehensive account of the fundamental physical implications of the quantum formalism. This book deals with nonseparability, hidden variable theories, measurement theories and several related problems. Mathematical arguments are presented with an emphasis on simple but adequately representative cases. The conclusion incorporates a description of a set of relationships and concepts that could compose a legitimate view of the world.

This book offers the fullest and most sophisticated account of Gert's influential moral theory, a model first articulated in the classic work The Moral Rules: A New Rational Foundation for Morality, published in 1970. In this final revision, Gert makes clear that the moral rules are only one part of an informal system that does not provide unique answers to every moral question but does always provide a range of morally acceptable options. A new chapter on reasons includes an account (...) of what makes one reason better than another and a second new chapter is devoted to the question of justifying violations of the rules. Moral impartiality, the moral ideals, and virtue and vice, are all treated in greater detail. Throughout, Gert attempts to answer all of the challenges that his work has provoked. (shrink)

Originally published in 1910, Principia Mathematica led to the development of mathematical logic and computers and thus to information sciences. It became a model for modern analytic philosophy and remains an important work. In the late 1960s the Bertrand Russell Archives at McMaster University in Canada obtained Russell's papers, letters and library. These archives contained the manuscripts for the new Introduction and three Appendices that Russell added to the second edition in 1925. Also included was another manuscript, 'The Hierarchy of (...) Propositions and Functions', which was divided up and re-used to create the final changes for the second edition. These documents provide fascinating insight, including Russell's attempts to work out the theorems in the flawed Appendix B, 'On Induction'. An extensive introduction describes the stages of the manuscript material on the way to print and analyzes the proposed changes in the context of the development of symbolic logic after 1910. (shrink)

This new volume of philosophical papers by Bernard Williams is divided into three sections: the first Action, Freedom, Responsibility, the second Philosophy, Evolution and the Human Sciences; in which appears the essay which gives the collection its title; and the third Ethics, which contains essays closely related to his 1983 book Ethics and the Limits of Philosophy. Like the two earlier volumes of Williams's papers published by Cambridge University Press, Problems of the Self and Moral Luck, this volume will (...) be welcomed by all readers with a serious interest in philosophy. It is published alongside a volume of essays on Williams's work, World, Mind, and Ethics: Essays on the Ethical Philosophy of Bernard Williams, edited by J. E. J. Altham and Ross Harrison, which provides a reappraisal of his work by other distinguished thinkers in the field. (shrink)

The main idea -- The functioning of a neuron -- Brain structure and function -- The general structure of the neural network -- Instincts, emotions, free will -- The nature of mental objects -- The rise and essence of (self-)consciousness -- Artificial intelligence -- Cognitive limitations of man.

Bernard Williams; XIV*—The Truth in Relativism, Proceedings of the Aristotelian Society, Volume 75, Issue 1, 1 June 1975, Pages 215–228, https://doi.org/10.1093.

This book explores the possible relations between Western types of rationality and Buddhism. It also examines some cliche;s about Buddhism and questions the old antinomies of Western culture (“faith and reason,” or “idealism and materialism”). The use of the Buddhist notion of the Two Truths as a hermeneutic device leads to a double or multiple exposure that will call into question our mental habits and force us to ask questions differently, to think “in a new key.” Double Exposure is somewhat (...) of an oddity. Written by a specialist for nonspecialists, it is not a book of vulgarization. Although it aims at a better integration of Western and Buddhist thought, it is not an exercise in comparative philosophy or religion. It is neither a contribution to Buddhist scholarship in the narrow sense, nor a contribution to some vague Western “spirituality.” Cutting across traditional disciplines and blurring established genres, it provides a leisurely but deeply insightful stroll through philosophical and literary texts, dreams, poetry, and paradoxes. (shrink)

I. Réviser pour développer. 1. Du modèle bergsonien à la révision bergsonienne -- 2. De la révision bergsonienne au développement rationnel -- II. La dialectique généralisée. 1. Réflexions sur les synthèses dialectiques fichtéennes -- 2. Réflexions sur Schelling au temps de l'idéalisme transcendantal -- 3. Réflexions sur les dialectiques hégéliennes -- III. Les dialectiques juridiques. 1. L'approbation du contrat social par Kant et Fichte -- 2. Le refus de contrat social par Hegel.