Philosophy is shaped by life and life is shaped by philosophy. This is reflected in The Philosophical I, a collection of 16 autobiographical essays by prominent philosophers.

What makes New York City different from Moscow? Are small towns looking more and more alike? What criteria should we use to distinguish one place from another? Today, geographers and other social scientists are debating not only the answers to these sorts of questions but even whether or not to ask them at all. This ongoing controversy about how (or whether) to study place and its meaning in modern life forms the focus of J. Nicholas Entrikin's pioneering work. Those (...) who point to a decline in the study of place in geography, Entrikin explains, cite three main causes: the apparent homogenization of world culture; the belief that studying particular places is somehow "parochial;" and the tendency of the scientific method to generalize. Entrikin treats each of these in turn, addressing topics that include the Marxist view of a world economy, the moral implications of place (in such notions as community and provincialism), and the empiricist versus neo-Kantian traditions in philosophy. To geographers arguing the merits of hard, scientific data versus subjective experience, Entrikin offers a compromise. "To understand place," he suggests, "requires that we have access to both an objective and a subjective reality. From the decentered vantage point of the theoretical scientist, place becomes either location or a set of generic relations and loses much of its significance for human action. From the centered viewpoint of the subjective self, place has meaning only in relation to one's own goals and concerns. Place is best viewed from points in-between.". (shrink)

Vigorous debate over the moral propriety of cognitive enhancement exists, but the views of the public have been largely absent from the discussion. To address this gap in our knowledge, four experiments were carried out with contrastive vignettes in order to obtain quantitative data on public attitudes towards cognitive enhancement. The data collected suggest that the public is sensitive to and capable of understanding the four cardinal concerns identified by neuroethicists, and tend to cautiously accept cognitive enhancement even as they (...) recognize its potential perils. The public is biopolitically moderate, endorses both meritocratic principles and the intrinsic value of hard work, and appears to be sensitive to the salient moral issues raised in the debate. Taken together, these data suggest that public attitudes toward enhancement are sufficiently sophisticated to merit inclusion in policy deliberations, especially if we seek to align public sentiment and policy. (shrink)

Book reviewed in this article: In Search of History: Historiography in the Ancient World and the Origins of Biblical History. By John Van Seters. The Hidden God: The Hiding of the Face of God in the Old Testament. By Samuel E. Balentine. Theodicy in the Old Testament. Edited by James L. Crenshaw. Ce Dieu censé aimer la Souffrance. By François Varone. Evil and Evolution, A Theodicy. By Richard W. Kropf. ‘Poet and Peasant’ and ‘Through Peasant Eyes’: A Literary‐Cultural Approach to (...) the Parable in Luke. By Kenneth Bailey. The Biblical Foundations for Mission. By Donald Senior and Carroll Stuhlmueller. New Testament Foundations of Ministry. By Colin Kruse. Church, Ministry and Unity. By James E. Griffiss. Theology of Ministry. By Thomas Franklin O'Meara. Yesterday and Today: A Study of Continuities in Christology. By Colin E. Gunton. I believe in the Holy Spirit. By Yves Congar. Between Jesus and Paul. By Martin Hengel. From Nicaea to Chalcedon: A Guide to the Literature and its Background. By Frances Young. Alan of Lille: The Frontiers of Theology in the Later Twelfth Century. By G.R. Evans. Mystic and Pilgrim: The Book and the World of Margery Kempe. By Clarissa W. Atkinson. Church, Politics and Society: Scotland 1408–1929. Edited by N. Macdougall. Renaissance and Reform: The Italian Contribution. Collected Essays, Volume II. By Frances A. Yates. Seven‐Headed Luther: Essays in Commemoration of a Quincentury, 1483–1983. Edited by Peter Newman Brooks. Ökumenische Erschliessung Martin Luthers. Edited by Peter Manns and Harding Meyer. Luther's Ecumenical Significance, An Interconfessional Consultation. Edited by Peter Manns and Harding Meyer, in collaboration with Carter Lindberg and Harry McSorley. States of Mind: A Study of Anglo‐Irish Conflict 1780 to 1980. By Oliver MacDonagh. The Parish Clergy in Nineteenth‐Century Russia: Crisis, Reform, Counter Reform. By Gregory L. Freeze. Pusey Rediscovered. Edited by Perry Butler. Between Two Worlds: George Tyrrell's Relationship to the Thought of Matthew Arnold. By Nicholas Sagovsky. The Concept of Glaubenslehre. By Walter E. Wyman, Jr. The Existence and Nature of God. Edited by Alfred J. Freddoso. Faith and Reason. By Anthony Kenny. Logic and The Nature of God. By Stephen T. Davis. Personal Responsibility and Christian Morality. By Josef Fuchs. Morality and Conflict. By Stuart Hampshire. Realism and Imagination in Ethics. By Sabina Lovibond. Intentionality. By John R. Searle. Philosophical Papers, I: Practical Reason. By G.H. von Wright. Philosophical Papers, II: Philosophical Logic. By G.H. von Wright. A Model of Making: Literary Criticism and its Theology. By Ruth Etchells. The Return of the Goddess: Femininity, Aggression and the Modern Grail Quest. By Edward Whitmont. The Power of the Poor in History. By Gustavo Gutierrez, translated by Robert R. Barr. The God of the Xhosa. By Janet Hodgson. Our Hymn Tunes: Their Choice and Performance. By Donald Webster. The Almighty Wall: The Architecture of Henry Vaughan. By William Morgan. An Introduction to Plato's Laws. By R.E. Stalley. Plato's Late Ontology: A Riddle Resolved. By Kenneth M. Sayre. Plato's ‘Parmenides’: Translation and Analysis. By R.E. Allen. Politics in the Ancient World. By M.I. Finley. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:IntroductionWilliam J. ConnellOne of the more unusual works in the corpus of the Italian humanist Lorenzo Valla is the Oratio in principio sui studii, on the relation between Latin letters and the Christian faith. The speech was written and delivered in October 1455, toward the end of Valla’s life, as a lecture to inaugurate the academic year at the University of Rome where he had held the chair in (...) rhetoric since 1450. It was traditional at Rome to hold such an address each year not only to encourage the assembled students and faculty in their studies but also to thank the papacy for its support of the university, the Studium Urbis. For this reason Valla’s speech ends with customary words praising Pope Calixtus III for having increased the stipends of the lecturers in the university, even though, notwithstanding some remarkable kindnesses to Valla himself, Calixtus’s reputation was not that of a friend to scholarship. Valla’s Schoolyear Inaugural was not lengthy: it can only have lasted fifteen minutes. Nor is there indication that anyone was displeased with it. In fact, that is precisely what is oddest about the Inaugural, for throughout his career Valla had shown himself to be the sort of person who seized on such occasions to make polemical arguments. We read the speech—and it is possible that his audience also listened to it this way—expecting with each step that Valla will let fly a critical or unorthodox statement, but that never happens. 1Beginning with his earliest formal work, a comparison of Cicero and Quintilian written in 1428 and now lost, in which the humanist argued against Cicero on behalf of Quintilian, Valla seemed to delight in challenging established authorities. 2 His next important work, an attack on Bartolus of [End Page 1] Sassoferrato and the scholastic method of contemporary jurists, resulted in his forced departure from the University of Pavia. 3 A continuing combativeness is illustrated in subsequent writings, reaching an apogee in the work on the Donation. Even when Valla was developing another writer’s idea, he had a consistent way of pushing the argument to a daring extreme. This, as Riccardo Fubini argues below, is what Valla did in the De donatione, a work Fubini suggests relied more heavily on Nicholas of Cusa’s De concordantia catholica than hitherto realized, but written to promote an agenda far more radical than that of Cusanus. One of the surest indications of Valla’s brilliance as a polemicist is the fact that seventy years after his death humanists of the caliber of Agostino Steuco, the subject of Ronald K. Delph’s essay in this number, were still eager to take up cudgels against him.Valla paid a price for initiating so many disputes. In 1444, when he was called before the Inquisition in Naples after the attack on the Donation of Constantine, Valla was made to answer charges against not only that work, but also against the De vero bono for its Epicureanism, the De libero arbitrio for its determinism, the De professione religiosorum for its criticism of religious orders, and the Repastinatio totius dialectice et philosophie for various unorthodox statements, especially concerning the Trinity. This last work was the humanist’s most ambitious project, and he seems to have been aware of its explosive quality, since he alluded to a “peril to his life” should it be published. 4The 1455 Schoolyear Inaugural shows no trace of the risks that Valla took in his other writings, of his polemical temperament, or of his past disagreements with the Church. With style and vigor the speech argues that the Church deserves great thanks and praise for having ensured the survival [End Page 2] of Latin letters after the collapse of the Empire. This may seem a notable change of heart in the author who had written the oration On the Falsely Believed and Forged Donation of Constantin—a text which always seems to be lurking in the background of the Inaugural but which finds no explicit reference there. Given the proximity of Valla’s argument to the well-worn medieval theme of the translatio studii, his argument could hardly have been... (shrink)

From the Preface: "The majority of the papers contained in this volume was delivered in the fall of 1978 at The Catholic University of America as part of the Machette series of lectures on Aristotle. Although collections of essays on Aristotle are hardly lacking at present, this volume presents new studies which, it is hoped, give some idea of the variety of philosophical perspectives in which Aristotle has held and continues to hold great interest and of the scholarly analysis needed (...) in order to reach a better understanding of a difficult author." • CONTENTS: 1. Categories in Aristotle, Michael Frede • 2. Definitions in Aristotle's Posterior Analytics, Alfonso Gomez-Lobo • 3. Aristotle and Galileo: The Uses of ΥΠΟΘΕΣΙΣ (suppositio) in Scientific Reasoning, William A. Wallace • 4. Aristotle and the History of Greek Scepticism, A. A Long • 5. Aristotle's Metaphysics Viewed by the Ancient Greek Commentators, Gérard Verbeke • 6. ΕΙΔΗ in Aristotle's Earlier and Later Theories of Substance, John A. Driscol • 7. Averroes as Commentator on Aristotle's Theory of the Intellect, Arthur Hyman • 8. Aristotle's Method of Ethics, Terence Irwin • 9. Goodness and Human Aims in Aristotle's Ethics, Nicholas P. White • 10. Aristotle on the Essence of Happiness, Daniel T Devereux • 11. The ΚΑΛΟΝ in Aristotelian Ethics, Joseph Owens • 12. Telos and Teleology in Aristotelian Ethics, Henry B Veatch. (shrink)

This paper defends the idea that there might be vagueness or indeterminacy in the world itself---as opposed to merely in our representations of the world---against the charges of incoherence and unintelligibility. First we consider the idea that the world might contain vague *properties and relations*; we show that this idea is already implied by certain well-understood views concerning the semantics of vague predicates (most notably the fuzzy view). Next we consider the idea that the world might contain vague *objects*; we (...) argue that an object is indeterminate in a certain respect (colour, size, etc.) just in case it is a borderline case of a maximally specific colour (size, etc.) property. Finally we consider the idea that the *world as a whole* might be indeterminate; we argue that the world is indeterminate just in case it lacks a determinate division into determinate objects. (shrink)

One of the most striking differences between Frege's Begriffsschrift (logical system) and standard contemporary systems of logic is the inclusion in the former of the judgement stroke: a symbol which marks those propositions which are being asserted , that is, which are being used to express judgements . There has been considerable controversy regarding both the exact purpose of the judgement stroke, and whether a system of logic should include such a symbol. This paper explains the intended role of the (...) judgement stroke in a way that renders it readily comprehensible why Frege insisted that this symbol was an essential part of his logical system. The key point here is that Frege viewed logic as the study of inference relations amongst acts of judgement , rather than – as in the typical contemporary view – of consequence relations amongst certain objects (propositions or well-formed formulae). The paper also explains why Frege's use of the judgement stroke is not in conflict with his avowed anti-psychologism, and why Wittgenstein's criticism of the judgement stroke as 'logically quite meaningless' is unfounded. The key point here is that while the judgement stroke has no content , its use in logic and mathematics is subject to a very stringent norm of assertion. (shrink)

In VAGUENESS AND DEGREES OF TRUTH, Nicholas Smith develops a new theory of vagueness: fuzzy plurivaluationism. -/- A predicate is said to be VAGUE if there is no sharply defined boundary between the things to which it applies and the things to which it does not apply. For example, 'heavy' is vague in a way that 'weighs over 20 kilograms' is not. A great many predicates -- both in everyday talk, and in a wide array of theoretical vocabularies, from (...) law to psychology to engineering -- are vague. -/- Smith argues, based on a detailed account of the defining features of vagueness, that an accurate theory of vagueness must involve the idea that truth comes in degrees. The core idea of degrees of truth is that while some sentences are true and some are false, others possess intermediate truth values: they are truer than the false sentences, but not as true as the true ones. Degree-theoretic treatments of vagueness have been proposed in the past, but all have encountered significant objections. In light of these, Smith develops a new type of degree theory. Its innovations include a definition of logical consequence that allows the derivation of a classical consequence relation from the degree-theoretic semantics, a unified account of degrees of belief and their relationships with degrees of truth and subjective probabilities, and the incorporation of semantic indeterminacy -- the view that vague statements need not have unique meanings -- into the degree-theoretic framework. -/- As well as being essential reading for those working on vagueness, Smith's book provides an excellent entry-point for newcomers to the area -- both from elsewhere in philosophy, and from computer science, logic and engineering. It contains a thorough introduction to existing theories of vagueness and to the requisite logical background. (shrink)

This article investigates and resolves the question whether gauge symmetry can display analogs of the famous Galileo’s ship scenario. In doing so, it builds on and clarifies the work of Greaves and Wallace on this subject.

In his celebrated article on the contrary-to-fact conditional Roderick Chisholm makes the following astute observation.

Logic is essential to correct reasoning and also has important theoretical applications in philosophy, computer science, linguistics, and mathematics. This book provides an exceptionally clear introduction to classical logic, with a unique approach that emphasizes both the hows and whys of logic. Here Nicholas Smith thoroughly covers the formal tools and techniques of logic while also imparting a deeper understanding of their underlying rationales and broader philosophical significance. In addition, this is the only introduction to logic available today that (...) presents all the major forms of proof--trees, natural deduction in all its major variants, axiomatic proofs, and sequent calculus. The book also features numerous exercises, with solutions available on an accompanying website. -/- Logic is the ideal textbook for undergraduates and graduate students seeking a comprehensive and accessible introduction to the subject. -/- Provides an essential introduction to classical logic Emphasizes the how and why of logic Covers both formal and philosophical issues Presents all the major forms of proof--from trees to sequent calculus Features numerous exercises, with solutions available online The ideal textbook for undergraduates and graduate students . (shrink)

As a prolegomenon to understanding the sense in which dualities are theoretical equivalences, we investigate the intuitive `equivalence' of hyper-regular Lagrangian and Hamiltonian classical mechanics. We show that the symplectification of these theories provides a sense in which they are isomorphic, and mutually and canonically definable through an analog of `common definitional extension'.

This paper defends the idea that there might be vagueness or indeterminacy in the world itself---as opposed to merely in our representations of the world---against the charges of incoherence and unintelligibility. First we consider the idea that the world might contain vague *properties and relations*; we show that this idea is already implied by certain well-understood views concerning the semantics of vague predicates (most notably the fuzzy view). Next we consider the idea that the world might contain vague *objects*; we (...) argue that an object is indeterminate in a certain respect (colour, size, etc.) just in case it is a borderline case of a maximally specific colour (size, etc.) property. Finally we consider the idea that the *world as a whole* might be indeterminate; we argue that the world is indeterminate just in case it lacks a determinate division into determinate objects. (shrink)

This article uncovers a foundational relationship between the ‘gauge symmetry’ of a Newton-Cartan theory and the celebrated Trautman Recovery Theorem and explores its implications for recent philosophical work on Newton-Cartan gravitation.

In this paper I present a new argument against vague identity — one that is more fundamental than existing arguments — and I also try to explain why we find the idea of vague identity puzzling, in a way that will dispel the puzzlement. In brief, my argument is this: to make clear sense of something, one must at least model it set-theoretically; but due to the special place of identity in set-theoretic models, any vague relation that one does model (...) set-theoretically will not be identity, for real identity will already be there, built into the background of the model, and perfectly precise. (shrink)

Life works best when people value us for more than our looks. In these pages, Model and a philosopher friend reflect on the subtleties of life, revealing insights and finding ways to develop deeper, more meaningful ties with our own inner self and the other people in our lives.

In this paper, I discuss one form of the idea that spacetime and gravity might ‘emerge’ from quantum theory, i.e. via a holographic duality, and in particular via AdS/CFT duality. I begin by giving a survey of the general notion of duality, as well as its connection to emergence. I then review the AdS/CFT duality and proceed to discuss emergence in this context. We will see that it is difficult to find compelling arguments for the emergence of full quantum gravity (...) from gauge theory via AdS/CFT, i.e. for the boundary theory's being metaphysically more fundamental than the bulk theory. (shrink)

Orthodoxy has it that mereological composition can never be a vague matter, for if it were, then existence would sometimes be a vague matter too, and that's impossible. I accept that vague composition implies vague existence, but deny that either is impossible. In this paper I develop degree-theoretic versions of quantified modal logic and of mereology, and combine them in a framework that allows us to make clear sense of vague composition and vague existence, and the relationships between them.

Postmodernism and poststructuralism challenge fundamental positions in social theory. This book sets out some of the components of a postmodern social theory of health and healing, deriving from theorists including Derrida, Deleuze and Guattari, Foucault, Cixous and Kristeva. Nicholas J. Fox observes that the knowledge of the medical profession about the body, illness and health supplies the basis for medical dominance. The body of the patient is inscribed by discourses of professional `care,' an interaction which subjectifies the patient. Fox (...) explores the character of this power - and how it may be, and is, resisted. The book illustrates with detailed examples how the organization of health care and the caring relationship itself are sites for this contestation of power. Elements of feminist theory, and Derridean concepts of diffrance and intertextuality, supply the framework for the politics and ethics of the postmodern position on health. Deleuze and Guattari's radical challenge to psychoanalysis and familial repetitions within the healer/patient contact allows a re-reading of central ideas in medical sociology. While focusing upon the possibilities of postmodern social theory, the book demands a reappraisal of issues of structure, identity and knowledge in modernist medical sociology. Modernist sociology, Fox suggests, has been complicit in the creation of `the patient,' and of 'health' and 'illness.' Written with an emphasis on accessibility, this book explores the practical consequences of postmodern theory as well as familiarizing the reader with the concepts of postmodernism. (shrink)

A number of authors have noted that vagueness engenders degrees of belief, but that these degrees of belief do not behave like subjective probabilities. So should we countenance two different kinds of degree of belief: the kind arising from vagueness, and the familiar kind arising from uncertainty, which obey the laws of probability? I argue that we cannot coherently countenance two different kinds of degree of belief. Instead, I present a framework in which there is a single notion of degree (...) of belief, which in certain circumstances behaves like a subjective probability assignment and in other circumstances does not. The core idea is that one’s degree of belief in a proposition P is one’s expectation of P’s degree of truth. (shrink)

There is an extensive literature on time travel in both philosophy and physics. Part of the great interest of the topic stems from the fact that reasons have been given both for thinking that time travel is physically possible—and for thinking that it is logically impossible! This entry deals primarily with philosophical issues; issues related to the physics of time travel are covered in the separate entries on time travel and modern physics and time machines. We begin with the definitional (...) question: what is time travel? We then turn to the major objection to the possibility of backwards time travel: the Grandfather paradox. Next, issues concerning causation are discussed—and then, issues in the metaphysics of time and change. We end with a discussion of the question why, if backwards time travel will ever occur, we have not been visited by time travellers from the future. (shrink)

In this paper I present a new theory of propositions, according to which propositions are abstract mathematical objects: well-formed formulas together with models. I distinguish the theory from a number of existing views and explain some of its advantages  chief amongst which are the following. On this view, propositions are unified and intrinsically truth-bearing. They are mind- and language-independent and they are governed by logic. The theory of propositions is ontologically innocent. It makes room for an appropriate interface with (...) formal semantics and it does not enforce an overly fine or overly coarse level of granularity. (shrink)

This paper argues that the most famous objection to backward time travel can carry no weight. In its classic form, the objection is that backward time travel entails the occurrence of impossible things, such as auto-infanticide—and hence is itself impossible. David Lewis has rebutted the classic version of the objection: auto-infanticide is prevented by coincidences, such as time travellers slipping on banana peels as they attempt to murder their younger selves. I focus on Paul Horwich‘s more recent version of the (...) objection, according to which backward time travel entails not impossible things, but improbable ones—such as the string of slips on banana peels that would be required to stop a determined auto-infanticidal maniac from murdering her younger self—and hence is itself highly improbable. I argue that backward time travel does not entail unusual numbers of coincidences; and that, even if it did, that would not render its occurrence unlikely. (shrink)

Philosophers of physics and physicists have long been intrigued by the analogies and disanalogies between gravitational theories and gauge theories. Indeed, repeated attempts to collapse these disanalogies have made us acutely aware that there are fairly general obstacles to doing so. Nonetheless, there is a special case space-time dimensions) in which gravity is often claimed to be identical to a gauge theory. I subject this claim to philosophical scrutiny in this article. In particular, I analyse how the standard disanalogies can (...) be overcome in dimensions, and consider whether really licenses the interpretation of gravity as a gauge theory. Our conceptual analysis reveals more subtle disanalogies between gravity and gauge, and connects these to interpretive issues in classical and quantum gravity. 1 Introduction1.1 Motivation1.2 Prospectus2 Disanalogies3 Three-dimensional gravity and gauge3.1 gravity3.2 Chern–Simons3.2.1 Cartan geometry3.2.2 Overcoming obst-gauge via Cartan connections3.3 Disanalogies collapsed4 Two More Disanalogies4.1 What about the symmetries?4.2 The phase spaces of the two theories5 Summary and Conclusion. (shrink)

The notion of 'freedom' is essential to America's view of itself as a democratic and individual-based society. In this philosophical dialogue, characters assess the many facets, implications and apparent contradictions inherent in this deceptively complex idea. Seventy-nine short segments provide food for thought even in stolen moments of reading pleasure. The book sparkles with intellectually stimulating views. Drawing on the tradition of the Platonic dialogue, 'On Freedom' explores what freedom is and what it means through the discussions of two characters (...) (Director and Friend). Topics include Slavery, Responsibility, Anarchy, Wealth, Love, Courage, Authority, Inhibition, Happiness, Discipline, Vigilance. The characters arrive at no simple or absolute definition of freedom. But that doesn't mean they don't finish with a better idea of what freedom is than when they started. If anything, they come to appreciate the need for clarity about their subject. And they come to see that such clarity necessarily involves complexity. Readers with no philosophical training can enjoy this book, while readers with a philosophy background can enjoy the way it treats an old, familiar theme with a lighter touch. Families will value 'On Freedom' for enabling younger readers, too, to explore philosophic ideas of general interest and importance. (shrink)

A philosophical treatment of ideas, the book presents a philosophical dialogue much in the spirit of classical philosophical dialogues, notably those of Plato and Xenophon. As those authors do in a number of their works, Nick Pappas adopts a light and playful tone to treat a serious topic. This contrast helps bring out the truth, in an approachable style that requires no prior exposure to philosophy and heavy intellectual work.

This paper presents a new solution to the problems for orthodox decision theory posed by the Pasadena game and its relatives. I argue that a key question raised by consideration of these gambles is whether evaluative compositionality (as I term it) is a requirement of rationality: is the value that an ideally rational agent places on a gamble determined by the values that she places on its possible outcomes, together with their mode of composition into the gamble (i.e. the probabilities (...) assigned to them)? The paper first outlines a certain simple response to the Pasadena game and identifies two problems with this response, the second of which is that it leads to a wholesale violation of evaluative compositionality. I then argue that rationality does not require decision makers to factor in outcomes of arbitrarily low probability. A method for making decisions which flows from this basic idea is then developed, and it is shown that this decision method (Truncation) leads to a limited — as opposed to wholesale — violation of evaluative compositionality. The paper then argues that the truncation method yields solutions to the problems posed by the Pasadena game and its relatives that are both attractive in themselves and superior to those yielded by alternative proposals in the literature. (shrink)

This paper presents a new argument against A-theories of time. A-theorists hold that there is an objective now (present moment) and an objective flow of time, the latter constituted by the movement of the objective now through time. A-theorists therefore want to draw different pictures of reality—showing the objective now in different positions—depending upon the time at which the picture is drawn. In this paper it is argued that the times at which the different pictures are drawn may be taken (...) to be normal times or hypertimes. If they are normal times then the A-theory is inconsistent, or else collapses to the B-theory—and appealing to primitive tense operators will not help A-theorists avoid this conclusion. If the times are hypertimes then the A-theory is consistent, but deeply problematic none the less. (shrink)

In this note I raise a new problem for backwards time travel, and make some first suggestions as to how it might be solved. I call it the motivation problem. It is not a logical or a metaphysical problem, but a psychological one. It does not impact upon the possibility, or even the likelihood, of backwards time travel. Yet it is deeply puzzling, and we will have no idea what time travel would actually be like until we explore it. Thus, (...) where other problems for backward time travel assume that we know what time travel would be like, and argue that we cannot have it, this new problem gives us no reason to think that we cannot have time travel, but argues that we have much less idea than we usually suppose about what it would really be like to travel back in time. (shrink)

A common objection to theories of vagueness based on fuzzy logics centres on the idea that assigning a single numerical degree of truth -- a real number between 0 and 1 -- to each vague statement is excessively precise. A common objection to Bayesian epistemology centres on the idea that assigning a single numerical degree of belief -- a real number between 0 and 1 -- to each proposition is excessively precise. In this paper I explore possible parallels between these (...) objections. In particular I argue that the only good objection along these lines to fuzzy theories of vagueness does not translate into a good objection to Bayesian epistemology. An important part of my argument consists in drawing a distinction between two different notions of degree of belief, which I call dispositional degree of belief and epistemic degree of belief. (shrink)

This paper brings to light a new puzzle for Frege interpretation, and offers a solution to that puzzle. The puzzle concerns Frege’s judgement-stroke (‘|’), and consists in a tension between three of Frege’s claims. First, Frege vehemently maintains that psychological considerations should have no place in logic. Second, Frege regards the judgementstroke—and the associated dissociation of assertoric force from content, of the act of judgement from the subject matter about which judgement is made—as a crucial part of his logic. Third, (...) Frege holds that judging is an inner mental process, and that the distinction marked by the judgement-stroke, between entertaining a thought and judging that it is true, is a psychological distinction. I argue that what initially looks like confusion here on Frege’s part appears quite reasonable when we remind ourselves of the differences between Frege’s conception of logic and our own. (shrink)

This paper presents and defends a definition of vagueness, compares it favourably with alternative definitions, and draws out some consequences of accepting this definition for the project of offering a substantive theory of vagueness. The definition is roughly this: a predicate 'F' is vague just in case for any objects a and b, if a and b are very close in respects relevant to the possession of F, then 'Fa' and 'Fb' are very close in respect of truth. The definition (...) is extended to cover vagueness of many-place predicates, of properties and relations, and of objects. Some of the most important advantages of the definition are that it captures the intuitions which motivate the thought that vague predicates are tolerant, without leading to contradiction, and that it yields a clear understanding of the relationships between higher-order vagueness, sorites susceptibility, blurred boundaries, and borderline cases. The most notable consequence of the definition is that the correct theory of vagueness must countenance degrees of truth. (shrink)

If we think, as Ramsey did, that a degree of belief that P is a stronger or weaker tendency to act as if P, then it is clear that not only uncertainty, but also vagueness, gives rise to degrees of belief. If I like hot coffee and do not know whether the coffee is hot or cold, I will have some tendency to reach for a cup; if I like hot coffee and know that the coffee is borderline hot, I (...) will have some tendency to reach for a cup. Suppose that we take degrees of belief arising from uncertainty to obey the laws of probability and that we model vagueness using degrees of truth. We then encounter a problem: it does not look as though degrees of belief arising from vagueness should obey the laws of probability. One response would be to countenance two different sorts of degrees of belief: degrees of belief arising from uncertainty, which obey the laws of probability; and degrees of belief arising from vagueness, which obey a different set of laws. I argue, however, that if a degree of belief that P is a stronger or weaker tendency to act as if P, then this option is not open. Instead, I propose an account of the behaviour of degrees of belief that integrates subjective probabilities and degrees of truth. On this account, degrees of belief are expectations of degrees of truth. The account explains why degrees of belief behave in accordance with the laws of probability in cases involving only uncertainty, while also allowing degrees of belief to behave differently in cases involving only vagueness, and in mixed cases involving both uncertainty and vagueness. Justifications of the account are given both via Dutch books and in terms of epistemic accuracy. (shrink)

It is popularly believed that if A owes B a duty of care in negligence, A will not actually have a legal duty to be careful: A will merely be required to pay damages to B if she suffers loss as a result of A's being careless. We can call this the cynical view of duties of care and those who adopt it, cynics. However, it is possible to take a different view of duties of care in negligence, according to (...) which if A owes B a duty of care of some description, A will actually have a legal duty to be careful. We can call this the idealistic view of duties of care in negligence and those who adopt it, idealists. This article explains the importance of the debate between idealists and cynics over the nature of duties of care in negligence and goes on to argue that the cynical view of duties of care in negligence is, in fact, wrong and that the idealistic view of such duties should be preferred. (shrink)

In a warm and enjoyable dialogue the meaning of health, in its fullest sense, becomes a philosophical issue as much as a biological. For isn't the essence of health a general sense of well-being? Health can be seen as reflecting satisfaction with our quality of life; but how do we achieve that? Here, a character who is heading off for a job teaching health has an extended conversation with a trusted mentor, and they test various definitions, various visions, and some (...) of the infinite possibilities of the idea of health, in the process coming to a deeper and more invigorating understanding of life itself. They arrive at the notion of symbiosis - a living together to the advantage of each. And isn't a good conversation a sort of living together to the advantage of each? In such dialogue, we engage with our hearts and minds. When are we more alive than that? What is the peak of health if not this life, this engagement? The two friends want to know what health is. But they want more: They want to be healthy. They see three basic types of health - bodily, mental, and societal. These three types affect one another. How they affect one another matters in a critical way. But there is more. A friendly conversation allows special access to what is critical. Our guard is down in such a conversation. We are less likely to be defensive. We are more likely to keep our minds open and clear. We are likely to feel the confidence it takes to learn. (shrink)

Killing the Arab Spring tells the stories of the Arab Spring uprising in 15 Middle East states, from the point of view of a secular Middle Eastern political analyst familiar with the politics, the culture of the people and the history of the area. Dr. Hasan views the vast majority of the Arab rulers deriving their absolute authority from inheritance or military coups, or in the case of the Saudis from conquest, not at the pleasure of the governed. Arab leaders (...) do not believe that government is a trust on behalf of the people. They believe that if there is democracy and their societies are composed of equal and competing individuals, there will be a tendency towards anarchy. People involved in the Arab Spring uprisings demanded inclusive and equitable democracy, social justice and economic development. There were no civil society institutions strong enough to challenge the weapons of authoritarianism that included ideology, repression, payoffs and the solidarity of the crony capitalists. The author argues that Saddam Hussein’s 1980 war on Iran was the spark that started a chain of bloody wars and events which eventually led to the US invasion of Iraq and the Arab Spring uprisings. The revolts and the counter revolts took different forms in each country based on its history, the type of government and the economy. The author argues that the Arab Spring is a step of a long process toward democracy rather than an aberration between periods of authoritarian regimes. To understand the Arab Spring causes and its aftermath, the book provides the reader with a review of the Middle East common culture that includes the history of Islamic religion, Islamic-sects and Arab tribalism, and brief history of each country. There are few activities more controversial than writing history of a nation involved in a conflict. Even while witnessing history unfolding in a country, different historians provide different narratives, different causes and different conclusions. This becomes more obvious when the history of the conflicts is viewed through the prism of the politics of sectarianism ethnicity and tribalism. The author strives for an objective view, but he does not hide his strong support to liberal democracy and human rights. (shrink)

Violence and reason are related, if only because violence is done to reason every single day. All it takes is to fail to listen. Everything else, all the real violence, starts right there, including tough talk in lieu of rational argument and the violence of not allowing us to think things through. In a virtual conversation with other thoughtful people, we can evaluate and refine our own positions, gaining clarity and confidence.

Graham Priest (1994) has argued that the following paradoxes all have the same structure: Russell’s Paradox, Burali-Forti’s Paradox, Mirimanoff’s Paradox, König’s Paradox, Berry’s Paradox, Richard’s Paradox, the Liar and Liar Chain Paradoxes, the Knower and Knower Chain Paradoxes, and the Heterological Paradox. Their common structure is given by Russell’s Schema: there is a property φ and function δ such that..

This paper presents a new theory of vagueness, which is designed to retain the virtues of the fuzzy theory, while avoiding the problem of higher-order vagueness. The theory presented here accommodates the idea that for any statement S₁ to the effect that 'Bob is bald' is x true, for x in [0, 1], there should be a further statement S₂ which tells us how true S₁ is, and so on - that is, it accommodates higher-order vagueness without resorting to the (...) claim that the metalanguage in which the semantics of vagueness is presented is itself vague, and without requiring us to abandon the idea that the logic - as opposed to the semantics - of vague discourse is classical. I model the extension of a vague predicate P as a blurry set, this being a function which assigns a degree of membership or degree function to each object o, where a degree function in turn assigns an element of [0, 1] to each finite sequence of elements of [0, 1]. The idea is that the assignment to the sequence (0.3, 0.2), for example, represents the degree to which it is true to say that it is 0.2 true that o is P to degree 0.3. The philosophical merits of my theory are discussed in detail, and the theory is compared with other extensions and generalisations of fuzzy logic in the literature. (shrink)

A many-valued (aka multiple- or multi-valued) semantics, in the strict sense, is one which employs more than two truth values; in the loose sense it is one which countenances more than two truth statuses. So if, for example, we say that there are only two truth values—True and False—but allow that as well as possessing the value True and possessing the value False, propositions may also have a third truth status—possessing neither truth value—then we have a many-valued semantics in the (...) loose but not the strict sense. A many-valued logic is one which arises from a many-valued semantics and does not also arise from any two-valued semantics [Malinowski, 1993, 30]. By a ‘logic’ here we mean either a set of tautologies, or a consequence relation. We can best explain these ideas by considering the case of classical propositional logic. The language contains the usual basic symbols (propositional constants p, q, r, . . .; connectives ¬, ∧, ∨, →, ↔; and parentheses) and well-formed formulas are defined in the standard way. With the language thus specified—as a set of well-formed formulas—its semantics is then given in three parts. (i) A model of a logical language consists in a free assignment of semantic values to basic items of the non-logical vocabulary. Here the basic items of the non-logical vocabulary are the propositional constants. The appropriate kind of semantic value for a proposition is a truth value, and so a model of the language consists in a free assignment of truth values to basic propositions. Two truth values are countenanced: 1 (representing truth) and 0 (representing falsity). (ii) Rules are presented which determine a truth value for every proposition of the language, given a model. The most common way of presenting these rules is via truth tables (Figure 1). Another way of stating such rules—which will be useful below—is first to introduce functions on the truth values themselves: a unary function ¬ and four binary functions ∧, ∨, → and ↔ (Figure 2).. (shrink)

The received model of degrees of belief represents them as probabilities. Over the last half century, many philosophers have been convinced that this model fails because it cannot make room for the idea that an agent’s degrees of belief should respect the available evidence. In its place they have advocated a model that represents degrees of belief using imprecise probabilities (sets of probability functions). This paper presents a model of degrees of belief based on Dempster–Shafer belief functions and then presents (...) arguments for belief functions over imprecise probabilities as a model of evidence-respecting degrees of belief. The arguments cover three kinds of issue: theoretical virtues (simplicity, interpretability and flexibility); motivations; and problem cases (dilation and belief inertia). (shrink)