Admirers of Whitehead who know him best have suggested that Wordsworth had possibly a greater influence upon him than anyone except Plato. Nowhere apparently has Whitehead admitted such an influence, as he has that of Plato and Locke and that of William James, Bergson, and Alexander among traditional and contemporary philosophers But he had a predilection for poetry, and attributes to the great poets philosophical importance. They capture uniquely, he says, “a fragrance of experience”; and “… express deep intuitions (...) of mankind penetrating into what is universal in concrete fact.” As observers of nature both Wordsworth and Whitehead ascribed to animate and inanimate life a degree of feeling or satisfaction in the course of being and becoming. Like the poet, Whitehead must have found “joy in widest commonalty spread.” The multiplication table, he noted at one time, “… is no good to the realist. It shuts him up with Plato's ideas out of space and out of time” when “… like Wordsworth and the rest of us he wants to hear the throstle sing.”. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Introducing AestheticsJames McRaeIntroducing Aesthetics. By David E. W. Fenner. Westport, CT: Praeger, 2003. Pp. 170.David E. W. Fenner's Introducing Aesthetics offers a comprehensive introduction to the major traditions of Western aesthetics. Fenner confines his study to Western aesthetics and does not address the aesthetic traditions of Asian philosophy. This is not, by any means, a limitation, as this restriction of scope makes Fenner's work more concise and readily (...) accessible to those unfamiliar with aesthetics.Fenner divides his book into four parts: "Experiences," "Objects and Events," "Meaning," and "Judgment." Part 1 discusses the meaning and scope of the term "aesthetic" and analyzes the significance of "aesthetic experiences" and "aesthetic properties." Here, Fenner also explains the notion of aesthetic attitude as it is understood from the traditional perspective of disinterest (which includes thinkers such as Kant, Schopenhauer, and Stolnitz) and from modern points of view (such as Bullough's psychical distance and Aldrich's impressionistic vision).Part 2 contains three chapters, which discuss the nature of aesthetic objects, the definition of "art," and the concept of creation and re-creation. The chapter that explores the definition of "art" provides a succinct explanation of the major traditions of aesthetics and art criticism: the Greek notions of imitation and representation (with sections on Plato and Aristotle), Romanticism (including Schopenhauer and Nietzsche), Expressionism (focusing on Tolstoy, Croce, and Collingwood), Formalism (particularly Moore and Bell), Anti-Essentialism (which includes Wittgenstein and Weitz), and a final section concerning perspectives on the art world (from theorists such as Danto and Dickie). The final chapter, on creation and re-creation, discusses the nature of creativity and the essential differences between fakes, forgeries, and reproductions.Part 3 is devoted to an exploration of the meaning of art. The first chapter of this section concerns the problem of art interpretation and discusses such issues as the educated viewer, the intentional fallacy, and the possibility of a pluralism of artistic interpretations. The second chapter deals with censorship and examines various approaches to balancing the freedom of artistic expression with the moral concerns of society.In Part 4, Fenner examines the theme of artistic judgment. The first chapter of this section analyzes three traditional approaches to defining the term "beauty": formalism, subjectivism, and naturalism. This chapter includes summaries of the aesthetic theories of thinkers such as Plato, Aristotle, Hume, Kant, and Dewey, to name but a few. The final chapter is devoted to a discussion of art criticism. Here, Fenner gives a detailed description of the four aspects of critical review (description, information, interpretation, evaluation) and explores the various challenges raised against the very possibility of criticism (such as emotivism). [End Page 515]Because of the clarity of its presentation and the quality of its scholarship, this book would serve well as a text for either introductory or upper-division undergraduate philosophy classes. One of the more useful features of Fenner's book is an extensive appendix that presents the history of Western aesthetics in outline form. Here, the ideas of the most important movements and philosophers of Western aesthetics are neatly summarized and presented in a chronology that clearly illustrates the historical shift in trends of thought and patterns of influence. This appendix would be an indispensable study guide for graduate students who are preparing for comprehensive examinations in the history of aesthetics. [End Page 516]Copyright © 2006 University of Hawai'i Press... (shrink)

In this paper, I develop a serious new dilemma involving necessary truths for safety-based theories of knowledge, a dilemma that I argue safety theorists cannot resolve or avoid by relativizing safety to either the subject’s basis or method of belief formation in close worlds or to a set of related or sufficiently similar propositions. I develop this dilemma primarily in conversation with Duncan Pritchard’s well-known, oft-modeled safety-based theories of knowledge. I show that Pritchard’s well-regarded anti-luck virtue theory of knowledge and (...) his recently proposed (allegedly superior) anti-risk virtue theory of knowledge clearly succumb to the dilemma, and so they are inadequate as they stand. If Pritchard’s safety-based theories of knowledge are shown to be inadequate by the dilemma that is developed in this paper, then a number of other safety-based theories of knowledge (e.g., Beddor and Pavese’s, Luper’s, Dutant’s, early Pritchard’s, and others) look to be in jeopardy in this connection as well. (shrink)

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)

A new process philosophy of signs, where process becomes primary, and fixed relation secondary'Behind Red Doors - Signs, Process and the Political' - a post by James Williams on the Edinburgh University Press blogWhat is a sign? We usually think that it is a fixed relation: a red light signifies 'Stop'. In his bold new book, James Williams now argues that signs are varying processes: seeing the red light triggers a creative response to the question, Should I stop?Williams (...) develops this new process philosophy of signs through a formal model, in contrast to earlier structuralist definitions. He draws on the philosophies of Deleuze and Whitehead, criticises earlier work on the sign in biology by Jakob von Uexküll, and connects to contemporary work on process in the philosophy of biology by John Dupré.The process model has wide applications in the arts, humanities and social sciences, and informs their critical debates with science. In defining the sign as essentially political, this radical definition of the sign opens up new possibilities for social and political critique.". (shrink)

This paper discusses some procedures developed in recent work in machine learning for inferring causal direction from observational data. The role of independence and invariance assumptions is emphasized. Several familiar examples including Hempel’s flagpole problem are explored in the light of these ideas. The framework is then applied to problems having to do with explanatory direction in non-causal explanation.

Two books bound together, from the religious period of one of the most renowned and representative thinkers. Written for laymen, thus easy to understand, it is penetrating and brilliant as well. Illuminations of age-old religious questions from a pragmatic perspective, written in a luminous style.

A number of writers, myself included, have recently argued that an “interventionist” treatment of causation of the sort defended in Woodward, 2003 can be used to cast light on so-called “causal exclusion” arguments. This interventionist treatment of causal exclusion has in turn been criticized by other philosophers. This paper responds to these criticisms. It describes an interventionist framework for thinking about causal relationships when supervenience relations are present. I contend that this framework helps us to see that standard arguments for (...) causal exclusion involve mistaken assumptions about what it is appropriate to control for or hold fixed in assessing causal claims. The framework also provides a natural way of capturing the idea that properties that supervene on but that are not identical with realizing properties can be causally efficacious. (shrink)

We are bombarded with epistemic norms. Respect your evidence. Don’t believe in contradictions. Don’t arbitrarily change beliefs. But how do such norms get their normative force? Why should we respect our evidence, for example? In this paper I offer a familiar type of answer, epistemic instrumentalism. Epistemic instrumentalism holds that epistemic norms get their normative force by being useful. You should respect your evidence because it will help you achieve some valuable ends. This answer, while familiar, is not very popular. (...) There is a widely accepted objection to epistemic instrumentalism, the too few reasons objection. The objection looms so large that standard developments of instrumentalism have become bloated with philosophical machinery to respond to it. This does a disservice to epistemic instrumentalism. Rather than focusing completely on the objection, I focus on describing a simple model for how conforming to the epistemic norms is broadly useful. Once I describe the simple model, the too few reasons objection becomes much easier to answer. This strategy results in a well-motivated philosophical theory based on uncontroversial facts that has many advantages over rival theories. (shrink)

Philosophy & Public Affairs, Volume 50, Issue 2, Page 169-201, Spring 2022.

The problems and the keys to their solutions -- Ontology of artworks -- Copyright and its limits -- Token appropriation -- Pattern appropriation -- Appropriation of artistic elements.

I argue that the hole argument is based on a misleading use of the mathematical formalism of general relativity. If one is attentive to mathematical practice, I will argue, the hole argument is blocked. _1._ Introduction _2._ A Warmup Exercise _3._ The Hole Argument _4._ An Argument from Classical Spacetime Theory _5._ The Hole Argument Revisited.

This paper responds to recent criticisms of the idea that true causal claims, satisfying a minimal “interventionist” criterion for causation, can differ in the extent to which they satisfy other conditions—called stability and proportionality—that are relevant to their use in explanatory theorizing. It reformulates the notion of proportionality so as to avoid problems with previous formulations. It also introduces the notion of conditional independence or irrelevance, which I claim is central to understanding the respects and the extent to which upper (...) level explanations can be “autonomous”. (shrink)

This chapter explores the possibility of weakening the criteria for causal explanation in Making Things Happen to yield various forms of non-causal explanation. These include the following: retaining the idea that explanations must answer what if things had been different questions but dropping the requirement the answers to such questions must take the form of claims about what would happen under interventions. Retaining the w- question requirement but allowing generalizations that hold for mathematical or conceptual reasons to figure in explanations. (...) Dropping the w-question requirement to accommodate the role of information about irrelevance in explanation. (shrink)

This paper defends the notion of downward causation. I will seek to elucidate this notion, explain why it is a useful way of thinking, and respond to criticisms attacking its intelligibility. My account of downward causation will be in many respects similar to the account recently advanced by Ellis. The overall framework I will adopt is the interventionist treatment of causation I have defended elsewhere: X causes Y when Y changes under a suitable manipulation of X. When X is at (...) a higher “level” than Y this allows for the possibility of downward causation from X to Y. True claims of downward causation must meet certain additional conditions, some of which have already been discussed by Ellis. These include the condition that X must have a homogenous effect on Y in the sense that the effect of X on Y must be the same regardless of how X is “realized” at lower levels. In addition, the most plausible examples of downward causation will involve causes X, that in a sense that I will try to specify, are capable of being manipulated by macro-level interventions that have a coordinated or organized impact on them, as when one manipulates the temperature of a gas by placing it in a heat bath.Three common criticisms of the notion of downward causation that I will consider are: the claim that this involves a whole acting downward on its parts which is an objectionable idea because wholes and parts are not sufficiently distinct to stand in causal relationships, that downward causation commits us to the existence of causal cycles in which X causes Y which in turn causes X and that the asymmetric nature of the causal relation rules out such cycles, and causal exclusion type worries, according to which all of the causal action occurs among “low level” variables, so that upper level variables are deprived of causal efficacy. In response I will argue that plausible examples of downward causation in the scientific literature do not involve whole to part causation, there is nothing wrong with causal cycles, which are common in, for example, biological contexts, exclusion type worries do not arise within the interventionist framework that I favor. (shrink)

James H. Donelan describes how two poets, a philosopher, and a composer - Hölderlin, Wordsworth, Hegel, and Beethoven - developed an idea of self-consciousness based on music at the turn of the nineteenth century. This idea became an enduring cultural belief: the understanding of music as an ideal representation of the autonomous creative mind. Against a background of political and cultural upheaval, these four major figures - all born in 1770 - developed this idea in both metaphorical and actual (...) musical structures, thereby establishing both the theory and the practice of asserting self-identity in music. Beethoven still carries the image of the heroic composer today; this book describes how it originated in both his music and in how others responded to him. Bringing together the fields of philosophy, musicology, and literary criticism, Donelan shows how this development emerged from the complex changes in European cultural life taking place between 1795 and 1831. (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)

This volume contains all of the presidential addresses given before the American Society for Value Inquiry since its first meeting in 1970. Contributions are by Richard Brandt*, Virgil Aldrich*, John W. Davis*, the late Robert S. Hartman*, James B. Wilbur*, the late William H. Werkmeister, Robert E. Carter, the late William T. Blackstone, Gene James, Eva Hauel Cadwallader, Richard T. Hull, Norman Bowie*, Stephen White*, Burton Leiser+, Abraham Edel, Sidney Axinn, Robert Ginsberg, Patricia Werhane, Lisa M. Newton, (...) Thomas Magnell, Sander Lee, John M. Abbarno, Ruth Miller Lucier, and Tom Regan*. Autobiographical sketches* by all of the living contributors and one recently deceased, biographical statements of the remainder, together with photographic portraits of all the contributors*, make this volume a unique record of value inquiry during the past quarter century. __. (shrink)

In their recent book, Oreskes and Conway describe the ‘tobacco strategy’, which was used by the tobacco industry to influence policymakers regarding the health risks of tobacco products. The strategy involved two parts, consisting of promoting and sharing independent research supporting the industry’s preferred position and funding additional research, but selectively publishing the results. We introduce a model of the tobacco strategy, and use it to argue that both prongs of the strategy can be extremely effective—even when policymakers rationally update (...) on all evidence available to them. As we elaborate, this model helps illustrate the conditions under which the tobacco strategy is particularly successful. In addition, we show how journalists engaged in ‘fair’ reporting can inadvertently mimic the effects of industry on public belief. 1Introduction2Epistemic Network Models3Selective Sharing4Biased Production5Journalists as Unwitting Propagandists6ConclusionAppendix. (shrink)

Almost all of us would agree that the experience of art is deeply rewarding. Why this is the case remains a puzzle; nor does it explain why many of us find works of art much more important than other sources of pleasure. Art and Knowledge argues that the experience of art is so rewarding because it can be an important source of knowledge about ourselves and our relation to each other and to the world. The view that art is a (...) source of knowledge can be traced as far back as Aristotle and Horace. Artists as various as Tasso, Sidney, Henry James and Mendelssohn have believed that art contributes to knowledge. As attractive as this view may be, it has never been satisfactorily defended, either by artists or philosophers. Art and Knowledge reflects on the essence of art and argues that it ought to provide insight as well as pleasure. It argues that all the arts, including music, are importantly representational. This kind of representation is fundamentally different from that found in the sciences, but it can provide insights as important and profound as available from the sciences. Once we recognise that works of art can contribute to knowledge we can avoid thorough relativism about aesthetic value and we can be in a position to evaluate the avant-garde art of the past 100 years. Art and Knowledge is an exceptionally clear and interesting, as well as controversial, exploration of what art is and why it is valuable. It will be of interest to all philosophers of art, artists and art critics. (shrink)

Journal of Religious Ethics, Volume 49, Issue 4, Page 768-792, December 2021.

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)

Fair allocation of scarce healthcare resources has been much studied within philosophy and bioethics, but analysis has focused on a narrow range of cases. The Covid-19 pandemic provided significant new challenges, making powerfully visible the extent to which health systems can be fragile, and how scarcities within crucial elements of interlinked care pathways can lead to cascading failures. Health system resilience, while previously a key topic in global health, can now be seen to be a vital concern in high-income countries (...) too. Unfortunately, mainstream philosophical approaches to the ethics of rationing and prioritisation provide little guidance for these new problems of scarcity. Indeed, the cascading failures were arguably exacerbated by earlier attempts to make health systems leaner and more efficient. This paper argues that health systems should move from simple and atomistic approaches to measuring effectiveness to approaches that are holistic both in focusing on performance at the level of the health system as a whole, and also in incorporating a wider range of ethical concerns in thinking about what makes a health system good. (shrink)

Now, for the first time, a philosopher undertakes a systematic investigation of the moral and aesthetic issues to which cultural appropriation gives rise. Cultural appropriation is a pervasive feature of the contemporary world Young offers the first systematic philosophical investigation of the moral and aesthetic issues to which cultural appropriation gives rise Tackles head on the thorny issues arising from the clash and integration of cultures and their artifacts Questions considered include: “Can cultural appropriation result in the production of aesthetically (...) successful works of art?” and “Is cultural appropriation in the arts morally objectionable?” Part of the highly regarded New Directions in Aesthetics series. (shrink)

In recent years, philosophers of science have explored categorical equivalence as a promising criterion for when two theories are equivalent. On the one hand, philosophers have presented several examples of theories whose relationships seem to be clarified using these categorical methods. On the other hand, philosophers and logicians have studied the relationships, particularly in the first order case, between categorical equivalence and other notions of equivalence of theories, including definitional equivalence and generalized definitional equivalence. In this article, I will express (...) some skepticism about categorical equivalence as a criterion of physical equivalence, both on technical grounds and conceptual ones. I will argue that “category structure” likely does not capture the structure of a theory, and discuss some recent work in light of this claim. (shrink)

A theorem due to Bob Geroch and Pong Soo Jang ["Motion of a Body in General Relativity." Journal of Mathematical Physics 16, ] provides a sense in which the geodesic principle has the status of a theorem in General Relativity. I have recently shown that a similar theorem holds in the context of geometrized Newtonian gravitation [Weatherall, J. O. "The Motion of a Body in Newtonian Theories." Journal of Mathematical Physics 52, ]. Here I compare the interpretations of these two (...) theorems. I argue that despite some apparent differences between the theorems, the status of the geodesic principle in geometrized Newtonian gravitation is, mutatis mutandis, strikingly similar to the relativistic case. (shrink)

Caton d’Utique est parfois présenté comme un exemple d’agent moral ayant toujours agi avec honnêteté. Il refuse tout compromis moral. J’analyse ici comment les auteurs antiques présentent cette honnêteté comme une forme d’inaptitude, plus précisément une inaptitude à envisager toute action injuste, et comment cela est présenté comme une forme d’obstination et d’échec empêchant d’interagir avec les gens tels qu’ils sont réellement. Je compare ces anciennes représentations et ces jugements sur Caton avec le traitement des « saints moraux » par (...) Susan Wolf. (shrink)

TheJournal of Religious Ethicshas published only two full‐length articles focusing on American Indian religious ethics in the last decade. This may signal that the field is uneasy about integrating American Indian religious ethics into its broader discourse. To fill this research lacuna and take a step toward normalizing religious‐ethical engagement with American Indian ethics, this article argues that the field needs an intentionally anticolonial, self‐aware approach to understanding American Indian religious ethics—one that decenters methods and approaches that may facilitate the (...) analysis of Christian texts, groups, and phenomena, yet limit insights into the religious‐moral beliefs and practices of Native Americans. The article first shows examples of how religious‐ethical methods, definitions, and epistemological starting points can obfuscate rich and accurate understandings of Native American religious‐ethical systems and phenomena. Next, it turns to historical and anthropological studies and Native American philosophy and ethics to outline an interdisciplinary framework for integrating American Indian traditions into the discourses of religious ethics. (shrink)

Why do people who disagree about one subject tend to disagree about other subjects as well? In this paper, we introduce a model to explore this phenomenon of ‘epistemic factionization’. Agents attempt to discover the truth about multiple propositions by testing the world and sharing evidence gathered. But agents tend to mistrust evidence shared by those who do not hold similar beliefs. This mistrust leads to the endogenous emergence of factions of agents with multiple, highly correlated, polarized beliefs.

In nine lively essays, bioethicist J. David Velleman challenges the prevailing consensus about assisted suicide and reproductive technology, articulating an original approach to the ethics of creating and ending human lives. He argues that assistance in dying is appropriate only at the point where talk of suicide is not, and he raises moral objections to anonymous donor conception. In their place, Velleman champions a morality of valuing personhood over happiness in making end-of-life decisions, and respecting the personhood of future children (...) in making decisions about procreation. These controversial views are defended with philosophical rigor while remaining accessible to the general reader. Written over Velleman's 30 years of undergraduate teaching in bioethics, the essays have never before been collected and made available to a non-academic audience. They will open new lines of debate on issues of intense public interest."--Publisher's website. (shrink)

I review the philosophical literature on the question of when two physical theories are equivalent. This includes a discussion of empirical equivalence, which is often taken to be necessary, and sometimes taken to be sufficient, for theoretical equivalence; and "interpretational" equivalence, which is the idea that two theories are equivalent just in case they have the same interpretation. It also includes a discussion of several formal notions of equivalence that have been considered in the recent philosophical literature, including definitional equivalence (...) and categorical equivalence. The article concludes with a brief discussion of the relationship between equivalence and duality. (shrink)