What is the function of cognition? On one influential account, cognition evolved to co-ordinate behaviour with environmental change or complexity. Liberal interpretations of this view ascribe cognition to an extraordinarily broad set of biological systems—even bacteria, which modulate their activity in response to salient external cues, would seem to qualify as cognitive agents. However, equating cognition with adaptive flexibility per se glosses over important distinctions in the way biological organisms deal with environmental complexity. Drawing on contemporary advances in theoretical biology (...) and computational neuroscience, we cash these distinctions out in terms of different kinds of generative models, and the representational and uncertainty-resolving capacities they afford. This analysis leads us to propose a formal criterion for delineating cognition from other, more pervasive forms of adaptive plasticity. On this view, biological cognition is rooted in a particular kind of functional organisation; namely, that which enables the agent to detach from the present and engage in counterfactual inference. (shrink)

Between inventing the concept of a universal computer in 1936 and breaking the German Enigma code during World War II, Alan Turing, the British founder of computer science and artificial intelligence, came to Princeton University to study mathematical logic. Some of the greatest logicians in the world--including Alonzo Church, Kurt Gödel, John von Neumann, and Stephen Kleene--were at Princeton in the 1930s, and they were working on ideas that would lay the groundwork for what would become known as computer science. (...) Though less well known than his other work, Turing's 1938 Princeton PhD thesis, "Systems of Logic Based on Ordinals," which includes his notion of an oracle machine, has had a lasting influence on computer science and mathematics. This book presents a facsimile of the original typescript of the thesis along with essays by Andrew Appel and Solomon Feferman that explain its still-unfolding significance. A work of philosophy as well as mathematics, Turing's thesis envisions a practical goal--a logical system to formalize mathematical proofs so they can be checked mechanically. If every step of a theorem could be verified mechanically, the burden on intuition would be limited to the axioms. Turing's point, as Appel writes, is that "mathematical reasoning can be done, and should be done, in mechanizable formal logic." Turing's vision of "constructive systems of logic for practical use" has become reality: in the twenty-first century, automated "formal methods" are now routine. Presented here in its original form, this fascinating thesis is one of the key documents in the history of mathematics and computer science. (shrink)

Detailed studies of people who have experienced the Capgras delusion (the delusion that certain other people, usually close relatives, have been replaced by impostors) have led to advances in constructing an account which can deal with the basic symptomatology, testing alternative possibilities, generating and testing non‐trivial predictions, and broadening the scope of the basic account to encompass other delusions. This paper outlines these developments. It uses them to explore implications for understanding the formation and maintenance of beliefs, and to discuss (...) basic principles of what has come to be known as cognitive neuropsychiatry. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy, Psychiatry, & Psychology 9.1 (2002) 55-59 [Access article in PDF] One Stage Is Not Enough Andrew W. Young and Karel W. de Pauw Keywords: delusions, Cotard delusion, Capgras delusion, cognitive neuropsychiatry. WE WELCOME THE OPPORTUNITY to offer our reflections on Philip Gerrans' interesting paper. Our opinion is that on fundamental issues we agree quite a bit—but there are clear differences when it comes to details.The most basic (...) issue concerns the nature of the enterprise. Like Gerrans, we think that it is possible to create testable accounts of the formation and maintenance of what would otherwise seem bizarre and inexplicable delusions, and that these accounts should be grounded in theoretical models of factors that underpin our everyday perception and reasoning. This general approach certainly forms part of what has been called cognitive neuropsychiatry. However, we disagree with Gerrans in that we see cognitive neuropsychiatry as an attempt to draw on the underlying logic of cognitive neuropsychology, rather than (as Gerrans implies) its current methods. The underlying logic of cognitive neuropsychological approaches has been to try to understand the effects of brain injury in terms of disruption of different components of theoretical models of normal abilities. In this approach, a model of normal performance is tested by its ability to account for the effects of brain injury. Where the model of normal performance also provides a convincing account of brain injury it is retained, and when it fails to account for effects of brain injury, it is revised or abandoned. In cognitive neuropsychiatry, the key theoretical move has been to argue that an adequate model of normal performance should be able to account for any disordered pattern (Ellis and Young 1990). The same logic of seeking to explain disordered performance by reference to models of normal function is then attempted, but for disorders that would usually fall within the province of psychiatry.In our opinion, however, cognitive neuropsychiatry will not simply involve importing the methods of cognitive neuropsychology into the new domain; they will need to be developed and adapted to fit the new agenda (Young 2000).In cognitive neuropsychology, progress has often come from the careful investigation of people with stable, selective deficits of fundamental cognitive functions involved in sensory analysis, memory, and verbal or motor output. In contrast, delusional beliefs can be relatively unstable; often they are only held for a few weeks or even days. When the delusions change, patients may modify or abandon them as suddenly as they seemed to form them, or they may give them up much more slowly and reluctantly. At the very least, this creates difficulties in the timing of investigations and in interpreting the relation of deficits and symptoms, which may be recorded on separate dates. These methodological problems [End Page 55] are exacerbated by the fact that deficits linked to complex abnormal experiences such as delusions may be multifaceted and diffuse, even when the delusions themselves have a specific content or theme. Such complications do not invalidate cognitive neuropsychiatry, but they do mean it will need to develop its own methods for dealing with them and making appropriate inferences.One of the key complexities that has surfaced already involves the idea that delusional beliefs might reflect the interaction of two or more contributory factors. Gerrans discusses a particular variant of this idea, which had been suggested by Young and Leafhead (1996) as an approach to understanding the Cotard delusion: The Cotard delusion represents a depressed person's attempt to account for abnormal perceptual experiences. It follows that the delusion is based on an unfortunate interaction between different contributory factors. One set of factors creates the abnormal perceptual experiences, which are characterised by lack of emotional responses and feelings of emptiness, depersonalisation and derealisation. The other factors result in a misinterpretation of these perceptual changes, in which the patients' depressed moods lead them correctly to attribute the changes to themselves, but to exaggerate their consequences. (Young and Leafhead, 1996, 166) Gerrans describes this as a two-stage account, but argues that a one-stage account based only on abnormal perceptual... (shrink)

This article aims to supplement our understanding of later developments within European universities, that is, Scholastic thought, by attending to how certain pre-Scholastics, namely, Peter Abelard and other twelfth-century philosophers, thought about artifacts and social constructions more generally. It focuses on the treatment of artifacts that can be cobbled together out of Abelard’s Dialectica. The article argues that Abelard attempts to sharply distinguish the world of things from the world of human-made objects. This is most apparent in his treatment of (...) creation and human acts of making. Yet there are places in his thought where we see some hesitancy. Many of Abelard’s peers seem to have drawn on the reasons why Abelard hesitates, and they blur the line between human-made objects such as houses and substances such as rocks and humans. Others seem to go further than Abelard—perhaps inspired by some of the thoughts that Abelard also entertains about social constructions such as days and speeches—and assert that even houses are merely convenient fictions. (shrink)

In Act 1 scene iv of Macbeth, Duncan reflects that: 'There's no art to find the mind's construction in the face'. In contrast, the claim that Andy Young sets out in this book is that we are now developing a science of face perception which can indeed shed light on certain aspects of mentallife. Face and Mind consists of a series of seminal research and review papers on face perception published by the author and his colleagues over the last 12 (...) years. A comprehensive introductory chapter, written especially for this volume, serves to draw together the various themes explored in thedifferent contributions. The book examines the question of how faces are special, in terms of their social, biological, and theoretical roles. In particular, Face and Mind seeks to determine what our understanding of the face can tell us about the human brain. It discusses the evidence for anevolved neural substrate for face perception, and the question of whether we are innately predisposed to recognise faces, to find them attractive, and to decode the many social signals they give us. The ability of the human brain to process and remember the many different faces that we see andsubsequently recall is analysed. Young includes detailed studies of the types of impairment to face perception which can follow brain injury or psychiatric illness, and uses them to address these questions, as well as other issues of high intrinsic and interdisciplinary interest. These include theextent to which our mental lives result from the operation of discrete components devoted to different purposes, the differences between conscious and non-conscious processes, and how we use evidence to support our beliefs about the world. Because of the huge variety of social signals read from theface, it can offer unique theoretical and philosophical insights into these questions. This fascinating book will be of interest not only to psychologists and neuropsychologists working in the field of visual perception, but to cognitive scientists generally. It provides an excellent summary ofthe most important theorietical and empirical work done on face perception in recent years, and as such will be of interest to advanced undergraduate and post-graduate students in psychology, philosophy, and cognitive science. (shrink)

Pietraszewski exemplifies the need for computational theory using group conflict; I complement this with an example of group cooperation. He criticizes past theories for having black boxes; I suggest his theory also has a black box – the concept of costs. He divides what mentally constitutes a group from mere ancillary attributes; I hazard that some of these attributes are essential.

This article gives an overview of what we can learn about face perception from studying its disorders. The term “disorders” is broadly interpreted to include acquired brain injury and disease, neurodevelopmental differences, and neuropsychiatric problems. The article examines the reasons for various opinions about what can be learnt from disorders, ranging from the entire spectrum from “nothing that isn't misleading” to “everything worth knowing.” Cognitive neuropsychology typically operates in a unique way, in which the emphasis is on detailed analysis of (...) individual patients with theoretically interesting impairments. The article then highlights a number of the assumptions that get made, explains why things are often complicated, and emphasizes the value of a pragmatic “converging operations” approach in which evidence from disorders of face perception is brought together with other sources of data and theory. (shrink)

Some cases of prosopagnosia involve a highly circumscribed loss of A-consciousness. When seen in this way they offer further support for the arguments made in Block's target article.

This paper defends a key aspect of the Peircean conception of truth—the idea that truth is in some sense epistemically-constrained. It does so by exploring parallels between Peirce’s epistemology of inquiry and that of Wittgenstein in On Certainty. The central argument defends a Peircean claim about truth by appeal to a view shared by Peirce and Wittgenstein about the structure of reasons. This view relies on the idea that certain claims have a special epistemic status, or function as what are (...) popularly called ‘hinge propositions’. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Beyond Realism & Anti-Realism: John Dewey and the NeopragmatistsAndrew W. HowatDavid L. Hildebrand Beyond Realism & Anti-Realism: John Dewey and the Neopragmatists Nashville: Vanderbilt University Press, 2003. xii + 241 pp.In this book David Hildebrand provides a spirited defence of the philosophy of John Dewey, a defence he claims is faithful to his actual views and contrary to those of the "neopragmatists," specifically Hilary Putnam and Richard Rorty. (...) Hildebrand rejects the neopragmatist assumption that Dewey's oeuvre can support one or other side of the realism/anti-realism debate, at least without obscuring some of Dewey's vital insights. In particular, he thinks Rorty and Putnam miss the centrality and significance of Dewey's "Practical Starting Point" for philosophy and his understanding of key concepts such as "knowledge," "experience" and "inquiry." He argues that when taken together these insights show that Dewey transcends traditional debates about realism, and that this was the essence of his pragmatism.The first two chapters set out Dewey's views in the context of his contemporaries (especially the New and Critical Realists). They emphasise the radical nature of Dewey's position; that it aimed to supplant the well-established philosophical dualisms and debates of the day. Chapters Three and Four recount and criticise how Rorty and Putnam employ Dewey's insights to support near-opposite ends of the realism/anti-realism debate. The final chapter summarises and recapitulates the central themes and arguments of the book.Hildebrand describes his motivating worries as "pedagogical" and "political." If contemporary pragmatists serve as authorities on the subject, [End Page 296] this threatens to occlude the significance of classical texts for new students. This would be unfortunate, as those original texts are beautiful pieces of philosophy. Moreover, there is the danger that contemporary 'authorities' on pragmatism are mistaken, or have their own distorting agenda. It is thus vital that students and professionals continue to study original texts, gaining a grasp on this subtle and rewarding era of philosophy first-hand.Hildebrand's argument is immediately plausible, given that misinterpretations and caricatures of classical pragmatism are sadly common and familiar. It is also novel however, as it asserts pragmatism's foremost contemporary representatives are also guilty of misinterpretation. Hildebrand courts controversy, concluding his introduction by saying the neopragmatists "misuse central epistemological and metaphysical views of classical pragmatism for their own ends, all the while sustaining dualisms that the classical pragmatists fought to dissolve." This book may polarise opinion about Hildebrand's success, if so contemporary debate about pragmatism should be enriched.Readers may enjoy the novel account of New and Critical Realism in Chapter One, movements of which I knew nothing before reading the book. Hildebrand uses these movements to locate Dewey historically and dialectically amid the popular realism & idealism of his time. He demonstrates Dewey's views clearly diverged from those of his contemporaries, despite some of their best efforts to assimilate them for their realist or idealist cause. His main argument concerns Dewey's view that New Realists were responsible for hypostatising the faculties of knowledge and perception and conflating their products, resulting in paradoxical psychophysical dualism. They claimed that knowledge "can be simply had, in an instant," while Dewey insisted that "knowledge is an achievement, the eventual, alembicated product of inquiry," and that contrary to the way New Realists made it sound "Knowledge is never received like manna from heaven." Dewey's work on the reflex arc illustrated that perception is similarly an active or participatory process, though its products are distinct from those of knowledge. Hildebrand argues Dewey was trying to show how such mistakes created two crippling problems for New Realism: the problem of illusion and relapse into the very idealism the movement was designed to refute.Chapter Two concerns aspects of Dewey's views which realists (New and Critical) considered at odds with their own, implying too close an affinity with idealism. Like its predecessor this chapter would benefit from more (or better) examples to help elucidate Dewey's sometimes oblique prose. The dialectic is often highly abstract, focusing on such notions as the given (versus Dewey's preferred "taken"), Dewey's unusual understanding of temporal epistemology (knowledge of past... (shrink)

Charles Sanders Peirce famously claimed that ‘The opinion which is fated to be ultimately agreed to by all who investigate is what we mean by the truth’ (W3: 273). Christopher Hookway has argued for a highly distinctive interpretation of this claim in terms of speech-acts and the normative commitments we incur in performing them. So-construed, Peirce’s conception of truth is difficult to compare with standard theories of the concept, which tend to focus instead upon some property or feature that is (...) shared by all and only true propositions, and with whether or not that property is substantive or metaphysically significant. This paper examines Hookway’s interpretation of Peirce’s conception of truth in an effort to clarify its position in logical space. It then raises some difficulties for the way Hookway tries to accommodate Peirce’s remarks about the special status of assertion and belief in science. (shrink)

From 330b.c. Alexander transformed his court by adopting a number of court personnel and practices from the Achaemenids. This included the adoption by the king of a mixed Persian and Macedonian royal costume,proskynēsis, Persian spear-bearers and certain Persian officers, such as the chiliarch and the chief usher (εἰσαγγελεύς). But Alexander also used an imposing tent and an audience style modelled on that of the Great King. It is my intention here to investigate the Persian-style tent of Alexander and the two (...) court offices called the chiliarch and chief usher, associated with the king's new audience-style. (shrink)

Paracelsus was a transmutational alchemist: For most of his career, he believed that one metal could be turned into another. In an alchemical text, the De renovatione et restauratione, he explored the theoretical foundations of transmutation and hinted at recipes for bringing it about. He proposed that from plants, gems, metals, and minerals might be prepared a class of marvelous medicaments, which he called prima entia (first entities). Each primum ens had particular uses, but the entia were all supposed to (...) be able to revitalize the human body and cleanse it of disease. Certain entia could also transmute metals. The De renovatione et restauratione affirmed the metaphysical centrality, in goldmaking and medicine alike, not just of purification or alteration but of renewal and transformation. It expressed the author’s eschatological excitement at God’s works of wonder, whether within or above nature. (shrink)

In his influential book Truth, Paul Horwich deploys a philosophical method focused on linguistic usage, that is, on the function(s) the concept of truth serves in actual discourse. In doing so Horwich eschews abstract metaphysics, arguing that metaphysical or ontological conceptions of truth rest on basic misconceptions. From this description, one might reasonably expect Horwich's book to have drawn inspiration from, or even embodied philosophical pragmatism of some kind. Unfortunately Horwich relies upon Russell's tired caricature of pragmatism about truth (''p' (...) is true if and only if it is useful to believe p' (Ibid., p. 34, p. 47)), and as a result underestimates the challenge it poses to Minimalism. This paper develops a pragmatist critique of minimalism that focuses on the seemingly central, plausibly constitutive role played by the concept of truth in the speech-act of assertion. The critique suggests that Horwich's Minimalism does not and cannot accomplish its stated goal of explaining all of the facts involving truth. Indeed, the kind of thorough-going deflationism sought by Horwich and others (including pragmatist sympathizer Bob Brandom) is incompatible with an adequate account of assertion, and perhaps other concepts (like belief, judgement and inquiry) as well. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Religious Enthusiasm, the Spanish Inquisition, and the Disenchantment of the WorldAndrew KeittIn 1688 Anglican divine William Wharton published a short tract entitled The Enthusiasm of the Church of Rome demonstrated in some observations upon the life of Ignatius Loyola. Typical of the confessional propaganda of the day, Wharton's work contrasted the "rationality" of Protestantism with what he considered to be the superstition and obscurantism of the Catholic faith:It has (...) been the peculiar happiness of the Church of England to create a right sense of Religion and Piety in all her Communicants, and secure to them the practice of a rational Devotion. She makes no pretensions to private Inspirations, and extraordinary Illuminations of the Holy Ghost; and all her Children are more apt to deride, than admire the follies of the Enthusiasts.... Not so the Church of Rome, which in all her Offices and publick Ceremonies promotes and foments it, hath on many occasions given publick applause and approbation to it, and oweth the greatest part of her peculiar Doctrines, and present prosperity to the Enthusiasm of her Followers.1The "enthusiasm" to which Wharton refers had become the object of intense controversy in late seventeenth-century England. The term enthusiasm in this context meant highly emotional, deeply embodied religious experience in [End Page 231] the form of inspired raptures, miraculous revelations, and prophetic power. It was an epithet used with increasing frequency during this period to condemn not only Catholics but also members of radical Protestant sects such as the Diggers, Levellers, and Fifth Monarchy Men.The efforts of mainstream Protestant denominations to distance themselves from the "ultrasupernaturalism" of religious enthusiasts would seem to fit within a Weberian paradigm in which the Protestant Reformation functions as a catalyst for the "disenchantment of the world," the process by which the boundaries of the supernatural were supposedly rolled back in the modern West.2 Indeed, many historians of early modern Europe have adopted, either implicitly or explicitly, such a model. Lawrence Stone, for example, reflects this school of thought with his assertion that by the end of the seventeenth century, Protestantism's "more rational and coherent view of nature and its relationship to God's providence" created a worldview in which magical or miraculous explanations of events became increasingly untenable.3Catholicism, on the other hand, has often been portrayed as maintaining a more porous boundary between nature and supernature. Summarizing what he calls the "Weberian consensus," sociologist Peter Berger offers the following analysis, which reads remarkably like a translation of Wharton's characterization of Catholicism into the language of the social sciences:The Catholic lives in a world in which the sacred is mediated to him through a variety of channels—the sacraments of the church, the intercession of the saints, the recurring eruption of the "supernatural" in miracles—a vast continuity of being between the seen and the unseen.4In recent years, however, as historians have emphasized the structural parallels between the various confessions in Europe during the sixteenth and seventeenth centuries, such stark contrasts have become increasingly suspect.5 Consequently, scholars have underscored the need for comparative work on the topic. Michael Heyd, for example, has suggested such a strategy in his work on the reaction to religious enthusiasm in seventeenth-century Europe.6 [End Page 232] Although Heyd focuses primarily on the English case, he recommends an integrative, comparative approach. He describes how religious enthusiasm became "the subject of detailed analysis—theological, social, psychological and even medical" in the closing decades of the seventeenth century in England, and he details the efforts of both religious and secular authorities "to distinguish carefully between true inspiration and a false one, between the natural realm and the truly supernatural."7 Heyd links this reaction against religious enthusiasm to the disenchantment of the world and asks to what extent these trends were unique to the Anglican tradition in England.8Lorraine Daston has emphasized the need for comparative study as well. Religious enthusiasm plays an important role in Daston's "historical epistemology," which traces the development of modern notions of "fact" and "evidence," and their relationship to changing attitudes toward the miraculous in early modern Europe. The... (shrink)