The article develops and extends the theory of Glenn Kessler (Frege, Mill and the foundations of arithmetic, Journal of Philosophy 77, 1980) that a (cardinal) number is a relation between a heap and a unit-making property that structures the heap. For example, the relation between some swan body mass and "being a swan on the lake" could be 4.

A letter to The Times of London, May 9, 1992 protesting the Cambridge University proposal to award an honorary degree to M. Jacques Derrida.

The readiness potential (RP) is one of the most controversial topics in neuroscience and philosophy due to its perceived relevance to the role of conscious willing in action. Libet and colleagues reported that RP onset precedes both volitional movement and conscious awareness of willing that movement, suggesting that the experience of conscious will may not cause volitional movement (Libet, Gleason, Wright, & Pearl, 1983). Rather, they suggested that the RP indexes unconscious processes that may actually cause both volitional movement and (...) the accompanying conscious feeling of will (Libet et al., 1983; pg. 640). Here, we demonstrate that volitional movement can occur without an accompanying feeling of will. We additionally show that the neural processes indexed by RPs are insufficient to cause the experience of conscious willing. Specifically, RPs still occur when subjects make self-timed, endogenously-initiated movements due to a post-hypnotic suggestion, without a conscious feeling of having willed those movements. (shrink)

In Moral Knowledge? New Readings in Moral Epistemology, editors Walter Sinnott-Armstrong and Mark Timmons bring together eleven specially commissioned essays by distinguished moral philosophers exploring the nature and possibility of moral knowledge. Each essay represents a major position within the exciting field of moral epistemology in which a proponent of the position presents and defends his or her view and locates it vis-a-vis competing views. The authors include established philosophers such as Peter Railton, Robert Audi, Richard Brandt, and (...) Simon Blackburn, as well as newer voices in the field. Topics covered include moral skepticism, moral truth, projectivism, contractarianism, coherentism, feminist views, quasi-realism, and pragmatism. The lively and clear selections do not presuppose specialized knowledge of philosophy, and the philosophical vocabulary used throughout the anthology is uniform, in order to facilitate understanding by those not familiar with the field. The first chapter includes a sustained critical discussion of the major views represented in the following chapters, thereby furnishing beginning students with appropriate background to understand the selections. The volume is further enhanced by an index and an extensive bibliography. An excellent text for undergraduate and graduate courses, Moral Knowledge provides the most up-to-date work on moral knowledge and justification. (shrink)

The Monographs produced by the International Agency for Research on Cancer (IARC) apply rigorous procedures for the scientific review and evaluation of carcinogenic hazards by independent experts. The Preamble to the IARC Monographs, which outlines these procedures, was updated in 2019, following recommendations of a 2018 expert Advisory Group. This article presents the key features of the updated Preamble, a major milestone that will enable IARC to take advantage of recent scientific and procedural advances made during the 12 years since (...) the last Preamble amendments. The updated Preamble formalizes important developments already being pioneered in the Monographs Programme. These developments were taken forward in a clarified and strengthened process for identifying, reviewing, evaluating and integrating evidence to identify causes of human cancer. The advancements adopted include strengthening of systematic review methodologies; greater emphasis on mechanistic evidence, based on key characteristics of carcinogens; greater consideration of quality and informativeness in the critical evaluation of epidemiological studies, including their exposure assessment methods; improved harmonization of evaluation criteria for the different evidence streams; and a single-step process of integrating evidence on cancer in humans, cancer in experimental animals and mechanisms for reaching overall evaluations. In all, the updated Preamble underpins a stronger and more transparent method for the identification of carcinogenic hazards, the essential first step in cancer prevention. (shrink)

The Animal Ethics Reader is the first comprehensive, state-of-the-art anthology of readings on this substantial area of study and interest. A subject that regularly captures the headlines, the book is designed to appeal to anyone interested in tracing the history of the subject, as well as providing a powerful insight into the debate as it has developed. The recent wealth of material published in this area has not, until now, been collected in one volume. Readings are arranged thematically, carefully presenting (...) a balanced representation of the subject as it stands. It will be essential reading for students taking a course in the subject as well as being of considerable interest to the general reader. Articles are arranged under the following headings: Theories of Animal Ethics; Animal Capacities; Animals for Food; Animal Experimentation; Genetic Engineering of Animals; Ethics and Wildlife; Zoos, Aquaria, and Animals in Entertainment; Companion Animals; Legal Rights for Animals. Readings from leading experts in the field including Peter Singer, Mary Midgley and Bernard Rollin are featured as well as selections from Donald Griffin, Mark Bekoff, Jane Goodall, Raymond Frey, Barbara Orlans, Tom Regan, and Baird Callicott. There is an emphasis on balancing classic and contemporary readings with a view to presenting debates as they stand at this point in time. Each chapter is introduced by the editors and study questions feature at the end. The foreword has been written by Bernard Rollin. (shrink)

Philosophers and psychologists discuss new collaborative work in moral philosophy that draws on evolutionary psychology, cognitive science, and neuroscience. For much of the twentieth century, philosophy and science went their separate ways. In moral philosophy, fear of the so-called naturalistic fallacy kept moral philosophers from incorporating developments in biology and psychology. Since the 1990s, however, many philosophers have drawn on recent advances in cognitive psychology, brain science, and evolutionary psychology to inform their work. This collaborative trend is especially strong in (...) moral philosophy, and these volumes bring together some of the most innovative work by both philosophers and psychologists in this emerging interdisciplinary field. The contributors to volume 1 discuss recent work on the evolution of moral beliefs, attitudes, and emotions. Each chapter includes an essay, comments on the essay by other scholars, and a reply by the author of the original essay. Topics include a version of naturalism that avoids supposed fallacies, distinct neurocomputational systems for deontic reasoning, the evolutionary psychology of moral sentiments regarding incest, the sexual selection of moral virtues, the evolution of symbolic thought, and arguments both for and against innate morality. Taken together, the chapters demonstrate the value for both philosophy and psychology of collaborative efforts to understand the many complex aspects of morality. Contributors William Casebeer, Leda Cosmides, Oliver Curry, Michael Dietrich, Catherine Driscoll, Susan Dwyer, Owen Flanagan, Jerry Fodor, Gilbert Harman, Richard Joyce, Debra Lieberman, Ron Mallon, John Mikhail, Geoffrey Miller, Jesse Prinz, Peter Railton, Michael Ruse, Hagop Sarkissian, Walter Sinnott-Armstrong, Chandra Sekhar Sripada, Valerie Tiberius, John Tooby, Peter Tse, Kathleen Wallace, Arthur Wolf, David Wong. (shrink)

For much of the twentieth century, philosophy and science went their separate ways. In moral philosophy, fear of the so-called naturalistic fallacy kept moral philosophers from incorporating developments in biology and psychology. Since the 1990s, however, many philosophers have drawn on recent advances in cognitive psychology, brain science, and evolutionary psychology to inform their work. This collaborative trend is especially strong in moral philosophy, and these volumes bring together some of the most innovative work by both philosophers and psychologists in (...) this emerging interdisciplinary field. The contributors to volume 1 discuss recent work on the evolution of moral beliefs, attitudes, and emotions. Each chapter includes an essay, comments on the essay by other scholars, and a reply by the author of the original essay. Topics include a version of naturalism that avoids supposed fallacies, distinct neurocomputational systems for deontic reasoning, the evolutionary psychology of moral sentiments regarding incest, the sexual selection of moral virtues, the evolution of symbolic thought, and arguments both for and against innate morality. Taken together, the chapters demonstrate the value for both philosophy and psychology of collaborative efforts to understand the many complex aspects of morality. Contributors: William Casebeer, Leda Cosmides, Oliver Curry, Michael Dietrich, Catherine Driscoll, Susan Dwyer, Owen Flanagan, Jerry Fodor, Gilbert Harman, Richard Joyce, Debra Lieberman, Ron Mallon, John Mikhail, Geoffrey Miller, Jesse Prinz, Peter Railton, Michael Ruse, Hagop Sarkissian, Walter Sinnott-Armstrong, Chandra Sekhar Sripada, Valerie Tiberius, John Tooby, Peter Tse, Kathleen Wallace, Arthur Wolf, David Wong Walter Sinnott-Armstrong is Professor of Philosophy and Hardy Professor of Legal Studies at Dartmouth College. (shrink)

Armstrong's Materialist Theory of Mind is one of a handful of texts that began the physicalist revolution in the philosophy of mind. In this collection, distinguished philosophers examine what we still owe to it, how to expand it, as well as looking back on how it came about.

In Moral Knowledge?: New Readings in Moral Epistemology, editors Walter Sinnott-Armstrong and Mark Timmons bring together eleven newly written essays by distinguished moral philosophers exploring the nature and possibility of moral knowledge. Each essay represents a major position within the exciting field of moral epistemology in which a proponent of the position presents and defends his or her view and locates it vis-a-vis competing views. The first chapter, written by Walter Sinnott-Armstrong, provides a framework for understanding the basic (...) concepts and viewpoints in moral epistemology and presents a limited skeptical challenge to the justification of moral beliefs. The following essays represent various options in response to moral skepticism. Peter Railton and Simon Blackburn take different stances on moral truth and realism, Robert Audi defends a version of intuitionism, and Geoffrey Sayre-McCord adopts coherentism, while R.M. Hare combines elements of both foundationalism and coherentism. Richard Brandt discusses the relevance of empirical science to moral knowledge, Christopher Morris develops a contractarian account of moral justification, and David Copp bases moral knowledge on rational choices by societies. Margaret Urban Walker aruges for a feminist perspective on moral knowledge, and Mark Timmons expounds contextualism in moral epistemology. The lively and clear selections do not presuppose specialized knowledge of philosophy, and the philosophical vocabulary used throughout the anthology is uniform, in order to facilitate understanding by those not familiar with the field. The first chapter includes a sustained critical discussion of the major views represented in the following chapters, thereby furnishing beginning students with appropriate background to understand the selections. The volume is further enhanced by an index and an extensive bibliography, which is divided into sections corresponding to the chapters of the book. Moral Knowledge provides the most up-to-date work on moral knowledge and justification and serves as an excellent text for undergraduate and graduate courses. (shrink)

I reply to comments by Gerry Hough, Peter Baumann and Martijn Blaauw on my book Moral Skepticisms. The main issues concern whether modest justifiedness is epistemic and how it is related to extreme justifiedness; how contrastivists can handle crazy contrast classes, indeterminacy and common language; whether Pyrrhonian scepticism leads to paralysis in decision-making or satisfies our desires to evaluate beliefs as justified or not; and how contextualists can respond to my arguments against relevance of contrast classes.

In his recent book Moral Skepticisms Walter Sinnott-Armstrong argues in great detail for contrastivism with respect to justified moral belief and moral knowledge. I raise three questions concerning this view. First, how would Sinnott-Armstrong account for constraints on admissible contrast classes? Secondly, how would he deal with notorious problems concerning relevant reference classes? Finally, how can he account for basic features of moral agency? It turns out that the last problem is the most serious one for his account.

Environmental ethics would greatly benefit from an adequate metaphysical foundation. In an attempt to demonstrate the value of Whitehead’s metaphysical system as such a foundation, I first discuss five central tenets of his thought. I then compare aspects of his philosophy with Peter Singer’s utilitarianism, Tom Regan’s rights theory, Aldo Leopold’s land ethic, and Spinoza's system in order to indicate how aWhiteheadian approach can solve the difficulties of the other views as currently developed, and provide the basis for an (...) environmental ethics which values individual entities in themselves and in their connectedness in a purposive natural order. (shrink)

The Animal Ethics Reader is an acclaimed anthology containing both classic and contemporary readings, making it ideal for anyone coming to the subject for the first time. It provides a thorough introduction to the central topics, controversies and ethical dilemmas surrounding the treatment of animals, covering a wide range of contemporary issues, such as animal activism, genetic engineering, and environmental ethics. The extracts are arranged thematically under the following clear headings: Theories of Animal Ethics Nonhuman Animal Experiences Primates and Cetaceans (...) Animals for Food Animal Experimentation Animals and Biotechnology Ethics and Wildlife Zoos and Aquariums Animal Companions Animal Law and Animal Activism Readings from leading experts in the field including Peter Singer, Bernard E. Rollin and Jane Goodall are featured, as well as selections from Tom Regan, Jane Goodall, Donald Griffin, Temple Grandin, Ben A. Minteer, Christine Korsgaard and Mark Rowlands. Classic extracts are well balanced with contemporary selections, helping to present the latest developments in the field. This revised and updated _Third Edition_ includes 31 new readings on a range of subjects, including animal rights, captive chimpanzees, industrial farm animal production, genetic engineering, keeping cetaceans in captivity, animal cruelty, and animal activism. The _Third Edition _also is printed with a slightly larger page format and in an easier-to-read typeface. Featuring contextualizing introductions by the editors, study questions and further reading suggestions as the end of each chapter, this will be essential reading for any student taking a course in the subject. With a new foreword by Bernard E. Rollin. (shrink)

This article examines Olivier Rolin's use of stream of consciousness narration in L'invention du monde (1993). It draws upon philosophers Peter Sloterdijk and Paul Virilio to propose that the novel—with its obsessions for information, technology, and space—depicts a crossroads of subjectivity. At that crossroads, natural and computational connotations of "stream" collide, fueling the novel's central crisis. The misadventures of Rolin's postmodern, post-industrial, satellite-inspired Phileas Fogg reveal a central conundrum of accelerated globalization: namely, that the informational and technological mastery of (...) our world comes at the price of sacrificing the ability to meaningfully position oneself within it. (shrink)

Theories that posit metaphysical structure are able to do much work in philosophy. Some, however, find the notion of ‘metaphysical structure’ unintelligible. In this paper, I argue that their charge of unintelligibility fails. There is nothing distinctively problematic about the notion. At best, their charge of unintelligibility is a mere reiteration of previous complaints made toward similar notions. In developing their charge, I clarify several important concepts, including primitiveness, intelligibility, and the Armstrong-inspired “ontologism” view of the world. I argue (...) that, ultimately, their charge is best understood as an objection whose central premise is that the notion of ‘structure’ runs contrary to an important presupposition of contemporary metaphysics. But that central premise is, on closer inspection, implausible. I respond to the objection by identifying three popular metaphysical theories that violate the alleged presupposition but are still generally regarded as intelligible. The objection thus fails to show that a theory that posits metaphysical structure is unintelligible. (shrink)

The Animal Ethics Reader is the first comprehensive, state-of-the-art anthology of readings on this substantial area of study and interest. A subject that regularly captures the headlines, the book is designed to appeal to anyone interested in tracing the history of the subject, as well as providing a powerful insight into the debate as it has developed. The recent wealth of material published in this area has not, until now, been collected in one volume. Readings are arranged thematically, carefully presenting (...) a balanced representation of the subject as it stands. It will be essential reading for students taking a course in the subject as well as being of considerable interest to the general reader. Articles are arranged under the following headings: Theories of Animal Ethics Animal Capacities Animals for Food Animal Experimentation Genetic Engineering of Animals Ethics and Wildlife Zoos, Aquaria, and Animals in Entertainment Companion Animals Legal Rights for Animals Readings from leading experts in the field including Peter Singer, Mary Midgely and Bernard Rollin are featured as well as selections from Donald Griffin, Mark Bekoff, Jane Goodall, Raymond Frey, Barbara Orlans, Tom Regan, and Baird Callicott. There is an emphasis on balancing classic and contemporary readings with a view to presenting debates as they stand at this point in time. Each chapter is introduced by the editors and study questions feature at the end. The foreword has been written by Bernard Rollin. This will be appropriate reading for students taking courses in philosophy, ethics, zoology, animal science, psychology, veterinary medicine, law, environmental science and religion. (shrink)

Armstrong holds the Supervenience Theory of instantiation, namely that the instantiation of universals by particulars supervenes upon what particulars and what universals there are, where supervenience is stipulated to be explanatory or dependent supervenience. I begin by rejecting the Supervenience Theory of instantiation. Having done so it is then tempting to take instantiation as primitive. This has, however, an awkward consequence, undermining one of the main advantages universals have over tropes. So I examine another account hinted at by (...) class='Hi'>Armstrong. This is the Operator Theory of instantiation, by which I mean the theory that universals are operators, and that a particular instantiates a monadic universal because the universal operates on the particular, resulting in the state of affairs. On this theory the state of affairs supervenes on the instantiation rather than vice versa. In the second part of the paper I develop this theory of universals as operators, including an account of structural universals, which are useful for accounts of modality and of mathematics. (shrink)

In this chapter I assume that we accept, perhaps reluctantly, general facts, that is states of affairs corresponding to universal generalizations. I then argue that, without any addition, this ontology provides us with physical necessities, and moreover with various grades of physical necessity, including the strongest grade, which I call absolute physical necessity. In addition there are consequences for our understanding of time. For this account, which I call the Mortmain Theory, provides a defence of No Futurism against an otherwise (...) serious objection due to David Armstrong. In addition the Mortmain theory enables me to argue against the ‘‘Parmenidean’’ or Block Universe position that future and past are both real. (shrink)

In his “Are Properties, Particular, Universal, or Neither?” Javier Cumpa argues that science not metaphysics explains how properties are instantiated. I accept this conclusion provided physics can be stated using rather few primitive predicates. In addition, he uses his scientific theory of instantiation to argue for Neutralism, his thesis that the “tie” between properties and their instances implies neither that properties are particular nor that they are universals. Neutralism, I claim, is a thesis that realist about universals have independent reason (...) to accept and their opponents have reason to reject. So, neutralism is not neutral on the topic of whether properties are universals. Nor is Cumpa’s Theory of Instantiation as naturalistic as he claims. I argue that although compatible with Ontological Naturalism, his theory provides a precedent for the non-naturalistic emergence of mental properties. Finally, I argue that because his theory requires a simple physics it presupposes a more rationalist epistemology than that of Methodological Naturalism. (shrink)

Truthmaker theorists hold that propositions about higher-level entities (e.g. the proposition that there is a heap of sand) are often made true by lower-level entities (e.g. by facts about the configuration of fundamental particles). This generates a problem: what should we say about these higher-level entities? On the one hand, they must exist (since there are true propositions about them), on the other hand, it seems that they are completely superfluous and should be banished for reasons of ontological parsimony. Some (...) truthmaker theorists—most prominently David Armstrong—have tried to solve this puzzle by arguing that these entities are ‘an ontological free lunch’, i.e. real existents that are still ‘no addition of being’. This answer is prima facie attractive, but I argue in this paper that the standard approaches to truthmaking—modal theories and grounding theories—are unable to vindicate the doctrine of the ontological free lunch, and thus fail to solve the problem of higher-level entities. Fortunately, there is a non-standard account of truthmaking available, the reductive explanation account, which succeeds where the standard approaches fail. (shrink)

ABSTRACTBy the Many Categories problem, I mean the prima facie violation of Ockham’s Razor by realists about universals: there is, it might seem, just too much variety. Thus, David Armstrong posits both properties and relations. He also theorises about determinates of determinables. Another influential realist, E. J. Lowe distinguishes non-substantial from substantial universals. Yet again, both Armstrong and Lowe include in their ontology abstract particulars in addition to universals. My aim in this paper is to offer a unification (...) of these categories using an operator-theory. First, I show how operators provide a theory of abstract particulars of relations and of impure relational properties. Then, using impure relational properties I derive the Fregeanion Principle. After some metaphysics of mathematics, I provide a theory of determinables. Finally, I consider kinds and substances. (shrink)

This book advocates dispositional essentialism, the view that natural properties have dispositional essences. 1 So, for example, the essence of the property of being negatively charged is to be disposed to attract positively charged objects. From this fact it follows that it is a law that all negatively charged objects will attract positively charged objects; and indeed that this law is metaphysically necessary. Since the identity of the property of being negatively charged is determined by its being related in a (...) certain way to the property of being positively charged, in any world in which these properties exist they must be related so that all negatively charged objects attract positively charged objects.Bird opposes his dispositional essentialism to the view that properties are categorical in nature, with their identities grounded in quiddities that are not exhausted by their relations to other properties. The main exponents of this view are D.M. Armstrong and David Lewis. They take the laws of nature to be contingent though they entertain very different views about their nature: Armstrong is a necessitarian about laws, taking them to be relations of nomic necessitation between universals, while Lewis is a Humean about laws who takes them to be a special kind of regularity. The book is a sustained defence of the dispositional essentialist conception of properties and laws against the competing conceptions espoused by Armstrong and Lewis. One rough way to characterize the difference between these conceptions is to say that the categoricalist sees properties as passive and inert with the laws of nature being fixed independently of the nature of properties whereas, in contrast, the dispositional essentialist sees properties as active potencies from which the laws of nature automatically spring. A slightly more tendentious way to express the difference is to say, as Bird does, that the …. (shrink)

D. M. Armstrong, Michael Tooley, and Fred Dretske have recently proposed a new realist account of laws of nature, according to which laws of nature are objective relations between universals. After criticizing this account, I develop an alternative realist account, according to which (1) the nomic structure of a world is a relation between initial world-histories and world-histories, and (2) a law of nature is a fact that holds solely in virtue of nomic structure (and not, for example, in (...) virtue of past history). (shrink)

Is observational indiscriminability non-transitive? This was once an accepted truth, and it was used by philosophers like Armstrong and Dummett to argue against the existence of appearances (sense data, sensory items). It was objected, however, early on by Jackson and Pinkerton, and more recently by vagueness contextualists like Raffman and Fara, that the case for non-transitivity is flawed. The reason is the context dependence of appearance. I argue here that if we take context dependence properly into account, we still (...) have (a modified version of) non-transitivity, and that therefore we still face the problem of appearances. (shrink)

David Armstrong in his A Combinatorial Theory of Possibility proposes that non-actual possibilities may be treated as fictions grounded in instantiated universals. In this paper, I first provide some objections to his theory. Then I make the case for Foundational Nominalism, the Armstrong inspired thesis that the whole of ontology supervenes on particulars described much as in the Quinean Nominalism that Armstrong rejected as an ontological ostrich. Finally, I argue that Foundational Nominalism permits a fictional theory of (...) possibilities similar to Brian Skyrms’ Tractarian Nominalism. (shrink)

This book advocates dispositional essentialism, the view that natural properties have dispositional essences.1 So, for example, the essence of the property of being negatively charged is to be disposed to attract positively charged objects. From this fact it follows that it is a law that all negatively charged objects will attract positively 10 charged objects; and indeed that this law is metaphysically necessary. Since the identity of the property of being negatively charged is determined by its being related in a (...) certain way to the property of being positively charged, in any world in which these properties exist they must be related so that all negatively charged objects attract positively charged objects. 15 Bird opposes his dispositional essentialism to the view that properties are categorical in nature, with their identities grounded in quiddities that are not exhausted by their relations to other properties. The main exponents of this view are D.M. Armstrong and David Lewis. They take the laws of nature to be contingent though they entertain very different views about their nature: Armstrong is a necessitarian 20 about laws, taking them to be relations of nomic necessitation between universals, while Lewis is a Humean about laws who takes them to be a special kind of regularity. The book is a sustained defence of the dispositional essentialist conception of properties and laws against the competing conceptions espoused by Armstrong and Lewis. One rough way to characterize the difference between these conceptions is to say that 25 the categoricalist sees properties as passive and inert with the laws of nature being fixed independently of the nature of properties whereas, in contrast, the dispositional essentialist sees properties as active potencies from which the laws of nature automatically spring. A slightly more tendentious way to express the difference is to say, as Bird does, that the categoricalist views embrace the Humean doctrine that there are no 30 necessary connexions in nature, while the dispositional essentialist view, on the other hand, repudiates this doctrine.. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy, Psychiatry, & Psychology 10.2 (2003) 161-167 [Access article in PDF] Social, Cognitive, and Neural Constraints on Subjectivity and Agency:Implications for Dissociative Identity Disorder Peter Q. Deeley In this commentary, I consider Matthew's argument after making some general observations about dissociative identity disorder (DID). In contrast to Matthew's statement that "cases of DID, although not science fiction, are extraordinary" (p. 148), I believe that there are natural analogs (...) of the disorder that, when considered, make it seem less puzzling and exotic. After discussing these examples, I examine the relations between social, cognitive, and neural processes supporting subjectivity and agency, to identify sources of personal identity in cases of DID that can be used as a basis for assessing Matthew's points against Behnke and Sinnott-Armstrong. I am not proposing a comprehensive theory, but rather identifying what I believe are components of such a theory. I then outline an approach to determining criminal responsibility in DID, drawing on analogies with other psychiatric disorders. Dissociative Identity Disorder DID is a disorder described in DSM-IV, which "is characterised by the presence of two or more distinct identities or personality states that recurrently take control of the individual's behaviour accompanied by an inability to recall important personal information that is too extensive to be explained by ordinary forgetfulness" (American Psychiatric Association, p. 519). Recognizing Personal Identity How is personal identity recognized in normal cognition? If we take personhood to involve recognition of continuity of social, psychological, and physical identity for a given individual, then such judgments are routinely made rapidly and automatically as an aspect of what has come to be termed social cognition (Adolphs 2003). There is likely to be considerable redundancy in [End Page 161] the types of information used to make judgments about whether a person is the same as one who was previously encountered, or perhaps heard about—for example, facial features, movement patterns, speech prosody, dress, speech content, gender, ethnicity, social role, among other features, all provide information about individual identity, and hence personhood. When uncertainty exists, it is likely to reflect a loss or alteration of cues that would ordinarily be used in a rapid, automatic, unexamined way (Adolphs 2003). In such extreme cases (for example, severe mental illness or disfigurement), the problem of identification becomes the subject of explicit reasoning (and hence of potential disagreement, because we then engage in post hoc rationalizations to establish criteria for determining personhood, whereas normally we rely on essentially automatic, implicit abilities that work in most circumstances, some of which make little use of linguistic representations and formal reasoning—for example, individual facial identity recognition, which may occur as quickly as 170 ms after stimulus onset [Adolphs 2003]). Nevertheless, examining our judgments and intuitions in cases that force us to explicitly consider whether personal identity is preserved may provide analogies and clues for how we should proceed with DID. Let us consider, then, some natural analogs of DID. Natural Analogs of DID Method Acting I suggest that method acting is an analog of DID (Manderino 1985). Method acting refers to an approach to acting training and performance in which emphasis is placed on intensely imagining and identifying with the mental life of the character being portrayed. Training courses and manuals list many techniques and practices that can be used to facilitate absorption in a role, drawing on different kinds of memory—for example, experiential memories, memories of others, general knowledge (semantic memory), and memories of sensations and feelings, to creative a vivid sense of the subjective experience and actions of the character. Manderino, a method acting teacher, comments: "it is important to investigate the way in which your own mental makeup can improperly influence a character. Insecurities, self-consciousness, shyness or self-doubts can maintain a strong hold, and permitting any of these feelings to enter a performance is to remain the actor and not enter into the mental life of the character. For some, acting allows personal problems to be left behind, and they are thankful for the complete escape that... (shrink)

This reissue of his collection of early essays, Logico-Linguistic Papers, is published with a brand new introduction by Professor Strawson but, apart from minor ...