Many philosophers hypothesize that our concept of personal identity is partly constituted by the one-person-one-place rule, which states that a person can only be in one place at a time. This hypothesis has been assumed by the most influential contemporary work on personal identity. In this paper, we report a series of studies testing whether the hypothesis is true. In these studies, people consistently judged that the same person existed in two different places at the same (...) time. This result undermines some widely held philosophical assumptions, supports others, and fits well with recent discoveries on identity judgments about inanimate objects and non-human animals. (shrink)

When talking about personal identity in the context of medical ethics, ethicists tend to borrow haphazardly from different philosophical notions of personal identity, or to abjure these abstract metaphysical concerns as having nothing to do with practical questions in medical ethics. In fact, however, part of the moral authority for respecting a patient’s self-regarding decisions can only be made sense of if we make certain assumptions that are central to a particular, psychological picture of personal (...) identity, namely, that patients will remain psychologically connected to a certain degree with their future selves. I draw this out, show problems with approaches in medical ethics based on alternate theories of personal identity that do not recognise this, and explore some important implications. Namely, I show how this recognition can better explain the circumstances under which we should respect advance directives and why, and how it can better make sense of patient fears that they will not "survive" personality-altering deep brain stimulation procedures, and provide guidance on approaching patient decisions concerning this type of procedure in a manner that captures and addresses such concerns. (shrink)

Our aim in this entry is to articulate the state of the art in the moral psychology of personal identity. We begin by discussing the major philosophical theories of personal identity, including their shortcomings. We then turn to recent psychological work on personal identity and the self, investigations that often illuminate our person-related normative concerns. We conclude by discussing the implications of this psychological work for some contemporary philosophical theories and suggesting fruitful areas for (...) future work on personal identity. (shrink)

Phineas Gage’s story is typically offered as a paradigm example supporting the view that part of what matters for personal identity is a certain magnitude of similarity between earlier and later individuals. Yet, reconsidering a slight variant of Phineas Gage’s story indicates that it is not just magnitude of similarity, but also the direction of change that affects personal identity judgments; in some cases, changes for the worse are more seen as identity-severing than changes for (...) the better of comparable magnitude. Ironically, thinking carefully about Phineas Gage’s story tells against the thesis it is typically taken to support. (shrink)

The personal identity relation is of great interest to philosophers, who often consider fictional scenarios to test what features seem to make persons persist through time. But often real examples of neuroscientific interest also provide important tests of personal identity. One such example is the case of Phineas Gage – or at least the story often told about Phineas Gage. Many cite Gage’s story as example of severed personal identity; Phineas underwent such a tremendous (...) change that Gage “survived as a different man.” I discuss a recent empirical finding about judgments about this hypothetical. It is not just the magnitude of the change that affects identity judgment; it is also the negative direction of the change. I present an experiment suggesting that direction of change also affects neuroethical judgments. I conclude we should consider carefully the way in which improvements and deteriorations affect attributions of personal identity. This is particularly important since a number of the most crucial neuroethical decisions involve varieties of cognitive enhancements or deteriorations. (shrink)

Personal identity deals with questions about ourselves qua people (or persons). Many of these questions are familiar ones that occur to everyone at some time: What am I? When did I begin? What will happen to me when I die? Discussions of personal identity go right back to the origins of Western philosophy, and most major figures have had something to say about it. (There is also a rich literature on personal identity in Eastern (...) philosophy, which I am not competent to discuss. Collins 1982 is a good source.). (shrink)

What is the self? And how does it relate to the body? In the second edition of Personal Identity, Harold Noonan presents the major historical theories of personal identity, particularly those of Locke, Leibniz, Butler, Reid and Hume. Noonan goes on to give a careful analysis of what the problem of personal identity is, and its place in the context of more general puzzles about identity. He then moves on to consider the main (...) issues and arguments which are the subject of current debate, including the work of Bernard Williams and Derek Parfit, and makes new and challenging interpretations of them. This new edition contains additional material assessing the biological approach which has become increasingly popular in recent years, and extends the treatment of indeterminate identity to take account of the epistemic view of vagueness. This book covers the problem of personal identity from its origin in Locke's work to the most recent debates in the philosophical literature, and will be invaluablereading for any student of the topic. (shrink)

Contents PART I: INTRODUCTION 1 John Perry: The Problem of Personal Identity, 3 PART II: VERSIONS OF THE MEMORY THEORY 2 John Locke: Of Identity and ...

Personal identity is not always symmetric: even if I will not be a later person, the later person may have been me. What makes this possible is that the relations that are criterial of personal identity---such as memory and anticipation---are asymmetric and "count in favor of personal identity from one side only". Asymmetric personal identity can be accommodated by temporal counterpart theory but not by Lewisian overlapping aggregates of person stages. The question (...) of uncertainty in cases of personal fission (and in Everettian quantum mechanics) is also discussed. (shrink)

‘Soul’, ‘self’, ‘substance’ and ‘person’ are just four of the terms often used to refer to the human individual. Cutting across metaphysics, ethics, and religion the nature of personal identity is a fundamental and long-standing puzzle in philosophy. Personal Identity and Applied Ethics introduces and examines different conceptions of the self, our nature, and personal identity and considers the implications of these for applied ethics. A key feature of the book is that it considers (...) a range of different approaches to personal identity; philosophical, religious, and cross-cultural, including perspectives from non-Western traditions. Within this comparative framework, Andrea Sauchelli examines the following topics: -Early views of the soul in Plato, Christianity, and Descartes -The Buddhist ‘no-self’ views and the self as a fiction -Confucian ideas of our nature and the importance of self-cultivation as constitutive of the self -Locke’s theory of personal identity as continuity of consciousness and memory and objections to Locke’s argument by Butler and Reid as well as contemporary critics -The theory of ‘animalism’ and arguments concerning embodied concepts of personal identity -Practical and narrative theories of personal identity and moral agency -Personal identity and issues in applied ethics, including abortion, organ transplantation, and the idea of life after death -Implications of life-extending technologies for personal identity. Throughout the book Sauchelli also considers the views of important recent philosophers of personal identity such as Sydney Shoemaker, Bernard Williams, Derek Parfit, Marya Schechtman, and Christine Korsgaard, placing these in helpful historical context. Chapter summaries, a glossary of key terms, and suggestions for further reading make this a refreshing, approachable introduction to personal identity and applied ethics. It is an ideal text for courses on personal identity that consider both Western and non-Western approaches and that apply theories of personal identity to ethical problems. It will also be of interest to those in related subjects such as religious studies and history of ideas. (shrink)

Let the moral question of personal identity be the following: what is the nature of the entities we should focus our prudential concerns and ascriptions of responsibility around? (If indeed we should structure these things around any entities at all.) Let the semantic question of personal identity be the question of what is the nature of the entities that ‘person’ is true of. A naive (in the sense of simple and intuitive) view would have it that (...) the two questions are so intimately connected that the entities we should focus our concerns and ascriptions around are, pretty trivially, the persons. In part, my aim here is to evaluate this naive view. However, I will not actually attempt to give a definite verdict on it. Rather, I will identify the assumptions under which the naive view is true, and discuss how to go about evaluating those assumptions. (shrink)

In this paper I outline and defend a new approach to personal-identity—personal-identity non-cognitivism—and argue that it has several advantages over its cognitivist rivals. On this view utterances of personal-identity sentences express a non-cognitive attitude towards relevant person-stages. The resulting view offers a pleasingly nuanced picture of what we are doing when we utter such sentences.

What does it mean to say that this person at this time is 'the same' as that person at an earlier time? If the brain is damaged or the memory lost, how far does a person's identity continue? In this book two eminent philosophers develop very different approaches to the problem.

There are two main views about the nature of personal identity. I shall briehy describe these views, say without argument which I believe to be true, and then discuss the implications of this view for one of the main conceptions of rationality. This conception I shall call "C1assical Prudence." I shall argue that, on what I believe to be the true view about personal identity, Classical Prudence is indefensible.

This paper defends a version of strong conventionalism minus the ontological commitments of that view. It defends the claim that strictly speaking there are no persons, whilst explicating how to make sense of talk that is about (or purportedly about) persons, by appealing to features in common to conventionalist accounts of personal identity. This view has the many benefits of conventionalist accounts in being flexible enough to deal with problem cases, whilst also avoiding the various worries associated with (...) the existence of both persons and human animals occupying the same place at the same time to which conventionalist accounts are committed. (shrink)

Personal identity deals with philosophical questions that arise about ourselves by virtue of our being people (or, as lawyers and philosophers like to say, persons). This chapter first surveys the main questions of personal identity, and then focuses on the one that has received most attention in recent times, namely our persistence through time. There is no single problem of personal identity, but rather a wide range of questions that are at best loosely connected. (...) The familiar ones include: who am I, what is it to be a person, and what does it take for a person to persist from one time to another. There are three main sorts of answers to the persistence question in the literature: the most popular psychological‐continuity views, according to which the holding of some psychological relation is necessary or sufficient (or both) for one to persist; brute‐physical views; and anticriterialism. (shrink)

This volume collects a number of Perry's classic works on personal identity as well as four new pieces, 'The Two Faces of Identity', 'Persons and Information', 'Self-Notions and The Self' and 'The Sense of Identity'. Perry's Introduction puts his own work and that of others on the issues of identity and personal identity in the context of philosophical studies of mind and language over the past thirty years.

Hume is famous for his criticism of substantial minds, free will, and self-consciousness—central elements in traditional philosophical accounts of persons. His empiricism dissolves self-inspecting minds into heaps of distinct perceptions and turns cognitive faculties into successions of causally related, discrete impressions and ideas. Whatever regularities the complex ideas and their bundles or heaps display are explained by laws of association of ideas, which are supposed to play the same role in the mental world as Newton’s laws of gravitation play in (...) physical nature. This paper explores some strands of the new science of man proposed in Hume’s Treatise, in particular his account of personal identity.. (shrink)

_Personal Identity and Self-Consciousness_ is about persons and personal identity. What are we? And why does personal identity matter? Brian Garrett, using jargon-free language, addresses questions in the metaphysics of personal identity, questions in value theory, and discusses questions about the first person singular. Brian Garrett makes an important contribution to the philosophy of personal identity and mind, and to epistemology.

Recent legal rulings concerning the status of advance statements have raised interest in the topic but failed to provide any definitive general guidelines for their enforcement. I examine arguments used to justify the moral authority of such statements. The fundamental ethical issue I am concerned with is how accounts of personal identity underpin our account of moral authority through the connection between personal identity and autonomy. I focus on how recent Animalist accounts of personal (...) class='Hi'>identity initially appear to provide a sound basis for extending the moral autonomy of an individual - and hence their autonomous wishes expressed through an advance directive - past the point of severe psychological decline. I argue that neither the traditional psychological account nor the more recent Animalist account of personal identity manage to provide a sufficient basis for extending our moral autonomy past the point of incapacity or incompetence. I briefly explore how analogies to similar areas in law designed to facilitate autonomous decision, such as wills and trusts, provide at best only very limited scope for an alternative justification for granting advance statements any legal or moral authority. I conclude that whilst advance statements play a useful role in formulating what treatment is in a patient’s best interests, such statements do not ultimately have sufficient moral force to take precedence over paternalistic best interest judgements concerning an individual’s care or treatment. (shrink)

This chapter contains sections titled: The Problems of Personal Identity Understanding the Persistence Question Accounts of Our Identity Through Time The Psychological Approach The Fission Problem The Problem of the Thinking Animal The Somatic Approach Conclusion.

What justifies our holding a person morally responsible for some past action? Why am I justified in having a special prudential concern for some future persons and not others? Why do many of us think that maximizing the good within a single life is perfectly acceptable, but maximizing the good across lives is wrong? In these and other normative questions, it looks like any answer we come up with will have to make an essential reference to personal identity. (...) So, for instance, it seems we are justified in holding X responsible for some past action only if X is identical to the person who performed that action. Further, it seems I am justified in my special concern for some future person only if he will be me. Finally, many of us think that while maximization within a life affects only one person, a metaphysical unity, maximization across lives affects many different, metaphysically distinct, persons, and so the latter is wrong insofar as it ignores this fundamental separateness of persons. (shrink)

Philosophers concerned with the question of personal identity have typically been asking the so-called re-identification question: what are the conditions under which a person at one point in time is properly re-identified at another point in time? This is a rather technical question. In our everyday interactions, however, we do raise a number of personal identity questions that are quite distinct from it. In order to explore the variety of ways in which the Internet may affect (...) personal identity, I propose in this study to broaden the typical philosophical horizon to other more mundane senses of the question. In Section 2, I describe a number of possible meanings of personal identity observed in everyday contexts and more philosophical ones. With some caveats, I argue that it is the specific context in which the question arises that disambiguates the meaning of the question. Online contexts are novel and peculiar insofar as they afford prolonged disembodied and anonymous interaction with others. In line with our previous conclusion, then, there is reason to suspect that such contexts generate new and sui generis answers to the personal identity question. In Section 3, I examine this question and, contrary to expectations, largely dispel this suspicion. Finally, in Section 4, I discuss the often-heard claim to the effect that disembodiment and anonymity foster the creation of distinct and incompatible online and offline identities. (shrink)

In the second edition of the Essay Concerning Human Understanding, John Locke argues that personal identity over time consists in sameness of consciousness rather than the persistence of any substance, material or immaterial. Something about this view is very compelling, but as it stands it is too vague and problematic to provide a viable account of personal identity. Contemporary "psychological continuity theorists" have tried to amend Locke's view to capture his insights and avoid his difficulties. This (...) paper argues that the standard approach fails because it takes Locke to be a memory theorist, and does not focus enough on his claim that we need continuity of consciousness for personal persistence. An alternative reading of Locke is offered, emphasizing the role of self-understanding in producing continuity of consciousness. This alternative overcomes the difficulties with the standard approach, and shows how it is possible to attribute unconscious psychological elements to a person, even when personal persistence is defined in terms of consciousness. (shrink)

My topic is personal identity, or rather, our identity. There is general, but not, of course, unanimous, agreement that it is wrong to give an account of what is involved in, and essential to, our persistence over time which requires the existence of immaterial entities, but, it seems to me, there is no consensus about how, within, what might be called this naturalistic framework, we should best procede. This lack of consensus, no doubt, reflects the difficulty, which (...) must strike anyone who has considered the issue, of achieving, just in one's own thinking, a reflective equilibrium. The theory of personal identity, I feel, provides a curious contrast. On the one side, it seems highly important to know what sort of thing we are, but, on the other, it is hard to find any answer which has a ‘solid’ feel. (shrink)

Many philosophers have taken there to be an important relation between personal identity and several of our practical concerns (among them moral responsibility, compensation, and self-concern). I articulate four natural methodological assumptions made by those wanting to construct a theory of the relation between identity and practical concerns, and I point out powerful objections to each assumption, objections constituting serious methodological obstacles to the overall project. I then attempt to offer replies to each general objection in a (...) way that leaves the project intact, albeit significantly changed. Perhaps the most important change stems from the recognition that the practical concerns motivating investigation into personal identity turn out to be not univocal, as is typically thought, such that each of the different practical concerns may actually be related to personal identity in very different ways. (shrink)

Personal Identity and Ethics provides a lively overview of the relationship between the metaphysics of personal identity and ethics. How does personal identity affect our ethical judgments? It is a commonplace to hold that moral responsibility for past actions requires that the responsible agent is in some relevant respect identical to the agent who performed the action. Is this true? On the other hand, can ethics constrain our account of personal identity? Do (...) the practical requirements of moral theory commit us to holding that persons do remain identical over time? Or is it the case that personal identity is not, in fact, relevant to ethics? -/- Shoemaker provides the first comprehensive examination of these issues for the undergraduate audience. Topics include personal identity and prudential rationality; personal identity's significance for moral responsibility and ethical theory; and the practical consequences of accounts of personal identity for issues such as abortion, stem cell research, cloning, advance directives, populations ethics, multiple personality disorder, and the definition of death. (shrink)

Recent developments in the field of neurosurgery, specifically those dealing with the modification of mood and affect as part of psychiatric disease, have led some researchers to discuss the ethical implications of surgery to alter personality and personal identity. As knowledge and technology advance, discussions of surgery to alter undesirable traits, or possibly the enhancement of normal traits, will play an increasingly larger role in the ethical literature. So far, identity and enhancement have yet to be explored (...) in a neurosurgical context, despite the fact that 1) neurological disease and treatment both potentially alter identity, and 2) that neurosurgeons will likely be the purveyors of future enhancement implantable technology. Here, we use interviews with neurosurgical patients to shed light on the ethical issues and challenges that surround identity and enhancement in neurosurgery. The results provide insight into how patients approach their identity prior to potentially identity-altering procedures and what future ethical challenges lay ahead for clinicians and researchers in the field of neurotherapeutics. (shrink)

Objections to uploading may be parsed into substrate issues, dealing with the computer platform of upload and personal identity. This paper argues that the personal identity issues of uploading are no more or less challenging than those of bodily transfer often discussed in the philosophical literature. It is argued that what is important in personal identity involves both token and type identity. While uploading does not preserve token identity, it does save type (...) identity; and even qua token, one may have good reason to think that the preservation of the type is worth the cost. (shrink)

One problem that has formed the focus of much recent discussion on personal identity is the Fission Problem. The aim of this paper is to offer a novel solution to this problem.

EMPIRICIST THEORIES OF PERSONAL IDENTITY STATE THAT THE IDENTITY OF A PERSON OVER TIME IS A MATTER OF BODILY CONTINUITY AND/OR SIMILARITY OF MEMORY AND CHARACTER. IN CONTRAST, THIS PAPER ARGUES THAT WHILE BODILY CONTINUITY AND SIMILARITY OF MEMORY AND CHARACTER ARE EVIDENCE OF PERSONAL IDENTITY, THEY DO NOT CONSTITUTE IT. IT IS SOMETHING UNDEFINABLE. THE DIFFICULTY OF KNOWING WHAT TO SAY IN PUZZLE CASES DOES NOT SHOW THAT PERSONAL IDENTITY EXISTS IN DIFFERENT (...) DEGREES OR THAT WE HAVE TO MAKE ARBITRARY JUDGMENTS ABOUT IT. IT SHOWS ONLY THAT SOMETIMES WE CANNOT KNOW WHO IS WHO. (shrink)

Most philosophers writing about personal identity in recent years claim that what it takes for us to persist through time is a matter of psychology. In this groundbreaking new book, Eric Olson argues that such approaches face daunting problems, and he defends in their place a radically non-psychological account of personal identity. He defines human beings as biological organisms, and claims that no psychological relation is either sufficient or necessary for an organism to persist. Olson rejects (...) several famous thought-experiments dealing with personal identity. He argues, instead, that one could survive the destruction of all of one's psychological contents and capabilities as long as the human organism remains alive--as long as its vital functions, such as breathing, circulation, and metabolism, continue. (shrink)

Historical introduction -- Human being -- Identity and human incompletion in Sartre -- Identity and human incompletion in Aquinas -- Human understanding -- The subjective nature of objective understanding in Sartre -- The subjective nature of objective understanding in Aquinas -- Human freedom -- Freedom, choice, and the indetermination of reason in Sartre -- Freedom, choice, and the indetermination of reason in Aquinas -- Human fulfillment -- The possibility of human happiness in Sartre -- The possibility of human (...) happiness in Aquinas. (shrink)

ABSTRACT: This essay examines and criticizes a set of Kantian objections to Parfit's attempt in Reasons and Persons to connect his theory of personal identity to practical rationality and moral philosophy. Several of Parfit's critics have tried to sever the link he forges between his metaphysical and practical conclusions by invoking the Kantian thought that even if we accept his metaphysical theory of personal identity, we still have good practical grounds for rejecting that theory when deliberating (...) about what to do. The argument between Parfit and his opponents illuminates broader questions about the relationship between our metaphysical beliefs and ourpractical reasons.RÉSUMÉ: Cet article examine et critique un ensemble d'objections kantiennes à la tentative de Parfit, dans Reasons and Persons, d'ajuster sa théorie de l'identité personnelle à la rationalité pratique et à la philosophie morale. Plusieurs des critiques de Parfit ont essayé de rompre le lien qu'il tisse entre ses conclusions métaphysiques et pratiques en évoquant l'idée kantienne selon -laquelle, même si nous acceptons sa théorie métaphysique de l'identité personnelle, il existe cependant de bonnes raisons pratiques de rejeter cette théorie lorsque nous délibérons à propos de ce que nous devons faire. Le débat entre Parfit et ses adversaires nous éclaire sur un questionnement plus large à propos du rapport entre croyance métaphysique et raison pratique. (shrink)

What happens to us when we die? According to Christian faith, we will rise again bodily from the dead. This claim raises a series of philosophical and theological conundrums: Is it rational to hope for life after death in bodily form? Will it truly be “we” who are raised again or will it be post-mortem duplicates of us? How can personal identity be secured? What is God's role in resurrection and everlasting life? In response to these conundrums, this (...) volume presents joint work of leading philosophers and theologians on life after death. So this volume is an impressive demonstration of interdisciplinary cooperation between philosophy and theology. Various models are offered which depict what resurrection into an incorruptible post-mortem body might look like. (shrink)

This book initiates a conversation between the two traditions showing how concepts and tools drawn from one philosophical tradition can help solve problems ...

Memory theories of personal identity are subject to the difficulty that distinct simultaneous person stages may both stand in the memory relation to an earlier person stage. Apparently, Such theories entail that these two duplicate person stages are stages of the same person, A claim argued to be "obviously false". In this paper, I argue that the characteristics of these duplication cases usually cited to support this claim do not provide adequate evidence to make it cogent.

In the recent neuroethics literature, there has been vigorous debate concerning the ethical implications of the use of neurotechnologies that may alter a person’s identity. Much of this debate has been framed around the concept of authenticity. The argument of this chapter is that the ethics of authenticity, as applied to neurotechnological treatment or enhancement, is conceptually misleading. The notion of authenticity is ambiguous between two distinct and conflicting conceptions: self-discovery and self-creation. The self-discovery conception of authenticity is based (...) on a problematic conception of a static, real inner self. The notion of self-creation, although more plausible, blurs the distinction between identity and autonomy. Moreover, both conceptions are overly individualistic and fail sufficiently to account for the relational constitution of personal identity. The authors propose that a relational, narrative understanding of identity and autonomy can incorporate the more plausible aspects of both interpretations of authenticity, while providing a normatively more illuminating theoretical framework for approaching the question of whether and how neurotechnologies threaten identity. (shrink)

Through careful analysis of a specific example, Parfit’s ‘fission argument’ for the unimportance of personal identity, I argue that our judgements concerning imaginary scenarios are likely to be unreliable when the scenarios involve disruptions of certain contingent correlations. Parfit’s argument depends on our hypothesizing away a number of facts which play a central role in our understanding and employment of the very concept under investigation; as a result, it fails to establish what Parfit claims, namely, that identity (...) is not what matters. I argue that Parfit’s conclusion can be blocked without denying that he has presented an imaginary case where prudential concern would be rational in the absence of identity. My analysis depends on the recognition that the features that explain or justify a relation may be distinct from the features that underpin it as necessary conditions. (shrink)

My topic is personal identity, or rather,ouridentity. There is general, but not, of course, unanimous, agreement that it is wrong to give an account of what is involved in, and essential to, our persistence over time which requires the existence of immaterial entities, but, it seems to me, there is no consensus about how, within, what might be called this naturalistic framework, we should best procede. This lack of consensus, no doubt, reflects the difficulty, which must strike anyone (...) who has considered the issue, of achieving, just in one's own thinking, a reflective equilibrium. The theory of personal identity, I feel, provides a curious contrast. On the one side, it seems highly important to know what sort of thing we are, but, on the other, it is hard to find any answer which has a ‘solid’ feel. (shrink)