Lockean accounts of personal identity face a problem of too many thinkers arising from their denial that we are identical to our animals and the assumption that our animals can think. Sydney Shoemaker has responded to this problem by arguing that it is a consequence of functionalism that only things with psychological persistence conditions can have mental properties, and thus that animals cannot think. I discuss Shoemaker’s argument and demonstrate two ways in which it fails. Functionalism does not rid the (...) Lockean of the problem of too many thinkers. (shrink)

In this paper, I attempt to map out the 'logical geography' of the territory in which issues of mental content and of personal identity meet. In particular, I investigate the possibility of combining a psychological criterion of personal identity with an externalist theory of content. I argue that this can be done, but only by accepting an assumption that has been widely accepted but barely argued for, namely that when someone switches linguistic communities, the contents of their thoughts do not (...) change immediately, but only after the person becomes integrated within the new linguistic community. I also suggest that recent work on personal identity, notably by Derek Parfit, has tacitly assumed internalism regarding mental content. I do not intend to argue for either externalism or a psychological criterion. My aim is merely to explicate the issues involved in making them compatible. (shrink)

In the large recent literature on the nature of human persons, persons are usually studied in isolation from the world in which they live. What persons are most fundamentally, philosophers say, are human animals, or brains, or perhaps souls -- without any consideration of the social and physical environments without which persons would not exist. In this article, I want to compensate for such overly narrow focus. Instead of beginning with the nature of persons cut off from any environment, I (...) shall begin with metaphysical consideration of the world of which persons are a part. I shall then briefly describe my view of persons, according to which persons are material objects like other concrete things in the world, but are unique in their first-person perspectives. Finally, I shall consider some of the special relations that persons, and only persons, have to other things in the world. (shrink)

In the large recent literature on the nature of human persons, persons are usually studied in isolation from the world in which they live. What persons are most fundamentally, philosophers say, are human animals, or brains, or perhaps souls—without any consideration of the social and physical environments without which persons would not exist. I confess that I, too, have been guilty at times of focusing narrowly on persons without regard to the world in which they live.

Eric Olson won the hearts of my graduate students by dedicating his book “to the unemployed philosophers.” (The students subsequently got fine jobs, but it’s the thought (or rather the sympathy) that counts.) As appreciated as the dedication was, however, I doubt that it was responsible for the wonderful reception that Olson’s book, The Human Animal, has had. Rather, the cleverness of his arguments, the vigor with which Olson writes, and the new interpretations of old thought experiments and arguments have (...) deservedly captured a great deal of philosophical attention in the past ten years. Despite the fact that I hold significantly different views from Olson’s, I am happy to be here today to help celebrate the tenth anniversary of his important book. (shrink)

According to the Constitution View of persons, a human person is wholly constituted by (but not identical to) a human organism. This view does justice both to our similarities to other animals and to our uniqueness. As a proponent of the Constitution View, I defend the thesis that the coming-into-existence of a human person is not simply a matter of the coming-into-existence of an organism, even if that organism ultimately comes to constitute a person. Marshalling some support from developmental psychology, (...) I give a broadly materialistic account of the coming-into-existence of a human person. I argue for the metaphysical superiority of the Constitution View to Biological Animalism, Thomistic Animalism, and other forms of Substance Dualism. I conclude by discussing the single implication of the Constitution View for thinking about abortion. Footnotesa Thanks to Gareth Matthews and Catherine E. Rudder for comments. I am also grateful to other contributors to this volume, especially Robert A. Wilson, Marya Schechtman, David Oderberg, Stephen Braude, and John Finnis. (shrink)

What is a human person, and what is the relation between a person and his or her body? In her third book on the philosophy of mind, Lynne Rudder Baker investigates what she terms the person/body problem and offers a detailed account of the relation between human persons and their bodies. Baker's argument is based on the 'Constitution View' of persons and bodies, which aims to show what distinguishes persons from all other beings and to show how we can be (...) fully material beings without being identical to our bodies. The Constitution View yields answers to the questions 'What am I most fundamentally?', 'What is a person?', and 'What is the relation between human persons and their bodies'? Baker argues that the complex mental property of first-person perspective enables one to conceive of one's body and mental states as one's own. (shrink)

Eric T. Olson has argued that any view of personal identity in terms of psychological continuity has a consequence that he considers untenable-namely, that he was never an early-term fetus. I have several replies. First, the psychological-continuity view of personal identity does not entail the putative consequence; the appearance to the contrary depends on not distinguishing between de re and de dicto theses. Second, the putative consequence is not untenable anyway; the appearance to the contrary depends on not taking seriously (...) an idea that underlies a plausible view of persons that I call `the Constitution View.' Finally, Olson's own "Biological View of personal identity" has liabilities of its own. (shrink)

Eric T. Olson has argued that any view of personal identity in terms of psychological continuity has a consequence that he considers untenable-namely, that he was never an early-term fetus. I have several replies. First, the psychological-continuity view of personal identity does not entail the putative consequence; the appearance to the contrary depends on not distinguishing between de re and de dicto theses. Second, the putative consequence is not untenable anyway; the appearance to the contrary depends on not taking seriously (...) an idea that underlies a plausible view of persons that I call `the Constitution View.' Finally, Olson's own "Biological View of personal identity" has liabilities of its own. (shrink)

The psychological continuity theory of personal identity has recently been accused of not meeting what is claimed to be a fundamental requirement on theories of identity - to explain personal moral responsibility. Although they often have much to say about responsibility, the charge is that they cannot say enough. I set out the background to the charge with a short discussion of Locke and the requirement to explain responsibility, then illustrate the accusation facing the theory with details from Marya Schechtman. (...) I aim some questions at the challengers’ reading of Locke, leading to an argument that the psychological continuity theory can say all that it needs to say about responsibility, and so is not in any grave predicament, at least not with regard to this particular charge. (shrink)

The view that an account of personal identity can be provided in terms of psychological continuity has come under fire from an interesting new angle in recent years. Critics from a variety of rival positions have argued that it cannot adequately explain what makes psychological states co-personal (i.e. the states of a single person). The suggestion is that there will inevitably be examples of states that it wrongly ascribes using only the causal connections available to it. In this paper, I (...) describe three distinct attacks on the psychological continuity theory along these lines. While I acknowledge that a number of interesting issues arise, I argue that the theory can withstand all three attacks. (shrink)

How does the concept of a person affect our beliefs about ourselves and the world? In an intriguing recent addition to his established Reductionist view of personal identity, Derek Parfit speculates that there could be beings who do not possess the concept of a person. Where we talk and think about persons, selves, subjects, or agents, they talk and think about sequences of thoughts and experiences related to a particular brain and body. Nevertheless their knowledge and experience of the world (...) is unaffected, in that it is largely like our own. It is their view of ‘themselves’ that is different (and superior) to ours. My paper critically assesses this ‘impersonal beings’ hypothesis through an examination of Parfit’s construal of the concept of a person. I argue that Parfit’s understanding of the concept of a person undermines his impersonal beings hypothesis. (shrink)

Has Derek Parfit modified his views on personal identity in light of Quassim Cassam’s neo-Kantian argument that to experience the world as objective, we must think of ourselves as enduring subjects of experience? Both parties suggest there is no longer a serious dispute between them. I retrace the path that led to this truce, and contend that the debate remains open. Parfit’s recent work reveals a re-formulation of his ostensibly abandoned claim that there could be impersonal descriptions of reality. I (...) show why Parfit still needs this claim, and how it conflicts with the neo-Kantian view. (shrink)

Most philosophers in the analytical philosophy answer the question what personal identity is in psychological terms. Arguments for substantiating this view are mainly based on thought experiments of brain transfer cases and the like in which persons change brains. However, in these thought experiments the remaining part of the body plays only a passive part. In this paper I argue that the psychological approach of personal identity cannot be maintained, if the whole body is actively involved in the analysis, and (...) that the body is an intrinsic part of what I am as a person. (shrink)

The view known as animalism asserts that we are human animals—that each of us is an instance of the Homo sapiens species. The standard argument for this view is known as the thinking animal argument . But this argument has recently come under attack. So, here, a new argument for animalism is introduced. The animal ancestors argument illustrates how the case for animalism can be seen to piggyback on the credibility of evolutionary theory. Two objections are then considered and answered.

Arguably the most significant development in the recent history of the personal identity debate has been the emergence of the view known as "animalism." This volume brings together original contributions on this topic written by both well-known and emerging philosophers. Contributors: Lynne Rudder Baker, Stephan Blatti, David Hershenov, Jens Johansson, Mark Johnston, Rory Madden, Jeff McMahan & Tim Campbell, Eric Olson, Derek Parfit, Mark Reid, Denis Robinson, David Shoemaker, Sydney Shoemaker, Paul Snowdon.

So-called “Wide Psychological Reductionism”, and similar neo-Lockean views of personal identity, are both important and popular. Yet they seem to demand of their adherents commitment to controversial views both in ontology and in philosophical methodology. The consequent debates interweave methodological, ontological, and evaluative issues in interesting ways. We will examine some of these issues, and explore some of the more recent developments and transformations which Psychological views have led to. The focus will be selective and we will look only at (...) a small selection from the prolific literature which has grown up around this topic. (shrink)

This paper considers the question whether a psychological approach to personal identity can be formulated within an endurantist, as opposed to four-dimensionalist, framework. Trenton Merricks has argued that this cannot be done. I argue to the contrary: a perfectly coherent endurantist version of the psychological approach can indeed be formulated.

ABSTRACT: We begin by discussing some logical constraints on the psychological approach to personal identity. We consider a problem for the psychological approach that arises in fission cases. The problem engenders the need for a non-branching clause in a psychological account of the co-personality relation. We look at some difficulties in formulating such a clause. We end by rejecting a recently proposed formulation of non-branching. Our criticism of the formulation raises some interesting questions about the individuation of person stages.RÉSUMÉ: Ce (...) travail traite d'abord de certaines contraintes logiques concernant l'usage de l'approche psychologique pour définir l'identité personnelle. Nous y examinons un problème touchant l'approche psychologique dans les cas de fission. Ce problème exige l'intervention d'une clause qui nie tout recours au branchement dans l'examen de la relation de co-personnalité. Nous avons rencontré certaines difficultés dans la formulation d'une teile clause. Pour conclure, nous rejetons uneformulation récente du non-branchement. Notre objection à cette formulation soulève quelques questions intéressantes concernant l'individuation de stades temporels personnels. (shrink)

In this paper we examine and critique the constitution view of the metaphysics of resurrection developed and defended by Lynne Rudder Baker. Baker identifies three conditions for an adequate metaphysics of resurrection. We argue that one of these, the identity condition, cannot be met on the constitution view given the account of personal identity it assumes. We discuss some problems with the constitution theory of personal identity Baker develops in her book, Persons and Bodies . We argue that these problems (...) render the constitution theory of personal identity as stated by Baker untenable. The upshot for the debate over the metaphysics of resurrection is that the constitution view of the metaphysics of resurrection must either be rejected or modified. (shrink)

Lynne Rudder Baker’s Constitution View of human persons has come under much recent scrutiny. Baker argues that each human person is constituted by, but not identical to, a human animal. Much of the critical discussion of Baker’s Constitution View has focused upon this aspect of her account. Less has been said about the positive diachronic account of personal identity offered by Baker. Baker argues that it is sameness of what she labels ‘first-person perspective’ that is essential to understanding personal identity (...) over time . Baker claims that her account avoids the commitment to indeterminacy of personal identity entailed by the psychological account. Further, the psychological account, but not her account, is plagued by what Baker labels the ‘duplication problem’. In the end, I argue that neither of these considerations forces us to renounce the psychological account and adopt Baker’s favored account. (shrink)

Bishop Butler objected to Locke's theory of personal identity on the grounds that memory presupposes personal identity. Most of those sympathetic with Locke's account have accepted Butler's criticism, and have sought to devise a theory of personal identity in the spirit of Locke's that avoids Butler's circularity objection. John McDowell has argued that even the more recent accounts of personal identity are vulnerable to the kind of objection Butler raised against Locke's own account. I criticize McDowell's stance, drawing on a (...) distinction introduced by Annalisa Coliva between two types of immunity to error through misidentification. (shrink)

Derek Parfit has offered numerous arguments in an attempt to establish that identity is not what matters. Jens Johannson has recently argued that Parfit's various arguments for the claim that identity is not what matters fail to establish what Parfit takes such arguments to establish. Johannson contends that this is due in part to the invalidity of one of Parfit's key arguments, and the fact that Parfit ignores a position that is compatible with the conclusions of his successful arguments and (...) the claim that identity is in fact what matters, namely, that I survive fission as either one of the fission products or the other, but it is indeterminate which one I survive as. I aim to establish here that both of Johannson's assertions are problematic. As a corollary of this task, I hope to shed some light on the relationship between indeterminacy and fission-based arguments for the claim that identity is not what matters. (shrink)

We begin by discussing some logical constraints on the psychological approach to personal identity. We consider a problem for the psychological approach that arises in fission cases. The problem engenders the need for a non-branching clause in a psychological account of the co-personality relation. We look at some difficulties in formulating such a clause. We end by rejecting a recently proposed formulation of non-branching. Our criticism of the formulation raises some interesting questions about the individuation of person stages.

Derek Parfit claims that all that rationally matters for a person is psychological connectedness or continuity, even without identity. A psychological replica of a person whose body is destroyed upon the replication rationally should be considered just as valuable as the original person. I argue against this, maintaining that any such copying procedure would be objectionable. First, I argue that a copy of an original person does not preserve identity to the original person. And second, I argue that because a (...) copy does not retain the identity of the orignial, it is not irrational to regard a copy as of less value than the original. (shrink)

It is argued that those who accept the psychological criterion of personal identity, such as Parfit and Shoemaker, should accept what I call the 'series' view of a person, according to which a person is a unified aggregate of mental events and states. As well as defending this view against objections, I argue that it allows the psychological theorist to avoid the two lives objection which the 'animalist' theorists have raised against it, an objection which causes great difficulties for the (...) conception of a person that most psychological theorists favour, the constitution view. It is also argued that the series view allows that people can body swap and teleport, which the constitution view—which takes a person to be a physical object (but a distinct physical object from the human being)—has great trouble with. (shrink)

I have argued elsewhere that the psychological criterion of personalidentity entails that a person is not an object, but a series ofpsychological events. As this is somewhat counter-intuitive,I consider whether the psychological theorist can argue that a person, while not a substance, exists in a way that is akin to theway that substances exist. I develop ten criteria that such a`quasi-substance' should meet, and I argue that a reasonablecase can be made to show that the psychological theorist's conception of a (...) person meets these criteria. (shrink)

Eric Olsen argues from the fact that we once existed as fetal individuals to the conclusion that the Standard View of personal identity in mistaken. I shall establish that a similar argument focusing upon dead people opposes Olson's favored Biological View of personal identity.

Sydney Shoemaker has claimed that functionalism, a theory about mental states, implies a certain theory about the identity over time of persons, the entities that have mental states. He also claims that persons can survive a "Brain-State-Transfer" procedure. My examination of these claims includes description and analysis of imaginary cases, but-notably-not appeals to our "intuitions" concerning them. It turns out that Shoemaker's basic insight is correct: there is a connection between the two theories. Specifically, functionalism implies that "non-branching functional continuity" (...) is sufficient for personal identity. But there is no implication that it is necessary. And the "BST" procedure may not preserve functional continuity. I consider several possibilities. On what may be the most attractive, the survivor of this-or any similar-procedure is not identical with the original person, but related to him or her as are the survivors in a case of fission. (shrink)

The Kinds of Things strongly supports the commonsense belief that in normal human life even changes in our deeply-held affections and ideals do not erode the ...

Theories of personal identity purport to specify truth conditions for sentences of the form 'x-at-ti is the same person as y-at-tj. Most philosophers nowadays agree that such truth conditions are to be stated in terms of psychological continuity. However; opinions vary as to how the notion of psychological continuity is to be understood. In a recent contribution to this journal, Slors offers an account in which psychological continuity is spelled out in terms of narrative connectedness between mental states.The present paper (...) argues that Slors' theory either is no theory of personal identity at all or is too weak.Towards the end of the paper, it is indicated how the problem uncovered for Slors' theory may be avoided. (shrink)

Abstract: Those who endorse the Psychological Continuity Approach (PCA) to analyzing personal identity need to impose a non-branching constraint to get the intuitively correct result that in the case of fission, one person becomes two. With the help of Brueckner's (2005) discussion, it is shown here that the sort of non-branching clause that allows proponents of PCA to provide sufficient conditions for being the same person actually runs contrary to the very spirit of their theory. The problem is first presented (...) in connection with perdurantist versions of PCA. The difficulty is then shown to apply to endurantist versions as well. -/- . (shrink)

Olson (1997a) tries to refute the Psychological Approach to personal identity with his Fetus Argument, and Mackie (1999) aims to do the same with the Death Argument. With the help of a suggestion made by Baker (1999), the following discussion shows that these arguments fail. In the process of defending the Psychological Approach, it is made clear exactly what one is and is not committed to as a proponent of the theory.

Tyler Burge has recently argued that quasi-memory-based psychological reductionist accounts of diachronic personal identity are deeply problematic. According to Burge, these accounts either fail to include appropriately de se elements or presuppose facts about diachronic personal identity—facts of the very kind that the accounts are supposed to explain. Neither of these objections is compelling. The first is based in confusion about the version of reductionism to which it putatively applies. The second loses its force when we recognize that reductionism is (...) a metaphysical thesis, not an epistemological one. (shrink)

One of the central problems of personal identity is to determine what we are essentially . In response to this problem, Lynne Rudder Baker espouses a psychological criterion, that is, she claims that persons are essentially psychological. Baker’s theory purports to bypass the problems of other psychological theories such as Dissociative Identity Disorder and the problem of individuating persons synchronically. I argue that the theory’s treatment of Dissociative Identity Disorder leads to untenable results, is invalid, and consequently fails to individuate (...) persons. (shrink)

John Locke’s account of personal identity is usually thought to have been proved false by Thomas Reid’s simple ‘Gallant Officer’ argument. Locke is traditionally interpreted as holding that your having memories of a past person’s thoughts or actions is necessary and sufficient for your being identical to that person. This paper argues that the traditional memory interpretation of Locke’s account is mistaken and defends a memory continuity view according to which a sequence of overlapping memories is necessary and sufficient for (...) personal identity. On this view Locke is not vulnerable to the Gallant Officer argument. (shrink)

This paper discusses the “constitution view” of human persons, as set forth by Lynne Rudder Baker in her book, Persons and Bodies. The metaphysical notion of constitution is explained and briefly defended. It is shown, however, that the view that human persons are constituted by their bodies faces difficulties in specifying the “person-favorable conditions” under which a human body constitutes a person. Furthermore, none of the arguments in support of the claim that humans are constituted by (but not identical with) (...) their bodies is persuasive. It is proposed that the mind-body theory of “emergent dualism” offers many of the benefits of the “constitution view” without sharing in its drawbacks. (shrink)

This paper discusses the “constitution view” of human persons, as set forth by Lynne Rudder Baker in her book, Persons and Bodies. The metaphysical notion of constitution is explained and briefly defended. It is shown, however, that the view that human persons are constituted by their bodies faces difficulties in specifying the “person-favorable conditions” under which a human body constitutes a person. Furthermore, none of the arguments in support of the claim that humans are constituted by (but not identical with) (...) their bodies is persuasive. It is proposed that the mind-body theory of “emergent dualism” offers many of the benefits of the “constitution view” without sharing in its drawbacks. (shrink)

Brain transplants and the dicephalus (an organism just like us except that it has two cerebrums) are thought to support the position that we are essentially thinking creatures, not living organisms. I try to offset the first of these intuitions by responding to thought experiments Peter Unger devised to show that identity is what matters. I then try to motivate an interpretation of the alleged conjoined twins as really just one person cut off from himself by relying upon what I (...) take will be the reader's disagreement with Locke's conjecture that a dreaming Socrates and an awake Socrates are two distinct people. (shrink)

Lockeans, as well as their critics, have pointed out that the memory criterion is likely to mean that none of us were ever fetuses or even infants due to the lack of direct psychological connections between then and now. But what has been overlooked is that the memory criterion leads to either backward causation and a violation of Locke’s own very plausible principle that we can have only one origin, or backward causation and a number of overlapping people where we (...) thought there was just one. I will argue that such problems cannot be avoided by replacing direct psychological connections with overlapping chains of connectedness—what has been called “psychological continuity.”. (shrink)

Defenders of the Psychological Approach to Personal Identity (PAPI) insist that the possession of some kind of mind is essential to us. We are essentially thinking beings, not living creatures. We would cease to exist if our capacity for thought was irreversibly lost due to a coma or permanent vegetative state. However, the onset of such conditions would not mean the death of an organism. It would survive in a mindless state. But this would appear to mean that before the (...) loss of cognition and the destruction of the person, the organism and the person were spatially coincident entities – two beings composed of the same matter at the same time and place. Perhaps the most problematic aspect of positing spatially coincident material entities is that it would seem to result in there being one too many thinkers. Since the person can obviously think, the organism should also have such a capacity as a result of possessing the same brain as well as every other atom of the person. This means that there now exist two thinking beings under the reader’s clothes! (shrink)

Scott Campbell has recently defended the psychological approach to personal identity over time by arguing that a person is literally a series of mental events. Rejecting four-dimensionalism about the persistence of physical objects, Campbell regards constitutionalism as the main rival version of the psychological approach. He argues that his "series view" has two clear advantages over constitutionalism: it avoids the "two thinkers" objection and it allows a person to change bodies. In addition, Campbell suggests a reply to the objection, often (...) raised against views such as his, that thoughts must be distinct from their thinker. In this paper, I argue that Campbell's responses to the "two thinkers" and the "thoughts/thinker" objections are unsuccessful. Furthermore, his reply to the latter leads to four-dimensionalism of the kind he wanted to avoid – and this view too allows a person to change bodies. Moreover, I argue that it speaks against the series view that generalised versions of it fare much more poorly than do generalised versions of constitutionalism and four-dimensionalism. (shrink)

Most versions of the psychological-continuity approach to personal identity (PCA) contain a 'non-branching' requirement. Recently, Robert Francescotti has argued that while such versions of PCA handle Parfit's standard fission case well, they deliver the wrong result in the case of an intact human brain. To solve this problem, he says, PCA-adherents need to add a clause that runs contrary to the spirit of their theory. In this response, I argue that Francescotti's counterexample fails. As a result, the revision he suggests (...) is not needed. (shrink)

The so-called 'Extreme Claim' asserts that reductionism about personal identity leaves each of us with no reason to be specially concerned about his or her own future. Both advocates and opponents of the Extreme Claim, whether of a reductionist or non-reductionist stripe, accept that similar problems do not arise for non-reductionism. In this paper I challenge this widely held assumption.

Deep brain stimulation (DBS) is a well-accepted treatment for movement disorders and is currently explored as a treatment option for various neurological and psychiatric disorders. Several case studies suggest that DBS may, in some patients, influence mental states critical to personality to such an extent that it affects an individual’s personal identity, i.e. the experience of psychological continuity, of persisting through time as the same person. Without questioning the usefulness of DBS as a treatment option for various serious and treatment (...) refractory conditions, the potential of disruptions of psychological continuity raises a number of ethical and legal questions. An important question is that of legal responsibility if DBS induced changes in a patient’s personality result in damage caused by undesirable or even deviant behavior. Disruptions in psychological continuity can in some cases also have an effect on an individual’s mental competence. This capacity is necessary in order to obtain informed consent to start, continue or stop treatment, and it is therefore not only important from an ethical point of view but also has legal consequences. Taking the existing literature and the Dutch legal system as a starting point, the present paper discusses the implications of DBS induced disruptions in psychological continuity for a patient’s responsibility for action and competence of decision and raises a number of questions that need further research. (shrink)

Sydney Shoemaker leads today’s “neo-Lockean” liberation of persons from the conservative animalist charge of “neo-Aristotelians” such as Eric Olson, according to whom persons are biological entities and who challenge all neo-Lockean views on grounds that abstracting from strictly physical, or bodily, criteria plays fast and loose with our identities. There is a fundamental mistake on both sides: a false dichotomy between bodily continuity versus psychological continuity theories of personal identity. Neo-Lockeans, like everyone else today who relies on Locke’s analysis of (...) personal identity, including Derek Parfit, have either completely distorted or not understood Locke’s actual view. Shoemaker’s defense, which uses a “package deal” definition that relies on internal relations of synchronic and diachronic unity and employs the Ramsey–Lewis account to define personal identity, leaves far less room for psychological continuity views than for my own view, which, independently of its radical implications, is that (a) consciousness makes personal identity, and (b) in consciousness alone personal identity consists—which happens to be also Locke’s actual view. Moreover, the ubiquitous Fregean conception of borders and the so-called “ambiguity of is” collapse in the light of what Hintikka has called the “Frege trichotomy.” The Ramsey–Lewis account, due to the problematic way Shoemaker tries to bind the variables, makes it impossible for the neo-Lockean ala Shoemaker to fulfill the uniqueness clause required by all such Lewis style definitions; such attempts avoid circularity only at the expense of mistaking isomorphism with identity. Contrary to what virtually all philosophers writing on the topic assume, fission does not destroy personal identity. A proper analysis of public versus perspectival identification, derived using actual case studies from neuropsychiatry, provides the scientific, mathematical and logical frameworks for a new theory of self-reference, wherein “consciousness,” “self-consciousness,” and the “I,” can be precisely defined in terms of the subject and the subject-in-itself. (shrink)

The book also includes a chronological table of significant events, select bibliography, succinct explanatory notes, and an index--all of which supply ...

If persons endure, personal identity cannot be analyzed in terms of psychological continuity. That is one conclusion defended in my "Endurance, Psychological Continuity, and the Importance of Personal Identity" (PPR, 1999). Rea and Silver (PPR, 2000) claim that my argument for that conclusion is sound only if a parallel argument is sound. The parallel argument concludes that if persons perdure, personal identity cannot be analyzed in terms of psychological continuity. In this paper, I show that Rea and Silver are mistaken. (...) My argument is sound but the parallel argument is not. (shrink)

The paper presents considerations that weigh against one or another version of the psychological continuity theory of personal identity over time. Such Locke-like theories frequently go wrong, it is argued, in not formulating precisely how the psychological states of an individual person are related diachronically, in failing to capture a truly appropriate causal connection between later and earlier psychological states, and in claiming support from particular cases. In addition, the paper offers examples and other considerations that support an alternative, biological (...) continuity theory according to which you and I are each identical with a human organism. (shrink)

"Quasi-memories," necessarily presupposing a distinction between an "experiencing" and a "remembering" person, are considered by Parfit and Shoemaker as necessary and/or sufficient criteria for personal identity. However, the concept of "q-memories" is rejected by Schechtman since, according to her, neither "content" and "experience" can be separated from each other in "q-memories" ("principal inseparability") nor can they be distinguished from delusions/confabulations ("principal indistinguishability"). The purpose of the present paper is to demonstrate that, relying on a neurophilosophical approach, both arguments can be (...) rejected. Neuropsychological research shows that "contents" of memories are classified according to the accompanying psychological state such that the same "content" can be classified either as auto- or heterobiographical by the respective "experience." Since "content" and "experience" can be separated from each other, the argument of "principal inseparability" must be rejected on empirical grounds. In addition, as demonstrated in an example of a schizophrenic patient, "q-memories" can be distinguished from delusions/confabulations considering the ability to distinguish between different sources of autobiographical memories as a differential criterion. In conclusion, both arguments by Schechtman against the concept of "q-memories" have to be rejected on the basis of neurophilosophical considerations. Consequently, the concept of "q-memories" can be considered as compatible with current empirical knowledge. (shrink)

Sydney Shoemaker argues that the functionalist theory of mind entails a psychological-continuity view of personal identity, as well as providing a defense of that view against a crucial objection. I show that his view has surprising consequences, e.g. that no organism could have mental properties and that a thing's mental properties fail to supervene even weakly on its microstructure and surroundings. I then argue that the view founders on "fission" cases and rules out our being material things. Functionalism tells us (...) little if anything about personal identity. (shrink)

In "Was I Ever a Fetus?" I argued that, since each of us was once an unthinking fetus, psychological continuity cannot be necessary for us to persist through time. Baker claims that the argument is invalid, and that both the premise and the conclusion are false. I attempt to defend argument, premise, and conclusion against her objections.

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 ...

In a recent article, Trenton Mericks argues that psychological continuity analyses (PC-analyses) of personal identity over time are incompatible with endurantism. We contend that if Merricks's argument is valid, a parallel argument establishes that PC-analyses of personal identity are incompatible with perdurantism; hence, the correct conclusion to draw is simply that such analyses are all necessarily false. However, we also show that there is good reason to doubt that Merricks's argument is valid.

Contra Derek Parfit’s psychological continuity theory, I argue for an externalist conception of what matters in the survival of persons over time. Specifically, I claim that what matters in the survival of persons is the continuation of what I call their “life trajectories.” This condition on the quasi-continuation of the diachronic identity of persons comes from considering the implications of what certain kinds of cases of “complete virtual immersion”-- the immersion of a psychological subject in a completely virtual world, a (...) world in which experiences are de-correlated with events in the objective world. This hypothesis results in some fairly strong conditions on the synchronic identity of persons, conditions that demonstrate that psychological continuity over time is insufficient for having what matters in survival. Of course, the idea that externalist constraints are important in a complete account of what is metaphysically necessary for maintaining persons and what matters in their survival is not new, but I propose my own specific theory about how to understand these constraints. What’s more, I explain in detail why incorporating externalist constraints in an account of what matters in survival proves to rule out fission as a case in which we have what matters equally as much as we do in single case, and unlike the traditional way of rejecting these cases, I do so without requiring a commitment to an identity theory of what matters. The view I offer can also explain our reactions to different virtual immersion scenarios. Therefore, simply on explanatory grounds alone, my view is to be preferred over pure psychological continuity theories. (shrink)

This paper concerns the relationships between persons, brains, behaviour, and psychological explanation. Tye defines a ‘psychological framework’ (PF) as a set of token beliefs, desires, intentions, memories, streams of consciousness, higher-order mental states, etc., that ‘form a coherent whole’ and against which a creature’s ‘behavior can be explained’ (p. 141). A person is the subject of such a psychological framework. Each person has one PF, and with each new PF there is a new person. Meanwhile materialism tells us, according to (...) Tye, that brains are the bearers of mental states. In other words, ‘each person is a brain’ (p. 142) — or rather a ‘global physical state of the brain,’ since Tye believes that a single brain might realize multiple PFs and thus constitute multiple persons. Most of this paper simply assumes Tye’s account of personal identity, in order to expose certain contradictions within what Tye says about personhood in split-brain subjects. Towards the end of the paper, however, I turn to alternative accounts of persons. While a method of individuating persons grounded in scientific psychology would identify persons with psychological frameworks, as Tye does, perhaps an account of personhood grounded either in a non-psychological science, or in non-scientific psychology, would better fit the interests we have in personal identity. (shrink)

Psychologically based accounts of personal identity over time start from a view of persons as experiencing subjects. Derek Parfit argues that if such an account is to justify the importance we attach to identity it will need to provide a deep unity of consciousness throughout the life of a person, and no such unity is possible. In response, many philosophers have switched to a view of persons as essentially agents, arguing that the importance of identity depends upon agential unity rather (...) than unity of consciousness. While this shift contributes significantly to the discussion, it does not offer a fully satisfying alternative. Unity of consciousness still seems required if identity is to be as important as we think it is. Views of identity based on agential unity do, however, point to a new understanding of unity of consciousness which meets Parfit's challenge, yielding an integrated view of identity which sees persons as both subjects and agents. Footnotesa I am indebted to many friends and colleagues for their input in the course of writing this essay. I would like especially to thank David DeGrazia, Anthony Laden, Ray Martin, Marc Slors, and the editors of Social Philosophy and Policy. (shrink)

Philosophical discussions of personal identity depend upon thought experiments which describe psychological vicissitudes and question whether the original person survives in the person resulting from the described change. These cases are meant to determine the types of psychological change compatible with personal continuation. Two main accounts of identity try to capture this distinction; psychological continuity theories and narrative theories. I argue that neither fully succeeds since both overlook the importance of a relationship I call “empathic access.” I define empathic access (...) and discuss its role in a complete account of personal identity. (shrink)