Puzzle Cases in Personal Identity, Misc

The core of a Trinitarian model is the internal layout of intra-Trinitarian relations. Depending on different metaphysical interpretations of the nature of the relations, various patristic authors have produced different and oftentimes incompatible Trinitarian models, and, consequently, conflicting expositions of the doctrine of the Trinity. In order to elucidate the differences in their Trinitarian theologies, I demonstrate the divergence in their understanding of the divine relations using the contemporary philosophical taxonomy of relations. I analyze the models of Basil of Caesarea, (...) Gregory Nazianzen, and Boethius, and their attempted synthesis by Thomas Aquinas. Each of the patristic Trinitarian models, in spite of being fully orthodox, uses completely different types of relations, which makes them incompatible. One of the results of this incompatibility is the problem of the filioque, which cannot be resolved without addressing the metaphysics of relations. (shrink)

This paper is primarily about metaphysics; specifically, about a Cartesian view of the self, according to which it is a simple, enduring, non-material entity.I take a critical look at Nida-Rümelin’s novel conceptual arguments for this view and argue that they don’t give us decisive reasons to uphold the Cartesian view. But in Nida-Rümelin’s view, what is at stake in these arguments is not merely theoretical: the truth – and our beliefs about it – has practical consequences as well. In her (...) view, if the Cartesian simple view of the self were false, we would have no reason to love and care for family and friends, and our special interest in our own future would be pointless. In the last section of this paper, I will say something about the sense in which it is right and the sense in which it is wrong to think that the metaphysics of the self has broader relevance for our lives. (shrink)

This book discusses the philosophical work of Décio Krause. Non-individuality, as a new metaphysical category, was thought to be strongly supported by quantum mechanics. No one did more to promote this idea than the Brazilian philosopher Décio Krause, whose works on the metaphysics and logic of non-individuality are now widely regarded as part of the consolidated literature on the subject. This volume brings together chapters elaborating on the ideas put forward and defended by Krause, developing them in many different directions, (...) commenting on aspects not completely developed so far, and, more importantly, critically addressing their current formulations and defenses by Krause himself. Given that Krause’s ideas do connect directly and indirectly with a wide array of subjects, such as the philosophy of quantum mechanics, more broadly understood, the philosophy of logic and logical philosophy, non-classical logics, metaphysics, and ontology, this volume contains important material for the research on logic and foundations of science, broadly understood. All the invited contributors have already worked with the ideas developed by Décio (some of them still work with them), being also distinct authors and extremely relevant in their areas of expertise. The volume is aimed at philosophers, including those of physics and quantum mechanics. (shrink)

The following seems to be a truism in modern day philosophy: No agent can have had other parents (IDENTITY). IDENTITY shows up in discussions of moral luck, parenting, gene editing, and population ethics. In this paper, I challenge IDENTITY. I do so by showing that the most plausible arguments that can be made in favor of IDENTITY do not withstand critical scrutiny. The paper is divided into four sections. In the first, I document the prevalence of IDENTITY. In the second, (...) I examine a defense of IDENTITY on the basis of genetic considerations. In the third, I examine a defense of IDENTITY that I call gamete essentialism. In the fourth, I return to genetic considerations to wrap up the paper. (shrink)

The view that it is possible for someone to think at a time without existing at that time is not only perfectly coherent but in harmony with an attractive externalist view of the mental. Furthermore, it offers plausible solutions to various puzzles of personal identity.

This paper introduces three new criteria that a theory of personal identity ought to satisfy: (1) material holism, (2) narrative unity, and (3) narrative integrity. Material holism guards against the undesirable consequence of positing the person as part and existentially distinct from the organismal whole, of which it is dependent and interconnected. Narrative unity ensures that continuity between the beginning, middle, and end of a human life is sufficiently accounted for. Narrative integrity secures fidelity and congruence between each part and (...) the whole, the whole to each part. Jeff McMahan’s Embodied Mind Account (EM) fails to satisfy each of these. On McMahan’s account, human persons and human organisms are distinct entities, human persons come into existence after its human organism, and human persons may go out of existence before their human organism. Moreover, fetuses, infants, the congenitally severely cognitively impaired, those with severe dementia, and the comatose are non-persons. A theory of personal identity that incorporates holism and narrative can provide a better explanation of human existence, life and death, and the identity paradox of dicephalic twins. If accepted, EM must either be rejected or ameliorated, and the new criteria ought to be incorporated in contemporary research of personal identity. (shrink)

Good physical experiments conform to the basic methodological standards of experimental design: they are objective, reliable, and valid. But is this also true of thought experiments? Especially problems of personal identity have engendered hypothetical scenarios that are very distant from the actual world. These imagined situations have been conspicuously ineffective at resolving conflicting intuitions and deciding between the different accounts of personal identity. Using prominent examples from the literature, I argue that this is due to many of these thought experiments (...) not adhering to the methodological standards that guide experimental design in nearly all other disciplines. I also show how empirically unwarranted background assumptions about human physiology render some of the hypothetical scenarios that are employed in the debate about personal identity highly misleading. (shrink)

The idea that physical death may not mark the end of an individual's existence has long been a source of fascination. It is perhaps unsurprising that we are apt to wonder what it is that happens to us when we die. Is death the end of me and all the experiences that count as mine? Or might I exist, and indeed have experiences, beyond the time of my death? And yet, deep metaphysical puzzles arise at the very suggestion that persons (...) might continue to exist following physical death. Indeed, whether, and how, one can exist post-mortem will depend in no small part on what sorts of things we are and on what it takes for things like us to persist across temporal durations and other changes. These topics and their application to the growing collection of materialist accounts of resurrection are the focus of this Element. (shrink)

This article deals with an argument reported by Razi (d. 1210) that attempted to undermine the immaterialist position about human nature. After some introductory remarks and explanation of the conceptual background, the article analyses the structure of the argument, with special attention to the idea of soul-switching.’ Some comparisons are made between the argument reported by Razi and a number of arguments from modern and contemporary eras of philosophy. One section is devoted to the critique of the argument and its (...) conceptual basis. This article shows that the argument reported by Razi is a methodological antecedent of a family of contemporary epistemological arguments against substance dualism. It is also shown that discussion of the argument could be useful to highlight a weakness in some, but not all, versions of immaterialism about human nature. (shrink)

En este ensayo, evaluaremos el problema de la identidad personal en el contexto del transhumanismo. En primer lugar, en contra de la tesis de que el transhumanismo representa una amenaza a la persistencia de la identidad personal argumentaremos lo siguiente: los individuos humanos que son personas no tienen características esenciales. En segundo lugar, con la ayuda del primer episodio de la segunda temporada de la serie de ciencia ficción Black Mirror, defenderemos la tesis de que hay propiedades que realmente importan (...) en el problema de la identidad personal: las propiedades relacionales(esta tesis tiene como consecuencia que nuestros seres queridos son irremplazables, incluso por duplicados exactos). Finalmente, concluiremos que el uso de las tecnologías de mejoramiento humano no representa una amenaza a la identidad personal de un individuo en tanto que no altera sus propiedades relacionales importantes. (shrink)

When we think about ethics, we normally focus on a particular sort of agent: the individual person. Some philosophers have argued that we should rethink the limits of what counts as an ethically relevant unit of agency by expanding outward, and claiming that groups of people can have normative reasons for action. In this paper, I explore whether we can go in the other direction. Are there sub‐personal beings who count as agents with their own reasons for action? In particular, (...) might the temporal parts of persons, beings like “me‐in‐my‐twenties,” be thought of as normative agents? This idea, I argue, has deep attractions, and deep, but surmountable, challenges. And if we do accept this idea, I argue, this can indirectly help to support the case for thinking that groups can have reasons for action. (shrink)

Given reductionism about people, personal persistence must fundamentally consist in some kind of impersonal continuity relation. Typically, these continuity relations can hold from one to many. And, if they can, the analysis of personal persistence must include a non-branching clause to avoid non-transitive identities or multiple occupancy. It is far from obvious, however, what form this clause should take. This paper argues that previous accounts are inadequate and develops a new proposal.

abstractBy appealing to the similarity between pre-vital and post-mortem nonexistence, Lucretius famously tried to show that our anxiety about death was irrational. His so-called Symmetry Argument has been attacked in various ways, but all of these strategies are themselves problematic. In this paper, I propose a new approach to undermining the argument: when Parfit’s distinction between identity and what matters is applied, not diachronically but across possible worlds, the alleged symmetry can be broken. Although the pre-vital and posthumous time spans (...) that we could have experienced are indeed analogous with respect to our identity, they are not analogous with respect to psychological continuity, which forms the basis of prudential concern. Lucretius even anticipated the Parfitian distinction. He did not, however, notice the significance that it has for his Symmetry Argument. (shrink)

There is recent empirical evidence that personal identity is constituted by one’s moral traits. If true, this poses a problem for those who advocate for moral enhancement, or the manipulation of a person’s moral traits through pharmaceutical or other biological means. Specifically, if moral enhancement manipulates a person’s moral traits, and those moral traits constitute personal identity, then it is possible that moral enhancement could alter a person’s identity. I go a step further and argue that under the right conditions, (...) moral enhancement can constitute murder. I then argue that these conditions are not remote. (shrink)

According to the Psychological Account of personal identity, personal identity across time is maintained by some form of psychological overlap or continuance. I show that the Psychological Account has trouble accommodating cases of transient retrograde amnesia. In such cases, the transitivity of psychological continuity may break down. I consider various means of responding to this problem, arguing that the best available response will undercut our ability to rely on intuitions about brain transplantation to support the Psychological Account. When the Psychological (...) Account is re-interpreted in such a way as to overcome the problems posed by cases of transient retrograde amnesia, it turns out that standard brain transplantation cases involve details which are strictly irrelevant according to the theory. On the other hand, these features seem to drive our intuitions about survival in these cases. In this way, my argument undermines one of the key motivations for adopting the Psychological Account. (shrink)

Are grounding claims fully general in character? If an object a is F in virtue of being G, does it follow that anything that’s G is F for that reason? According to the thesis of Weak Formality, the answer here is ‘yes’. In this paper, however, I argue that there is philosophical utility in rejecting this thesis. More exactly, I argue that two currently unresolved problems in contemporary metaphysics can be dealt with if we hold that there can be cases (...) of ‘kind-dependent grounding’, the key thought being that once we allow for such cases, we must also accept that Weak Formality is false. (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)

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)

A short story exploring cloning and the Teletransporter Thought Experiment. Rather than abstract consideration, the focus is on the first-personal experience.

In his stimulating recent book Reasons without Persons, Brian Hedden develops a novel theory of rationality that he calls Time-Slice Rationality. One of the main theses of TSR is that all rational requirements are synchronic. We argue here first that this thesis is not well-motivated. We also demonstrate that Hedden is in fact committed to an even stronger claim about the rationality of an agent at a time. Finally, we provide some arguments against the conception of rationality that results from (...) this stronger claim. (shrink)

Plausible assumptions from Cosmology and Statistical Mechanics entail that it is overwhelmingly likely that there will be exact duplicates of us in the distant future long after our deaths. Call such persons “Boltzmann duplicates,” after the great pioneer of Statistical Mechanics. In this paper, I argue that if survival of death is possible at all, then we almost surely will survive our deaths because there almost surely will be Boltzmann duplicates of us in the distant future that stand in appropriate (...) relations to us to guarantee our survival. (shrink)

Paul Ricoeur and Marya Schechtman express grave doubts about the acceptability and informativeness of the thought-experiments employed by analytic philosophers (notably Derek Parfit) in the debate about personal identity, and for what appear to be related reasons. I consider their reasoning and argue that their reasons fail to justify their doubts. I go on to argue that, from this discussion of possible problems concerning select thought-experiments, something positive can be learned about personal identity.

Nils-Frederic Wagner takes issue with my argument that influential critics of “transplant” thought experiments make two cardinal mistakes. He responds that the mistakes I identify are not mistakes at all. The mistakes are rather on my part, in that I have not taken into account the conceptual genesis of personhood, that my view of thought experiments is idiosyncratic and possibly self-defeating, and in that I have ignored important empirical evidence about the relationship between brains and minds. I argue that my (...) case still stands and that transplant thought experiments can do damage to rivals of a psychological continuity theory of personal identity like Marya Schechtman’s Person Life View. (shrink)

I develop an argument that believing in the survivability of a mind uploading procedure conveys value to its believers that is assessable independently of assessing the truth of the belief. Regardless of whether the first-order metaphysical belief is true, believing it conveys a kind of Darwinian fitness to the believer. Of course, a further question remains of whether having that Darwinian property can be a basis—in a rational sense of being a basis—for one’s holding the belief. I’ll also make some (...) remarks in the present article toward answering that latter question. (shrink)

I respond to David Shoemaker's arguments for the conclusion that personal identity is irrelevant for death. I contend that we can accept Shoemaker's claim that loss of personal identity is not sufficient for death while nonetheless maintaining that there is an important theoretical relationship between death and personal identity. I argue that this relationship is also of practical importance for physicians' decisions about organ reallocation.

According to conventionalist accounts of personal identity, persons are constituted in part by practices and attitudes of certain sorts of care. In this paper, we concentrate on the most well-developed and defended version of conventionalism currently on offer (namely, that proposed by David Braddon-Mitchell, Caroline West, and Kristie Miller) and discuss how the conventionalist appears forced either (1) to accept arbitrariness concerning from which perspective to judge one's survival or (2) to maintain egalitarianism at the cost of making “transfiguring” decisions (...) such as Pascal's Wager rationally intractable. We consider three ways the egalitarian conventionalist could make these choices tractable and show that each one comes at significant cost to the view. We end the paper by considering whether accepting arbitrariness would be a better move for the conventionalist and conclude that, even here, she runs the risk of transfiguring choices being rationally intractable. (shrink)

‘Transplant’ thought-experiments, in which the cerebrum is moved from one body to another, have featured in a number of recent discussions in the personal identity literature. Once taken as offering confirmation of some form of psychological continuity theory of identity, arguments from Marya Schechtman and Kathleen Wilkes have contended that this is not the case. Any such apparent support is due to a lack of detail in their description or a reliance on predictions that we are in no position to (...) make. I argue that the case against them rests on two serious misunderstandings of the operation of thought-experiments, and that even if they do not ultimately support a psychological continuity theory, they do major damage to that theory’s opponents. (shrink)

Aquinas’s account of the human soul is the key to his theory of human nature. The soul’s nature as the substantial form of the human body appears at times to be in tension with its nature as immaterial intellect, however, and nowhere is this tension more evident than in Aquinas’s discussion of the ‘separated’ soul. In this paper I use the Biblical story of the rich man and Lazarus (which Aquinas took to involve actual separated souls) to highlight what I (...) will call the Two-Person Problem facing his account of human identity through death and the bodily resurrection. Aquinas claims that the rational soul is neither the human being nor the human person. When the rich man’s soul says “I am in agony,” then, what is the referent of “I?” It appears that there is a human person, ‘Dives,’ who is replaced at Dives’s death by the person ‘Dives’s soul,’ who is in turn replaced at the bodily resurrection by ‘Dives,’ whom Aquinas claims is numerically identical to the original person. But this seems hopeless as an identity-preserving account of human nature. I believe that Aquinas’s account of human nature does not, as it stands, possess the resources with which to overcome this difficulty; I conclude that reconstructing a(n otherwise) Thomistic account that involves immediate bodily resurrection, although a radical approach, is the one best suited to preserving the most essential features of Aquinas’s theory. (shrink)

Psychological Sequentialism holds that no causal constraint is necessary for the preservation of what matters in survival; rather, it is sufficient for preservation if two groups of mental states are similar enough and temporally close enough. Suppose that one’s body is instantaneously dematerialized and subsequently, by an amazing coincidence, a collection of molecules is configured to form a qualitatively identical human body. According to Psychological Sequentialism, these events preserve what matters in survival. In this article, I examine some of the (...) main arguments for the view and argue that they fail to establish that no causal constraint is necessary. I also argue that Psychological Sequentialism yields implausible consequences that render it hard to accept the view. (shrink)

Gregor Samsa awakes to find himself transformed into a gigantic bug. The creature’s inchoate flailing leads Gregor’s sister to conclude that Gregor is no more, having been replaced by a brute beast lacking any vestige of human understanding. Sadly, real cases of brain injury and disease can lead to psychological metamorphoses so profound that we cannot easily think that the survivor is the person we knew. I argue that there can be cases in which statements like, “It’s just not Gregor (...) anymore,” are not merely figures of speech. With this in mind, I consider three possible results of saving a biological life: (1) ordinary cases where saving the life will save the person, with strong duties to save the life; (2) cases where the intervention needed to save the life will replace the person, with strong duties not to save the life; (3) cases in which it is indeterminate whether the person will be saved or replaced. How should we think about indeterminate cases? Impersonal ethical considerations miss the point, while standard person-affecting considerations are inapplicable. I suggest turning attention away from survival towards a richer focus on what I call “personal concern.” I show how considerations of personal concern, unlike those of self-interest, need not be tied to survival and how this allows personal concern to provide a basis for ethically substantive discussion of cases where saving a life might result in losing the patient. (shrink)

(ENGLISH) In this paper I propose a concept of the self that allows us to address and solve some of the issues associated with problem of diachronic personal identity. That is, by virtue of what can we consider that I am today the same person I was yesterday? The problem of continuity in time of identity has a long history in analytic philosophy. I argue that the continuity of personal identity over time can be ensured by resorting to the concept (...) of "extended self as the center of gravity" presented here. My central argument is that a person does not know and is not in control of her personal identity. Identities are not dependent on particular individuals, but always extend outward toward others. Therefore, the continuity of my identity is guaranteed by the others. ------------- -/- (SPANISH) En este trabajo propongo un concepto del Yo que nos permite abordar y solucionar algunos de los problemas asociados con la identidad personal diacrónica. Esto es, en virtud de qué podemos considerar que hoy yo soy la misma persona que fui ayer. Este problema de la continuidad en el tiempo de la identidad personal tiene una larga historia en la filosofía analítica. Yo sostengo que la continuidad de la identidad personal en el tiempo se puede garantizar acudiendo al concepto del “yo extendido como centro de gravedad” que aquí presento. Mi argumento central es que una persona individual no conoce ni está en control de su identidad ya que las identidades no dependen de los individuos particulares, sino que siempre se extienden hacia fuera, hacia los otros. Es decir, la continuidad de mi identidad está garantizada por los otros. (shrink)

This paper addresses several questions related to the nature, production, and use of animal-human (a-h) chimeras. At the heart of the issue is whether certain types of a-h chimeras should be brought into existence, and, if they are, how we should treat such creatures. In our current research environment, we recognize a dichotomy between research involving nonhuman animal subjects and research involving human subjects, and the classification of a research protocol into one of these categories will trigger different ethical standards (...) as to the moral permissibility of the research in question. Are a-h chimeras entitled to the more restrictive and protective ethical standards applied to human research subjects? We elucidate an Aristotelian-Thomistic metaphysical framework in which to argue how such chimeras ought to be defined ontologically. We then examine when the creation of, and experimentation upon, certain types of a-h chimeras may be morally permissible. (shrink)

The rare condition known as dicephalus occurs when (prior to implantation) a zygote fails to divide completely, resulting in twins who are conjoined below the neck. Human dicephalic twins look like a two-headed person, with each brain supporting a distinct mental life. Jeff McMahan has recently argued that, because they instance two of us but only one animal, dicephalic twins provide a counterexample to the animalist's claim that each of us is identical with a human animal. To the contrary, I (...) argue that in cases of dicephalus it is obvious neither that there is one animal nor that there are two of us. Consequently, the animalist criterion does not straightforwardly apply to cases of dicephalus. I defend an account of dicephalus that is both sensitive to the complexity of twinning phenomena and not inconsistent with animalism. In my view, dicephalic twins are a borderline case of the concept HUMAN ANIMAL. I conclude with some speculative remarks concerning the normative import (if any) of my claim that dicephalic twins are a borderline case. (shrink)

Philosophers have traditionally used thought-experiments in their endeavours to find a satisfactory account of the self and personal identity. Yet there are considerations from empirical psychology as well as related ones from philosophy itself that appear to completely undermine the method of thought-experiment. This paper focuses on both sets of considerations and attempts a defence of the method.

Derek Parfit's combined-spectrum argument seems to conflict with epistemicism, a viable theory of vagueness. While Parfit argues for the indeterminacy of personhood, epistemicism denies indeterminacy. But, we argue, the linguistically based determinacy that epistemicism supports lacks the sort of normative or ontological significance that concerns Parfit. Thus, we reformulate his argument to make it consistent with epistemicism. We also dispute Roy Sorensen's suggestion that Parfit's argument relies on an assumption that fuels resistance to epistemicism, namely, that 'the magnitude of a (...) modification must be proportional to its effect.'. (shrink)

This is a critical review of Raymond Martin's 'Self-Concern' (1998), focusing especially on his criticism of Parfit's use of fission thought-experiments and his own 'fission rejuvenation' thought-experiment.

Both arguments are based on the breakdown of normal criteria of identity in certain science-fictional circumstances. In one case, normal criteria would support the identity of person A with each of two other persons, B and C; and it is argued that, in the imagined circumstances, A=B and A=C have no truth value. In the other, a series or spectrum of cases is tailored to a sorites argument. At one end of the spectrum, persons A and B are such that (...) A=B is clearly true; at the other end, A and B are such that the identity is clearly false. In between, normal criteria of identity leave the truth or falsehood of A=B undecided, and it is argued that in these circumstances A=B has no truth value.These arguments are to be understood counterfactually. My claim is that, so understood, neither establishes its conclusion. The first involves a pair of counterfactual situations that are equally possible or tied. If A=B and A=C have no truth value, a counterfactual conditional with one of them as consequent and an antecedent that is true in circumstances in which either is true should have no truth value. Intuitively, however, any such counterfactual is false. The second argument can be seen to invite an analogous response. If this is right, however, there is an important disanalogy between this and the classical paradox of the heap. If the disanalogy is only apparent, the argument shows at most that the existence of persons can be indeterminate. (shrink)

Thought-experiments in which one person divides into two have been important in the literature on personal identity. I consider three influential arguments which aim to undermine the force of these thought-experiments – arguments from David Wiggins, Patricia Kitcher and Kathleen Wilkes. I argue that all three fail, leaving us to face the consequences of splitting, whatever those may be.

Thought-experiments in which one person divides into two have been important in the literature on personal identity. I consider three influential arguments which aim to undermine the force of these thought-experiments – arguments from David Wiggins, Patricia Kitcher and Kathleen Wilkes. I argue that all three fail, leaving us to face the consequences of splitting, whatever those may be.

Imagine that you and a duplicate of yourself are lying unconscious, next to each other, about to undergo a complete step-by-step exchange of bits of your bodies. It certainly seems that at no stage in this exchange of bits will you have thereby switched places with your duplicate. Yet it also seems that the end-result, with all the bits exchanged, will be essentially that of the two of you having switched places. Where will you awaken? I claim that one and (...) the same person possesses both bodies, occupies both places and will experience both awakenings, just as a person whose brain has been bisected must at once experience both of the unconnected fields of awareness, even though each of these will falsely appear to him as the entirety of his experience. I also claim that the more usual apparent boundaries of persons are as illusory as those in brain bisection; personal identity remains unchanged through any variation or multiplication of body or mind. In all conscious life there is only one person - I - whose existence depends merely on the presence of a quality that is inherent in all experience - its quality of being mine, the simple immediacy of it for whatever is having experience. One powerful argument for this is statistical: on the ordinary view of personhood it is an incredible coincidence for you (though not for others) that out of 200,000,000 sperm cells the very one required on each occasion for your future existence was first to the egg in each of the begettings of yourself and all your ancestors. The only view that does not make your existence incredible, and that is not therefore (from your perspective) an incredible view, is that any conscious being would necessarily have been you anyway. It is a consequence that self-interest should extend to all conscious organisms. (shrink)

The paper takes a close look at Derek Parfit’s example of the Nineteenth Century Russian in 'Reasons and Persons'. Parfit presents it as an example which illustrates the moral consequences of adopting his reductionist view of personal identity in a positive light. I argue that things turn out to be more complex than he envisages, and that it might be far more difficult to live in his world than he allows.