Stage theorists invoke the idea of counterpart relations to make sense of how objects are able to persist despite their claim that an object is identical with a single instantaneous stage. According to stage theorists, an object persists if and only if it has a later counterpart that bears the appropriate counterpart relation of identity to it. Whilst objects can and do persist, stages cannot and do not. This seems to amount to a refutation of Leibniz’s law. Stage theorists think (...) that the nature of the counterpart relation invoked depends on how it is that the object is referred to. In this paper, I argue that the context sensitivity that they invoke here gives stage theorists a response to the Leibniz’s Law Problem. (shrink)

In “Justice at the Margins: The Social Contract and the Challenge of Marginal Cases” (Southern Journal of Philosophy, 55.1), Nathan Bauer and David Svolba appeal to a concept of recognition found in social contract theory to argue that all humans, including humans who lack certain unique cognitive abilities, so‐called marginal cases, have rights that nonhuman animals lack. The main reason is that we can recognize ourselves in all humans, but not in nonhuman animals. I argue (i) that it is unclear (...) that we can recognize ourselves in certain types of marginal cases, such as corpses and embryos; (ii) that Bauer and Svolba’s reason for why we cannot recognize ourselves in nonhuman animals is questionable; and (iii) if we can recognize ourselves in any types of marginal cases, then we should be able to recognize ourselves in nonhuman animals. (shrink)

When does a human being begin to exist? We argue that it is possible, through a combination of biological fact and philosophical analysis, to provide a definitive answer to this question. We lay down a set of conditions for being a human being, and we determine when, in the course of normal fetal development, these conditions are first satisfied. Issues dealt with along the way include: modes of substance-formation, twinning, the nature of the intra-uterine environment, and the nature of the (...) relation between fetus and mother (connection, parthood, dependence). (shrink)

Marquis’ future-like-ours argument against the morality of abortion assumes animalism—a family of theories according to which we are animals. Such an assumption is theoretically useful for various reasons, e.g., because it provides the theoretical underpinning for a reply to the contraception-abstinence objection. However, the connection between the future-like-ours argument and one popular version of animalism can prove lethal to the former, or so I argue in this paper.

: A key consideration in favour of animalism—the thesis that persons like you and me are identical to the animals we walk around with—is that it avoids a too many thinkers problem that arises for non-animalist positions. The problem is that it seems that any person-constituting animal would itself be able to think, but if wherever there is a thinking person there is a thinking animal distinct from it then there are at least two thinkers wherever there is a thinking (...) person. Most find this result unacceptable, and some think it provides an excellent reason for accepting animalism. It has been argued, however, that animalists face an analogous problem of too many thinkers, the so-called corpse problem, as they must accept both 1) that we are distinct from our bodies, as our bodies can and we cannot persist through death as corpses and 2) that our bodies can think. I argue that the best reasons animalists have for accepting the two claims that generate the distinctness part of the problem double up as reasons to reject the claim that our bodies can think, and vice versa. I argue further that Lockeans cannot similarly get around their problem of too many thinkers. (shrink)

The epistemological debate about radical skepticism has focused on whether our beliefs in apparently obvious claims, such as the claim that we have hands, amount to knowledge. Arguably, however, our concept of knowledge is only one of many knowledge-like concepts that there are. If this is correct, it follows that even if our beliefs satisfy our concept of knowledge, there are many other relevantly similar concepts that they fail to satisfy. And this might give us pause. After all, we might (...) wonder: What is so great about the concept of knowledge that we happen to have? Might it be more important, epistemically speaking, to investigate whether our beliefs satisfy some other relevantly similar concept instead? And how should questions such as these even be understood? This paper discusses the epistemological significance of these issues. In particular, a novel skeptical stance called ‘meta-skepticism’ is introduced, which is a kind of skepticism about the idea that some knowledge-like concepts are epistemically more important than others. It suggested that it is unclear whether this form of skepticism can be avoided. (shrink)

I argue that, given certain prominent views of personal identity and prudence, the nonidentity problem, or a very similar problem, can arise postconception. I clarify and defend this claim by considering the implications of these views for prenatal injury.

Jeff McMahan's impressive recent defence of the embodied mind theory of personal identity in his highly acclaimed work The Ethics of Killing has undoubtedly reawakened belief that physical continuity is a necessary component of the relation that matters in our self-interested concern for the future. My aim in this paper is to resist this belief in a somewhat roundabout way. I want to address this belief in a somewhat roundabout way by revisiting a classic defence of the belief that enormous (...) changes in the contents of a person's psychology does not preclude justified fear of future pain. I have in mind Bernard Williams' The Self and the Future (1970) in which he argues, against the psychological view, that physical continuity is necessary for survival. I examine Williams' second thought experiment which ostensibly supports that intuition and afterwards defend two related claims. First, I argue that a close examination of the second thought experiment reveals that one's prior commitments to a particular criterion of personal identity can influence one's response to that thought experiment. Second, I argue that Williams' second thought experiment is set out in questionbegging terms. I do not claim, however, that the intuition under consideration lacks justification; I only claim that Williams' second thought experiment does not provide the needed support. (shrink)

Two of the main contenders in the debate about personal persistence over time are the neo-Lockean psychological continuity view and animalism as defended by Olson and Snowdon. Both are wrong. The position I shall argue for, which I call, following Olson, the hybrid view, takes psychological continuity as a sufficient but, pace the neo-Lockeans, not necessary condition for personal persistence. It sides with the animalist in allowing that mere biological continuity is also sufficient. So I am, in a sense, a (...) psychological continuity theorist. But I am also in a sense, a biological theorist. (shrink)

I aim to show that, contrary to standard deflationary or eliminativist theories of the self, we can argue from the phenomenology of pre-reflective self-awareness for the thesis that subjects of experience are substances. The phenomenological datum of subjectivity points to a specific metaphysical structure of our experience, that is, towards the substance view rather than the bundle or the minimal self view. Drawing on modern philosophical accounts of pre-reflective self-awareness, mineness and (self-) acquaintance, I will argue that a subject is (...) aware of being the one individual who has many experiences and that it is revealed to the subject that it is the bearer of experiences and their unifier. The subject is present in pre-reflective awareness and known as the subject of experiences, and even this minimal self-awareness gives us reason to favour the substance view. Thus, one can demonstrate how the debates on the phenomenology of pre-reflective self-awareness and the metaphysics of selfhood intersect. (shrink)

In this article, I explore difficult and sensitive questions regarding the nature of transgender identity claims and the appropriate medical treatment for those suffering from gender dysphoria. I first analyze conceptions of transgender identity, highlighting the prominence of the wrong-body narrative and its dualist presuppositions. I then briefly argue that dualism is false because our bodily identity is essential and intrinsic to our overall personal identity and explain why a sound, nondualist anthropology implies that gender identity cannot be entirely divorced (...) from sexual identity. Finally, I make the case that arguments in favor of hormonal and surgical treatments for gender dysphoria rest on this mistaken dualist anthropology, and that these treatments therefore give false hope to those suffering from gender dysphoria, while causing irreversible bodily harm and diverting attention from underlying psychological problems that often need to be addressed. I also briefly discuss how these philosophical claims relate to empirical studies on the outcomes of hormonal and surgical treatments for gender dysphoria and to testimonies of transgender individuals who regret having undergone these treatments. (shrink)

The Problem of Biological Individuality is the problem of how to count organisms. Whilst counting organisms may seem easy, the biological world is full of difficult cases such as colonial siphonophores and aspen tree groves. One of the main solutions to the Problem of Biological Individuality is the Physiological Approach. Drawing on an argument made by Eric Olson in the personal identity debate, I argue that the Physiological Approach faces a metaphysical problem - the ‘Foetus Problem’. This paper illustrates how (...) metaphysics can contribute to debates about organisms in the philosophy of biology. (shrink)

The Problem of Biological Individuality is the problem of how to count organisms. Whilst counting organisms may seem easy, the biological world is full of difficult cases such as colonial siphonophores and aspen tree groves. One of the main solutions to the Problem of Biological Individuality is the Physiological Approach. Drawing on an argument made by Eric Olson in the personal identity debate, I argue that the Physiological Approach faces a metaphysical problem - the ‘Foetus Problem’. This paper illustrates how (...) metaphysics can contribute to debates about organisms in the philosophy of biology. (shrink)

A basic component of moral objections to embryonic stem cell research is the claim that human embryos have the same moral status as typical adult human beings. There is no reason to accept this claim, however, unless adult humans once existed as embryos—that is, unless the developmental history of adult humans contains embryos to which the adults are numerically identical. The purpose of this paper is to argue that there are no such identities, and hence that no adult human being (...) ever existed as an embryo. (shrink)

Abortion remains a controversial topic, with pro-life and pro-choice advocates clashing fiercely. However, public polling demonstrates that the vast majority of the Western public holds a middle position: being in favour of abortion but not in all circumstances nor at any time. The intuitions held by the majority seem to imply a contradiction: two early foetuses at the same point in development have different moral statuses. Providing coherent philosophical grounding for this intuition has proved challenging. Solutions given by philosophers such (...) as Feinberg, Harman and Räsänen are complex and do not fully account for the lived experience of pregnancy loss. This article argues for a relational ontological construction of human personhood as the basis of foetal personhood. This approach takes seriously the literature of pregnancy loss and the lived experiences of pregnant persons. Focusing on the manner in which persons relate to early foetuses (especially pregnant persons), provides a coherent ground for distinct foetal value. Importantly, this approach is both simple and intuitive. Therefore, it can be more easily adopted by middle. To counter an implied equality of human relationality, the article argues for a clear hierarchy based on relational proximity that affirms pregnant persons? primary role in deciding the moral significance of foetal termination. (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)

This paper aims to propose and justify a framework for understanding the concept of personhood in both biological and artificial entities. The framework is based on a set of requirements that make up a suitable cognitive architecture for an entity to be considered a person, including the ability to have propositionally structured intentional states, having a form of sensory capabilities, and having a means of interacting with the environment. The case of individuals in a persistent vegetative state, as studied by (...) Owen, serves as an example to show the importance of each of these requirements and the possibility of a "hybridization" of personhood. The proposed set of requirements provide a complete framework for understanding the concept of personhood and highlight the significance of cognitive architecture in determining personhood. (shrink)

Deep brain stimulation 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)

Should Christians support the view that one’s psychological continuity is the main criterion of personal identity? Is the continuity of one’s brain or memory states necessary and sufficient for the identicalness of the person? This paper investigates the plausibility of the psychological continuity theory of personal identity, which holds that the criterion of personal identity is certain psychological continuity between persons existing at different times. I argue that the psychological continuity theory in its various forms suffers from interminable problems. Then, (...) I introduce an alternate account of personal identity, according to which personal identity is not further analyzable in terms of qualitative properties of persons. Rather, persons are individuated by their primitive thisnesses, which are nonqualitative properties of immaterial substances. This alternate conception of personal identity would be of particular relevance to those who believe in the immortality of the soul and are looking for a nonphysicalist account of personal identity. (shrink)

In this essay, I attempt to provide answers to the following four queries concerning the metaphysics of early human embryogenesis. (1) Following its first cellular fission, is it coherent to claim that one and only one of two “blastomeric” twins of a human zygote is identical with that zygote? (2) Following the fusion of two human pre-embryos, is it coherent to claim that one and only one pre-fusion pre-embryo is identical with that postfusion pre-embryo? (3) Does a live human being (...) come into existence only when its brain comes into existence? (4) At implantation, does a pre-embryo become a mere part of its mother? I argue that either if things have quidditative properties or if criterialism is false, then queries (1) and (2) can be answered in the affirmative; that in light of recent developments in theories of human death and in light of a more “functional” theory of brains, query (3) can be answered in the negative; and that plausible mereological principles require a negative answer to query (4). (shrink)

In this article, I examine the standard assumption that ethical disagreements on abortion and human embryonic stem cells research are grounded on metaphysical claims that underlie these ethical issues. Contrary to what some philosophers have claimed, I argue that, although the bioethical positions about the human embryo’s moral status are partly grounded on metaphysical claims, incorporating metaphysical arguments in the debates about the ethics of reproduction will not resolve this issue.

It is not the case that there is only one literal sense of “same person.” When presented in different contexts, “she is/is not the same person” can have different answers concerning the same entity or set of entities across the same period of time. This is because: Persons are composed of many parts, and different parts have different persistence conditions. This follows from a reductionist view of the self. When we ask about sameness of persons, or “personal identity,” we are (...) asking because of certain practical concerns. Different concerns will look to the persistence of different parts of the person for criteria of sameness. No single criterion of sameness tracks all concerns. By combining reductionism with contextualism, the disparate answers to the personal identity question can be clarified without losing the practical concerns motivating them. (shrink)

In dicephalus conjoined twinning, it appears that two heads share a body; in cephalopagus, it appears that two bodies share a head. How many human animals are present in these cases? One answer is that there are two in both cases—conjoined twins are precisely that, conjoined twins. Another is that the number of humans corresponds to the number of bodies—so there is one in dicephalus and two in cephalopagus. I show that both of these answers are incorrect. Prominent accounts of (...) biological individuation, which treat the organism as an integrated whole, reveal that in these and other cases of conjoined twinning the ‘twins’ share a single human animal. This has a number of consequences for the debate about what we are. First, if animalism is true, individuals of our kind can be—and are—profoundly psychologically divided. Second, cephalopagus twinning does not divide animalism from its rivals, as has been claimed. Finally, animalists can reply to a vicious species of the ‘too many thinkers’ problem to which they are allegedly uniquely vulnerable. (shrink)

Many Christians assume that there are only two possibilities for what a human person is: either Animalism (the view that we are fundamentally animals) or Immaterialism (the view that we are fundamentally immaterial souls). I set out a third possibility: the Constitution View (the view that we are material beings, constituted by bodies but not identical to the bodies that now constitute us.) After setting out and briefly defending the Constitution View, I apply it to the doctrine of resurrection. I (...) conclude by giving reasons for Christians to prefer the Constitution View of human persons to both Animalism and Immaterialism. (shrink)

How should we count people who have two cerebral hemispheres that cooperate to support one mental life at the level required for personhood even though each hemisphere can be disconnected from the other and support its "own" divergent mental life at that level? On the standard method of counting people, there is only one person sitting in your chair and thinking your thoughts even if you have two cerebral hemispheres of this kind. Is this method accurate? In this paper, I (...) argue that it is not, and I advocate an alternative I call the Multiple Person View. (shrink)

Among your closest associates is a certain human animal – a living, breathing, organism. You see it when you look in the mirror. When it is sick, you don't feel too well. Where it goes, you go. And, one thinks, where you go, it must follow. Indeed, you can make it move through sheer force of will. You bear, in short, an important and intimate relation to this, your animal. So too rest of us with our animals. Animalism says that (...) this relation is nothing short of identity. According to animalists, we do not only coincide with or constitute or inhabit or otherwise hang out with these close associates, our animals: we are them. In this article, I offer an opinionated take on what animalism might be and situate it against contemporary rivals. Then, I outline a simple case for animalism. Finally, I sketch non-standard routes for animalists to take in light of standard challenges. My goal in all of this is to open up some new avenues of animalist thinking. (shrink)

Standard views of personal identity over time often hover uneasily between the subjective, first-person dimension (e. g. psychological continuity), and the objective, third-person dimension (e. g. biological continuity) of a person’s life. Since both dimensions capture something integral to personal identity, we show that neither can successfully be discarded in favor of the other. The apparent need to reconcile subjectivity and objectivity, however, presents standard views with problems both in seeking an ontological footing of, as well as epistemic evidence for, (...) personal identity. We contend that a fresh look at neutral monism offers a novel way to tackle these problems; counting on the most fundamental building blocks of reality to be ontologically neutral with regards to subjectivity and objectivity of personal identity. If the basic units of reality are, in fact, ontologically neutral – but can give rise to mental as well as physical events – these basic units of reality might account for both subjectivity and objectivity in personal identity. If this were true, it would turn out that subjectivity and objectivity are not conflictive dimensions of personal identity but rather two sides of the same coin. (shrink)

This paper analyzes the transformation from the human zygote to the implanted embryo under the prism of substantial change. After a brief introduction, it vindicates the Aristotelian ideas of substance and accident, and those of substantial and accidental change. It then claims that the transformation from the multicelled zygote to the implanted embryo amounts to a substantial change. Pushing further, it contends that this substantial change cannot be explained following patterns of genetic reductionism, emergence, and self-organization, and proposes Gustavo Bueno’s (...) idea of anamorphosis as a means to encapsulate criticism against such positions. (shrink)

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)

Here I develop an account of our persistence that accommodates each of the following compelling intuitions: (i) that we are animals, (ii) that we existed prior to the onset of whatever psychological capacities are necessary for personhood, and we can continue to exist with the loss of those and other psychological capacities, (iii) that with suitable psychological continuity, the person goes with the brain/cerebrum in remnant person and brain/cerebrum transplant cases, and (iv) that it is possible for us to survive (...) gradual large-scale replacement of organic with inorganic parts. With the help of a couple of recent “hybrid” animalist accounts I develop an analysis of our persistence that entails (ii)–(iv) while being consistent with (i). (shrink)

Eric T. Olson argues for a position in personal identity called Animalism. Olson's definition of ‘what we are’ is what the biological community currently defines as the ‘human animal’. While Olson argues his definition is determinate and anti-relativist, I object by maintaining that his definition is fundamentally soft relativist. This is accomplished by asking : 1) why favour the biological definition over other cultural definitions? – and by arguing : 2) that nothing stops the biological definition from changing ; 3) (...) that the biological definition is classificatory and not ontologically explanatory ; 4) that biology may drop the concept ‘human animal’ leaving no definition of ‘what we are’. Finally, I look at which ontological decisions Olson makes and ask if there is any hope for Animalism and for the human philosopher with no proven ontology. In my conclusion, I follow Olson’s surprising admission by suggesting that I have no idea what we are. (shrink)

This paper focuses on three theories of personal identity that incorporate the idea that personal identity is the result of a person’s adopting certain attitudes towards certain mental states and actions. I call these theories subjective theories of personal identity. I argue that it is not clear what the proponents of these theories mean by “personal identity”. On standard theories, such as animalism or psychological theories, the term “personal identity” refers to the numerical identity of persons and its analysis provides (...) the persistence conditions for persons. I argue that if the subjective theories purport to provide a criterion of numerical personal identity, they fail. A different interpretation may suggest that they purport to provide a non-numerical type of identity for the purpose of providing plausible analyses of certain identity-related practical concerns. I argue that the criteria the subjective theories provide fail to capture several of the identity-related concerns. As a result, this interpretation must be rejected as well. (shrink)