On the strict liability view, excusably ignorant agents must cover all the wrongful costs they have inadvertently brought onto others, although it is undisputed that they are not at fault. On the fault liability view, victims need not be compensated by excusably ignorant harmers. To some, both views appear harsh. Under fault liability, those who cause harm are seen as getting off scot-free while victims suffer. Under strict liability, agents are viewed as being burdened without any fault of their own. (...) In response to a seemingly intractable conflict between competing theories, some have called for compromise. Caney :210, 2010) has proposed a “modified strict liability principle” which was further developed by Bell :391–411, 2011). The principle’s revision is promising because it gives substantive reason for why and how middle ground should be achieved. In this paper, I assess this proposal and the prospects for mediating between strict and fault liability more generally. Specifically, I introduce concepts, present Bell’s principle of limited liability, critique it, and explore general avenues for finding middle ground between strict and fault liability. (shrink)

Viele Menschen halten Patientenverfügungen für ein geeignetes Mittel, um selbstbestimmt zu entscheiden, wie mit ihnen im Fall schwerer Demenz umgegangen werden soll. Die meisten Bioethiker stimmen ihnen zu: Demenzverfügungen seien Ausdruck der „verlängerten Autonomie“ der Patientin. Doch ob sie recht haben, ist unklar. Dem viel beachteten Identitätseinwand zufolge sind die Ausstellerin der Verfügung und ihre schwer demente Nachfolgerin numerisch verschieden: Sie sind zwei und nicht eins. Wenn das stimmt, kann die Ausstellerin nicht verfügen, wie mit ihr im Falle schwerer Demenz (...) umgegangen werden soll. Die Demenzverfügung ist ungültig. In meinem Aufsatz möchte ich eine neue Replik auf diesen Einwand vorstellen. Ihr Ansatzpunkt ist der menschliche Organismus, den wir sehen, wenn wir in den Spiegel blicken. Er kann schwer dement werden, und auch er hat die Patientenverfügung unterschrieben. Warum sollte sie dann ungültig sein? Auf den ersten Blick hat diese Replik eine Reihe von Vorzügen. Insbesondere akzeptiert sie die populären Annahmen, auf denen der Identitätseinwand basiert. Bei näherem Hinsehen zeigen sich jedoch Probleme, die so gravierend sind, dass wir von ihr Abstand nehmen sollten. (shrink)

Has the time come to put to bed the concept of a harm threshold when discussing the ethics of reproductive decision making and the legal limits that should be placed upon it? In this commentary, we defend the claim that there exist good moral reasons, despite the conclusions of the non-identity problem, based on the interests of those we might create, to refrain from bringing to birth individuals whose lives are often described in the philosophical literature as ‘less than worth (...) living’. (shrink)

The view that it is better for life to be created free of disability is pervasive in both common sense and philosophy. We cast doubt on this view by focusing on an influential line of thinking that manifests it. That thinking begins with a widely-discussed principle, Procreative Beneficence, and draws conclusions about parental choice and disability. After reconstructing two versions of this argument, we critique the first by exploring the relationship between different understandings of well-being and disability, and the second (...) by more briefly focusing on the idea of a significant reason. By placing these results against the broader historical and ongoing contexts in which the lives of those with disabilities have been deemed of inferior quality, we conclude with a call for greater humility about disability and well-being in thought and practice. (shrink)

In this quite modestly ambitious essay, I'll generally just assume that, for the most part, our "scientifically informed" commonsense view of the world is true. Just as it is with such unthinking things as planets, plates and, I suppose, plants, too, so it also is with all earthly thinking beings, from people to pigs and pigeons; each occupies a region of space, however large or small, in which all are spatially related to each other. Or, at least, so it is (...) with the bodies of these beings. And, even as each of these ordinary entities extends through some space, so, also, each endures through some time. In line with that, each ordinary entity is at least very largely, and is perhaps entirely, an enduring physical entity (which allows that many might have certain properties that aren't purely physical properties.) Further, each ordinary enduring entity is a physically complex entity: Not only is each composed of parts, but many of these parts, whether or not absolutely all of them, are themselves enduring physical entities, and many of them also are such physically complex continuing entities. When an ordinary entity undergoes a significant change, then, at least generally, this change will involve changes concerning that entity's constituting physical parts, whether it be a rearrangement of (some of) these parts, or a loss of parts, or a gain of parts, or whatever. Often, the entity will still exist even after the change occurs. As we may well suppose, this happens when, from two strokes of an ax, an ordinary log loses just a chip of wood. As we may then say, such a change conforms with the log's "persistence conditions." Somewhat less often, such an ordinary entity undergoes a change that means an end to it: When a bomb's explosion makes our log become just so many widely scattered motes of dust, the log will no longer exist. Such a momentous change doesn't conform with the log's persistence conditions. (shrink)

John Rawls's famous difference principle is capable of at least four distinct statements, each of which occurs in A Theory of Justice. According to what I shall term the Crude Principle it is a necessary and sufficient condition for the justice of an institutional scheme which expands social and economic inequality that, subject to the satisfaction of more weighty principles, it increases the level of advantage of the least advantaged. Expressing this principle Rawls writes that,Assuming the framework of institutions required (...) by equal liberty and fair equality of opportunity, the higher expectations of those better situated are just if and only if they work as part of a scheme which improves the expectations of the least advantaged members of society. The intuitive idea is that the social order is not to establish and secure the more attractive prospects of those better off unless doing so is to the advantage of those less fortunate. (shrink)

In some sense, survival seems to be an intrinsic matter. Whether or not you survive some event seems to depend on what goes on with you yourself —what happens in the environment shouldn’t make a difference. Likewise, being a person at a time seems intrinsic. The principle that survival seems intrinsic is one factor which makes personal fission puzzles so awkward. Fission scenarios present cases where if survival is an intrinsic matter, it appears that an individual could survive twice over. (...) But it’s well known that standard notions of “intrinsicality” won’t do to articulate the sense in which survival is intrinsic, since ‘personhood’ appears to be a maximal property. We formulate a sense in which survival and personhood (and perhaps other maximal properties) may be almost intrinsic—a sense that would suffice, for example, to ground fission arguments. It turns out that this notion of almost-intrinsicality allows us to formulate a new version of the problem of the many. (shrink)

David Wallace has given a decision-theoretic argument for the Born Rule in the context of Everettian quantum mechanics. This approach promises to resolve some long-standing problems with probability in EQM, but it has faced plenty of resistance. One kind of objection charges that the requisite notion of decision-theoretic uncertainty is unavailable in the Everettian picture, so that the argument cannot gain any traction; another kind of objection grants the proof’s applicability and targets the premises. In this article I propose some (...) novel principles connecting the physics of EQM with the metaphysics of modality, and argue that in the resulting framework the incoherence problem does not arise. These principles also help to justify one of the most controversial premises of Wallace’s argument, ‘branching indifference’. Absent any a priori reason to align the metaphysics with the physics in some other way, the proposed principles can be adopted on grounds of theoretical utility. The upshot is that Everettians can, after all, make clear sense of objective probability. 1 Introduction2 Setup3 Individualism versus Collectivism4 The Ingredients of Indexicalism5 Indexicalism and Incoherence5.1 The trivialization problem5.2 The uncertainty problem6 Indexicalism and Branching Indifference6.1 Introducing branching indifference6.2 The pragmatic defence of branching indifference6.3 The non-existence defence of branching indifference6.4 The indexicalist defence of branching indifference7 Conclusion. (shrink)

Imagine you and your friend Pierre agreed on meeting each other at a café, but he does not show up. What is the difference between a friend’s not showing up meeting? and any other person not coming? In some sense, all people who did not come show the same kind of behaviour, but most people would be willing to say that the absence of a friend who you expected to see is different in kind. In this paper, I will spell (...) out this difference by investigating laypeople’s conceptualisation of absences of actions in four experiments. In languages such as German, French, Italian, or Polish, people consider a friend’s not coming an omission. Any other person’s not coming, in contrast, is not considered an omission at all, but just a mere nothing. This use of the term omission differs from the usage in English, where ‘omission’ refers to all kinds of absences. In addition, ‘omission’ is not even an everyday term, but invented by philosophers for the sake of philosophical investigation. In other languages, ‘omission’ is part of an everyday vocabulary. Finally, I will discuss how this folk concept of omission could be made fruitful for philosophical questions. (shrink)

Revisionary theories of logic or truth require revisionary theories of mind. This essay outlines nonclassically based theories of rational belief, desire, and decision making, singling out the supervaluational family for special attention. To see these nonclassical theories of mind in action, this essay examines a debate between David Lewis and Derek Parfit over what matters in survival. Lewis argued that indeterminacy in personal identity allows caring about psychological connectedness and caring about personal identity to amount to the same thing. The (...) essay argues that Lewis's treatment of two of Parfit's puzzle cases—degreed survival and fission—presuppose different nonclassical treatments of belief and desire. (shrink)

In a recent letter to Canada's national newspaper, The Globe and Mail, British columnist and climate change gadfly George Monbiot pleaded with Canada to clean up its greenhouse gas emissions act. The letter appeared just a week before the Copenhagen climate conference. In it, Monbiot alleged that Canada's newly acquired status as oil superpower threatens to ?brutalize? the country, as it has other oil-rich countries (Monbiot, G. 2009. Please, Canada, clean up your act, The Globe and Mail, November 30, A15). (...) In this paper, I want to expand on Monbiot's bleak assessment of the Canadian national psyche. It has been pointed out that climate change is forcing us to rethink philosophical ethics. Some, like Dale Jamieson, believe that virtue theory is best equipped to meet the challenge of understanding the moral dimensions of this phenomenon. I think this is basically right, but that climate change is also forcing us to reassess our capacity for moral progress. The two challenges are linked. In what follows, I will first (Section 1) motivate the appeal to virtue ethics as a new way of understanding the ethics of climate change. Next (Section 2), I offer a virtue ethical account of moral progress. With the latter in place, we can (Section 3) uncover the real nature of Canada's moral failing on climate change: it is an impediment to the moral progress of our species. (shrink)

Although the Evans argument against vague identity has been much discussed, proposah for blocking it have not so far satisfied general conditions which any solution ought to meet. Moreover, the relation between ontically vague identity and ontic vagueness more generally has not yet been satisfactorily addressed. I advocate a way of resisting the Evans argument which satisfies the conditions. To show how this approach can vindicate particular cases of ontically vague identity, I develop a framework for describing ontic vagueness in (...) general in terms of multiple actualities. This provides aprìncipled approach to ontically vague identity which is unaffected by the Evans argument. (shrink)

In recent years, the question of whether prospective parents might have a moral obligation to select against disability in their offspring has piqued the attention of many prominent philosophers and bioethicists, and a large literature has emerged surrounding this question. Rather than looking to the most common arguments given in support of a positive response to the abovementioned question, such as those focusing on the harms disability may impose on the child created, duties and role-specific obligations, and impersonal ‘harms’, a (...) less commonly made set of arguments is focused upon which looks to the harms that a decision not to select against disability may impose on others. Three different possible arguments supporting a limited duty of disability avoidance are thus identified and subsequently explored: harms to parents themselves, harms to existing family members, and harms to other existing members of society. (shrink)

The ArgumentEugenics is generally regarded as evil; but what was its sin? Racism, class bias, and violation of reproductive freedom, which tainted objectionable eugenic interventions, are not part of the core notion of eugenics. A number of candidates have been suggested as the wrong inherent in eugenics, ranging from statism to the impossibility of consensus on the ideal human being. It is most plausible to view eugenics as sharing moral dilemmas with much of public health, and the critical issues as (...) those of distributive justice. (shrink)

This paper reflects on the relationship between theory and practice in bioethics, by using various concepts drawn from debates on innovation in healthcare research—in particular debates around how best to connect up blue skies ‘basic’ research with practical innovations that can improve human lives. It argues that it is a mistake to assume that the most difficult and important questions in bioethics are the most abstract ones, and also a mistake to assume that getting clear about abstract cases will automatically (...) be of much help in getting clear about more complex cases. It replaces this implicitly linear model with a more complex one that draws on the idea of translational research in healthcare. On the translational model, there is a continuum of cases from the most simple and abstract to the most concrete and complex. Insights need to travel in both directions along this continuum—from the more abstract to the more concrete and from the more concrete to the more abstract. The paper maps out some difficulties in moving from simpler to more complex cases, and in doing so makes recommendations about the future of bioethics. (shrink)

What role should legislation or policy play in avoiding the complications of in-vitro fertilization? In this article, we focus on single versus double embryo transfer, and assess three arguments in favour of mandatory single embryo transfer: risks to the mother, risks to resultant children, and costs to society. We highlight significant ethical concerns about each of these. Reproductive autonomy and non-paternalism are strong enough to outweigh the health concerns for the woman. Complications due to non-identity cast doubt on the extent (...) to which children are harmed. Twinning may offer an overall benefit rather than burden to society. Finally, including the future health costs for children in reproductive policy is inconsistent with other decisions. We conclude that mandatory single embryo transfer is not justified and that a number of countries should reconsider their current embryo transfer policy. (shrink)

What are the main features that influence our attribution of moral responsibility? It is widely accepted that there are various factors which strongly influence our moral judgments, such as the agent’s intentions, the consequences of the action, the causal involvement of the agent, and the agent’s freedom and ability to do otherwise. In this paper, we argue that this picture is incomplete: We argue that social roles are an additional key factor that is radically underestimated in the extant literature. We (...) will present an experiment to support this claim. (shrink)

Ronald Dworkin argues on the basis of a theory of well-being that critical paternalism is self-defeating. People must endorse their lives if they are to benefit. This is the endorsement constraint and this paper rejects it. For certain kinds of important mistakes that people can make in their lives, the endorsement constraint is either incredible or too narrow to rule out as much paternalism as Dworkin wants. The endorsement constraint cannot be interpreted to give sensible judgements when people change their (...) minds about the value of their lives. And the main argument for the endorsement constraint, which is based on the value of integrity, does not support Dworkin's anti-paternalism. (shrink)

The paper takes off from the problem of finding a proper content for the relation of identity as it holds or fails to hold among ordinary things or substances. The necessary conditions of identity are familiar, the sufficient conditions less so. The search is for conditions at once better usable than the Leibnizian Identity of Indiscernibles (independently suspect) and strong enough to underwrite all the formal properties of the relation.It is contended that the key to this problem rests at the (...) level of metaphysics and epistemology alike with a sortalist position. Sortalism is the position which insists that, if the question is whether a and b are the same, it has to be asked what are they? Any sufficiently specific answer to that question will bring with it a principle of activity or functioning and a mode of behaviour characteristic of some particular kind of thing by reference to which questions of persistence or non-persistence through change can be adjudicated.These contentions are illustrated by reference to familiar examples such as the human zygote, the Ship of Theseus and Shoemaker's Brown-Brownson. The first example is hostage for a mass of unproblematical cases. The problems presented by the second and third sort of examples arise chiefly (it is claimed) from an incompleteness in our conceptions of the relevant sort—the what the thing in question is. That incompleteness need not prevent us from knowing perfectly well which thing we are referring to. In the concluding section, sortalism is defended against various accusations of anthropocentrism.The paper touches on the interpretation of Heraclitus, Leibniz's theory of clear indistinct ideas, the difficulties of David Lewis's ‘perdurantist’ or stroboscopic view of persistence, four-dimensionalism, and the relation of personal identity both to experiential memory and to the particular bodily physiognomy of a subject. At some points—as in connection with the so-called Only a and b rule—the paper corrects, supplements or extends certain theses or formulations proposed in the author's Sameness and Substance Renewed (2001). (shrink)

_ doi:10.1093/analys/anx072 _, published: 27 June 2017.

Anti-exceptionalism about logic takes logical theories to be continuous with scientific theories. Scientific theories are subject to criteria of theoretical equivalence. This article compares two types of theoretical equivalence – one syntactic and one semantic – in the context of logical anti-exceptionalism, and argues that the syntactic approach leads to undesirable consequences. The anti-exceptionalist should therefore take a semantic approach when evaluating whether logical theories, understood as scientific theories, are equivalent. This article argues for a particular semantic approach, in terms (...) of categorical equivalence, to determine whether logical theories are equivalent. (shrink)

John White; The Compulsory Curriculum and Beyond: a reply to Peter Gardner, Journal of Philosophy of Education, Volume 19, Issue 1, 30 May 2006, Pages 129–136.

Little is known about how the minds and bodies of reincarnated agents are represented. In three studies, participants decided which individual, out of multiple contenders, was most likely to be the reincarnation of a deceased person, based upon a single matching feature between the deceased and each of the candidates. While most participants endorsed reincarnation as entailing a new body, they reasoned that candidates with a similar physical mark or a similar episodic autobiographical memory to the deceased, when alive, were (...) more likely than candidates with other physical or psychological based similarities to be the reincarnation of the deceased. As predicted, by increasing the distinctiveness of a matching physical mark and an episodic autobiographical memory, while holding others constant, likelihood judgments for the candidate with the similar distinctive physical mark were significantly higher than candidates with non-distinctive physical marks, but differences between the distinct and general episodic autobiographical memory condition did not reach statistical significance. These findings support the claim that we intuitively represent reincarnated agents as psychologically determined but physically embodied, and that different assumptions underpin the use of physical and psychological features to establish identity in reincarnation contexts. (shrink)

Pediatric research without the potential for clinical benefit is vital to improving pediatric medical care. This research also raises ethical concern and is regarded by courts and commentators as unethical. While at least 10 justifications have been proposed in response, all have fundamental limitations. This article describes and defends a new justification based on the fact that enrollment in clinical research offers children the opportunity to contribute to a valuable project. Contributing as children to valuable projects can benefit individuals in (...) two ways. First, individuals may come to ?embrace? the contributions they made as children. Second, contributing to valuable projects can lead to a better overall life. Because these potential benefits can outweigh small research risks, they provide a justification for pediatric research without the potential for clinical benefit, when it poses low risks and has the potential to benefit others in important ways. (shrink)

Must principles of justice be practical? Some political philosophers, the “implementers,” say yes. Others, the “idealists,” say no. Despite this disagreement, the implementers and idealists agree on what “practical” means, subscribing to the “implementation-prediction” conception of practicality. They also seem to agree that principles of so-called “ideal theory” need not be IP-practical. The implementers take this as a reason to reject ideal theory as an approach to principles of justice, while the idealists do not. In this paper, I argue that (...) we should reject the IP conception of practicality. The implementers make a mistake, then, by requiring principles of justice to be IP-practical. But the idealists make a mistake, too, by rejecting in general the requirement that principles of justice be practical. For there is a plausible alternative conception of practicality that political philosophers should accept: the “experimentation-learning” conception. EL-practicality makes for a more realistic and epistemically accessible standard of practicality, and thus should be welcomed by the realistically-inclined implementers. It also preserves a crucial role for ideal theory, so should be welcomed by the idealists, too. (shrink)

Expected-utility theory advances representation theorems that do not take the risk an act generates as a consequence of the act. However, a principle of expected-utility maximization that explains the rationality of preferences among acts must, for normative accuracy, take the act’s risk as a consequence of the act if the agent cares about the risk. I defend this conclusion against the charge that taking an act’s consequences to comprehend all the agent cares about trivializes the principle of expected-utility maximization.

Suppose the only difference between the effects of two actions is to whom they apply: either to parties who would -- or would not -- exist if the actions were not performed. Is this a morally significant difference? This is one of the central questions raised by the Non-Identity Problem. Derek Parfit answers no, defending what he calls the ‘No-Difference View’. I argue that Parfit is mistaken and that sometimes this difference is morally significant. I do this by formulating a (...) familiar kind of example in a new way. I make use of some findings in social psychology to help deflect counterexamples to my view. I then show how my view withstands Parfit's latest argument in favour of the No-Difference View. I conclude with a brief discussion of some questions my argument raises for consequentialist moral theory. (shrink)

This paper gives a new interpretation of the central section of Plato's Symposium (199d-212a). According to this interpretation, the term "καλóν", as used by Plato here, stands for what many contemporary philosophers call "intrinsic value"; and "love" (ἔρως) is in effect rational motivation , which for Plato consists in the desire to "possess" intrinsically valuable things - that is, according to Plato, to be happy - for as long as possible. An explanation is given of why Plato believes that "possessing" (...) intrinsically valuable things, at least for mortals like us, consists in actively creating instantiations of the intrinsic values, both in oneself and in the external world, and in knowing and loving these intrinsic values and their instantiations. Finally, it is argued that this interpretation reveals that Plato's "eudaemonism" is a different and more defensible doctrine than many commentators believe. (shrink)

Was heißt es, sich in unserer globalisierten Welt als eine vollverantwortliche Person zu verstehen und zu verhalten? Einerseits scheint es richtig, dass wir global verantwortlich sind, d.h. dass wir auch gegen entferntes Leid etwas tun sollten; andererseits aber ist wegen vielfacher Überforderungsproblemen unklar ist, wie man diese Verantwortung tatsächlich übernehmen können soll – was wiederum dagegen spricht, dass wir diese Verantwortung berechtigtermaßen zuschreiben können. Um einen Aspekt dieses großen Themas zu behandeln, konzentriere ich mich in diesem Aufsatz auf den Anwendungsbereich (...) von extremer Armut und argumentiere in folgenden Schritten. Zuerst spitze ich das Thema zu auf ein Problem, das Samuel Scheffler in diesem Zusammenhang konstatiert hat, nämlich einen Widerstreit zwischen dem, was Verantwortung unter den Bedingungen der Globalisierung bedeutet und dem, wie wir uns grundsätzlich als Handelnde zu verstehen gewohnt sind. Dann zeige ich erstens, dass dem Thema einer epistemischen Überforderung dabei entscheidendes Gewicht zugesprochen wird, zweitens jedoch, dass sich, genauer besehen, dieses Problem gar nicht in dieser Art stellt. Dafür schlage ich eine Analyse des Verantwortungsbegriffs vor, die es ermöglicht, Kriterien zu identifizieren, anhand derer gewisse Grenzen gezogen werden können, so dass die Zuschreibung der Verantwortung gerechtfertigt werden kann. (shrink)

Evidentialism is the thesis that all reasons to believe p are evidence for p. Pragmatists hold that pragmatic considerations – incentives for believing – can also be reasons to believe. Nishi Shah, Thomas Kelly and others have argued for evidentialism on the grounds that incentives for belief fail a ‘reasoning constraint’ on reasons: roughly, reasons must be considerations we can reason from, but we cannot reason from incentives to belief. In the first half of the paper, I show that this (...) argument fails: the claim that we cannot reason from incentives is either false or does not combine with the reasoning constraint to support evidentialism. However, the failure of this argument suggests an alternative route to evidentialism. Roughly, reasons must be premises of good reasoning, but it is not good reasoning to reason from incentives to belief. The second half of the paper develops and defends this argument for evidentialism. (shrink)

Epicurus argued that death can be neither good nor bad because it involves neither pleasure nor pain. This paper focuses on the deprivation account as a response to this Hedonist Argument. Proponents of the deprivation account hold that Epicurus’s argument fails even if death involves no painful or pleasurable experiences and even if the hedonist ethical system, which holds that pleasure and pain are all that matter ethically, is accepted. I discuss four objections that have been raised against the deprivation (...) account and argue that this response to Epicurus’s argument is successful once it has been sufficiently clarified. (shrink)

A clinical ethics fit for the Anthropocene—our current geological era in which human activity is the primary determinant of environmental change—needs to incorporate environmental ethics to be fit for clinical practice. Conservationist Aldo Leopold’s essay ‘The Land Ethic’ is probably the most widely-cited source in environmental philosophy; but Leopold’s work, and environmental ethics generally, has made little impression on clinical ethics. The Land Ethic holds that “A thing is right when it tends to preserve the integrity, stability, and beauty of (...) the biotic community. It is wrong when it tends otherwise.” I argue that a Land Ethic helps to re-frame problems in clinical ethics that more common philosophical approaches struggle to handle, and that it can be incorporated into clinical ethics without succumbing to “environmental fascism”. I motivate viewing problems in clinical ethics from the perspective of the ‘integrity of the biotic community’, then illustrate how this perspective can offer guidance where more commonly-invoked theories—such as consequentialism and Kantian-inspired approaches—struggle, using antimicrobial resistance in nosocomial infection as a case study. The Land Ethic equips us to understand human values as arising within and inseparable from a social-ecological context, and by treating communities as valuable in themselves rather than just through the aggregate welfare of their individual participants, we can avoid problems with the ‘repugnant conclusion’ and utility monster that plague utilitarian accounts. (shrink)

This is a discussion of how we can understand the world-view given to us by the Everett interpretation of quantum mechanics, and in particular the role played by the concept of 'world'. The view presented is that we are entitled to use 'many-worlds' terminology even if the theory does not specify the worlds in the formalism; this is defended by means of an extensive analogy with the concept of an 'instant' or moment of time in relativity, with the lack of (...) a preferred foliation of spacetime being compared with the lack of a preferred basis in quantum theory. Implications for identity of worlds over time, and for relativistic quantum mechanics, are discussed. (shrink)

In this paper I seek to clarify the role of narrative in personal unity. Examining the narrative self-constitution view developed by Marya Schechtman, I use a case of radical personal change to identify a tension in the account. The tension arises because a narrative can be regarded either to capture a continuing agent with a loosely coherent, consistent self-conception – or to unify over change and inconsistency. Two possible ways of responding, by distinguishing senses of identity or distinguishing identity and (...) autonomy, are examined, but I argue that neither precisely maps this tension. I then develop a distinction between two ways in which narrative can unify: through “bottom-up” processes related to the connection between agency and self-conception; and “top-down” processes related to self-interpretative activity. The account provides ways to resolve some criticisms of narrative theories of identity, in particular in better accounting for the role of repudiated characteristics in narrative identity. (shrink)

Peter Singer has argued that there are good utilitarian reasons for rejecting the prospect of superlongevity: developing technology to double (or more) the average human lifespan. I argue against Singer's view on two fronts. First, empirical research on happiness indicates that the later years of life are (on average) the happiest, and there is no reason to suppose that this trend would not continue if superlongevity were realized. Second, it is argued that there are good reasons to suppose that there (...) will be a certain amount of self-selection: the happiest are more likely to adopt superlongevity technology. This means that the adoption of superlongevity technology will have the effect of raising the level of aggregate utility. (shrink)

I present a proof of the quantum probability rule from decision-theoretic assumptions, in the context of the Everett interpretation. The basic ideas behind the proof are those presented in Deutsch's recent proof of the probability rule, but the proof is simpler and proceeds from weaker decision-theoretic assumptions. This makes it easier to discuss the conceptual ideas involved in the proof, and to show that they are defensible.

As reproductive genetic technologies advance, families have more options to choose what sort of child they want to have. Using preimplantation genetic diagnosis (PGD), for example, allows parents to evaluate several existing embryos before selecting which to implant via in vitro fertilization (IVF). One of the traits PGD can identify is genetic deafness, and hearing embryos are now preferentially selected around the globe using this method. Importantly, some Deaf families desire a deaf child, and PGD–IVF is also an option for (...) them. Selection for genetic deafness, however, encounters widespread disapproval in the hearing community, including mainstream philosophy and bioethics. In this paper I apply Elizabeth Barnes’ value-neutral model of disability as mere-difference to the case of selecting for deafness. I draw on evidence from Deaf Studies and Disability Studies to build an understanding of deafness, the Deaf community, and the circumstances relevant to reproductive choices that may obtain for some Deaf families. Selection for deafness, with deafness understood as mere-difference and valued for its cultural identity, need not necessitate impermissible moral harms. I thus advocate that it is sometimes morally permissible to select for deafness in one’s child. (shrink)

I consider exactly what is involved in a solution to the probability problem of the Everett interpretation, in the light of recent work on applying considerations from decision theory to that problem. I suggest an overall framework for understanding probability in a physical theory, and conclude that this framework, when applied to the Everett interpretation, yields the result that that interpretation satisfactorily solves the measurement problem. Introduction What is probability? 2.1 Objective probability and the Principal Principle 2.2 Three ways of (...) satisfying the functional definition 2.3 Cautious functionalism 2.4 Is the functional definition complete? The Everett interpretation and subjective uncertainty 3.1 Interpreting quantum mechanics 3.2 The need for subjective uncertainty 3.3 Saunders' argument for subjective uncertainty 3.4 Objections to Saunders' argument 3.5 Subjective uncertainty again: arguments from interpretative charity 3.6 Quantum weights and the functional definition of probability Rejecting subjective uncertainty 4.1 The fission program 4.2 Against the fission program Justifying the axioms of decision theory 5.1 The primitive status of the decision-theoretic axioms 5.2 Holistic scepticism 5.3 The role of an explanation of decision theory Conclusion. (shrink)

An analysis is made of Deutsch's recent claim to have derived the Born rule from decision-theoretic assumptions. It is argued that Deutsch's proof must be understood in the explicit context of the Everett interpretation, and that in this context, it essentially succeeds. Some comments are made about the criticism of Deutsch's proof by Barnum, Caves, Finkelstein, Fuchs, and Schack; it is argued that the flaw which they point out in the proof does not apply if the Everett interpretation is assumed.

I address the problem of indefiniteness in quantum mechanics: the problem that the theory, without changes to its formalism, seems to predict that macroscopic quantities have no definite values. The Everett interpretation is often criticised along these lines, and I shall argue that much of this criticism rests on a false dichotomy: that the macroworld must either be written directly into the formalism or be regarded as somehow illusory. By means of analogy with other areas of physics, I develop the (...) view that the macroworld is instead to be understood in terms of certain structures and patterns which emerge from quantum theory (given appropriate dynamics, in particular decoherence). I extend this view to the observer, and in doing so make contact with functionalist theories of mind. (shrink)

Prospective developments in computer and nanotechnology suggest that there is some possibility—perhaps as early as this century—that we will have the technological means to attempt to duplicate people. For example, it has been speculated that the psychology of individuals might be emulated on a computer platform to create a personality duplicate—an “upload.” Physical duplicates might be created by advanced nanobots tasked with creating molecule-for-molecule copies of individuals. Such possibilities are discussed in the philosophical literature as (putative) cases of “fission”: one (...) person “splitting” into two. Many philosophers, perhaps most, reject the idea of fission, appealing to some form of a “no-branching” condition to rule out such possibilities. I argue, to the contrary, that there are good moral reasons to think that any account of personal identity that does not permit fission is deeply problematic, especially in connection with theorizing about criminal punishment. I discuss and reject David Lewis’ famous account of personal identity that invokes “multiple occupancy” to allow for branching. In contrast, I offer an account of personal identity that permits branching using the type/token distinction to help with such puzzling cases. (shrink)

Brain transplant thought experiments figure prominently in the debate on personal identity. Such hypotheticals are usually taken to provide support for psychological continuity theories. This standard interpretation has recently been challenged by Marya Schechtman. Simon Beck argues that Schechtman's critique rests upon ‘two costly mistakes’—claiming that (1) when evaluating these cases, philosophers mistakenly try to figure out the intuitions that they think people inhabiting such a possible world ought to have, instead of pondering their own intuitions. Beck further asserts that (...) (2) brain transplant thought experiments cannot confirm any given theory of personal identity but rather they can only rule out theories. I argue on grounds of the social ontology of personhood that Beck has things back to front. Since our concept of personhood is shaped and informed by contingent de facto norms and structures of the natural world, and as such is heavily normatively laden, the conceptual genesis of personhood must be taken into account. This calls for constructing thought experiments as realistically as possible in order to trigger reliable intuitions. Furthermore, drawing on recent evidence from cognitive science, an empirically informed look at brain transplant thought experiments considering ‘Embodied Cognition’ reveals that Beck's arguments not only fall short for supporting psychological continuity theories, but also suggests an advantage of Schechtman's ‘Person Life View’. (shrink)

In philosophy, the criteria for personhood (PH) at a specific point in time (synchronic), and the necessary and sufficient conditions of personal identity (PI) over time (diachronic) are traditionally separated. Hence, the transition between both timescales of a person's life remains largely unclear. Personal habits reflect a decision-making (DM) process that binds together synchronic and diachronic timescales. Despite the fact that the actualization of habits takes place synchronically, they presuppose, for the possibility of their generation, time in a diachronic sense. (...) The acquisition of habits therefore rests upon PI over time; that is, the temporal extension of personal decisions is the necessary condition for the possible development of habits. Conceptually, habits can thus be seen as a bridge between synchronic and diachronic timescales of a person's life. In order to investigate the empirical mediation of this temporal linkage, we draw upon the neuronal mechanisms underlying DM; in particular on the distinction between internally and externally guided DM. Externally guided DM relies on external criteria at a specific point in time (synchronic); on a neural level, this has been associated with lateral frontal and parietal brain regions. In contrast, internally guided DM is based on the person's own preferences that involve a more longitudinal and thus diachronic timescale, which has been associated with the brain's intrinsic activity. Habits can be considered to reflect a balance between internally and externally guided DM, which implicates a particular temporal balance between diachronic and synchronic elements, thus linking two different timescales. Based on such evidence, we suggest a habit-based neurophilosophical approach of PH and PI by focusing on the empirically-based linkage between the synchronic and diachronic elements of habits. By doing so, we propose to link together what philosophically has been described and analyzed separately as PH and PI. (shrink)