We show that metric spaces and continuous functions between them are domain representable using the category of Scott-Ershov domains. A notion of effectivity for metric spaces is thereby inherited from effective domain theory. It is shown that a separable metric space with an effective metric can be represented by an effective domain. For a class of spaces, including the Euclidean spaces, the usual notions of effectivity are obtained. The Banach fixed point theorem is a consequence of the least fixed point (...) theorem for domains. A notion of semieffective domains is introduced and used to give a new proof of Ceitin's theorem. (shrink)

An algebra is effective if its operations are computable under some numbering. When are two numberings of an effective partial algebra equivalent? For example, the computable real numbers form an effective field and two effective numberings of the field of computable reals are equivalent if the limit operator is assumed to be computable in the numberings . To answer the question for effective algebras in general, we give a general method based on an algebraic analysis of approximations by elements of (...) a finitely generated subalgebra. Commonly, the computable elements of a topological partial algebra are derived from such a finitely generated algebra and form a countable effective partial algebra. We apply the general results about partial algebras to the recursive reals, ultrametric algebras constructed by inverse limits, and to metric algebras in general. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. (shrink)

In this paper, we present and defend an analysis of harm that we call the Negative Influence on Well-Being Account (NIWA). We argue that NIWA has a number of significant advantages compared to its two main rivals, the Counterfactual Comparative Account (CCA) and the Causal Account (CA), and that it also helps explain why those views go wrong. In addition, we defend NIWA against a class of likely objections, and consider its implications for several questions about harm and its role (...) in normative theorizing. (shrink)

According to the standard version of the counterfactual comparative account of harm, an event is overall harmful for an individual if and only if she would have been on balance better off if it had not occurred. This view faces the “preemption problem.” In the recent literature, there are various ingenious attempts to deal with this problem, some of which involve slight additions to, or modifications of, the counterfactual comparative account. We argue, however, that none of these attempts work, and (...) that the preemption problem continues to haunt the counterfactual comparative account. (shrink)

Suppose your evil sibling travels back in time, intending to lethally poison your grandfather during his infancy. Determined to save grandpa, you grab two antidotes and follow your sibling through the wormhole. Under normal circumstances, each antidote has a 50% chance of curing a poisoning. Upon finding young grandpa, poisoned, you administer the first antidote. Alas, it has no effect. The second antidote is your last hope. You administer it---and success: the paleness vanishes from grandpa's face, he is healed. As (...) you administered the first antidote, what was the chance that it would be effective? -/- This essay offers a systematic account of this case, and others like it. The central question is this: Given a certain time travel structure, what are the chances? In particular, I'll develop a theory about the connection between these chances and the chances in ordinary, time-travel-free contexts. Central to the account is a Markov condition involving the boundaries of spacetime regions. (shrink)

According to the “deprivation approach,” a person’s death is bad for her to the extent that it deprives her of goods. This approach faces the Lucretian problem that prenatal non-existence deprives us of goods just as much as death does, but does not seem bad at all. The two most prominent responses to this challenge—one of which is provided by Frederik Kaufman (inspired by Thomas Nagel) and the other by Anthony Brueckner and John Martin Fischer—claim that prenatal non-existence is relevantly (...) different from death. This paper criticizes these responses. (shrink)

In this article I discuss the question of whether a person’s existence can be better (or worse) for him than his non-existence. Recently, Nils Holtug and Melinda A. Roberts have defended an affirmative answer. These defenses, I shall argue, do not succeed. In different ways, Holtug and Roberts have got the metaphysics and axiology wrong. However, I also argue that a person’s existence can after all be better (or worse) for him than his non-existence, though for reasons other than those (...) provided by Holtug and Roberts. (shrink)

A prominent objection to the counterfactual comparative account of harm is that it classifies as harmful some events that are, intuitively, mere failures to benefit. In an attempt to solve this problem, Duncan Purves has recently proposed a novel version of the counterfactual comparative account, which relies on a distinction between making upshots happen and allowing upshots to happen. In this response, we argue that Purves’s account is unsuccessful. It fails in cases where an action makes the subject occupy a (...) high well-being level though one of the available alternatives would have made it even higher. In fact, it fails even in some cases where each of the available alternatives to the action that was actually performed would have made the subject’s well-being level lower. (shrink)

I raise two objections against Christian List and Peter Menzies' influential account of high-level causation. Improving upon some of Stephen Yablo's earlier work, I develop an alternative theory which evades both objections. The discussion calls into question List and Menzies' main contention, namely, that the exclusion principle, applied to difference-making, is false.

In a recent article, I criticized Anthony L. Brueckner and John Martin Fischer’s influential argument—appealing to the rationality of our asymmetric attitudes towards past and future pleasures—against the Lucretian claim that death and prenatal non-existence are relevantly similar. Brueckner and Fischer have replied, however, that my critique involves an unjustified shift in temporal perspectives. In this paper, I respond to this charge and also argue that even if it were correct, it would fail to defend Brueckner and Fischer’s proposal against (...) my critique. (shrink)

Derek Parfit famously defends a number of surprising views about "fission." One is that, in such a scenario, it is indeterminate whether I have survived or not. Another is that the fission case shows that it does not matter, in itself, whether I survive or not. Most critics of the first view contend that fission makes me cease to exist. Most opponents of the second view contend that fission does not preserve everything that matters in ordinary survival. In this paper (...) I shall provide a critique that does not rely on either of these contentions. There are other, interrelated reasons to reject Parfit's defense of the two theses. In particular, the availability of the following view creates trouble for Parfit: I determinately survive fission, but it is indeterminate which fission product I am. (shrink)

One increasingly popular approach to personal identity is called ‘animalism.’ Unfortunately, it is unclear just what the doctrine says. In this paper, I criticise several different ways of stating animalism, and put forward one formulation that I find more promising.

The counterfactual comparative account of harm (cca) faces well-known problems concerning preemption and omission. In a recent article in this journal, Daniel Immerman proposes a novel variant of cca, which he calls the worse than nothing account (wtna). According to Immerman, wtna nicely handles the preemption and omission problems. We seek to show, however, that wtna is not an acceptable account of harm. In particular, while wtna deals better than cca with some cases that involve preemption and omission, it has (...) implausible implications in other similar cases – cases that, moreover, pose no problems for cca. (shrink)

In this paper, we critically examine Molly Gardner’s favored solution to what she calls “the problem of justified harm.” We argue that Gardner’s view is false and that her arguments in support of it are unconvincing. Finally, we briefly suggest an alternative solution to the problem which avoids the difficulties that beset Gardner’s proposal.

This paper explores the possibility of moral conflict in Kant’s ethics. An analysis of the only explicit discussion of the topic in his published writings confirms that there is no room for genuine moral dilemmas. Conflict is limited to nonconclusive ‘grounds’ of obligation. They arise only in the sphere of ethical duty and, though defeasible, ought to be construed as the result of valid arguments an agent correctly judges to apply in the situation at hand. While it is difficult to (...) determine in theory what makes some of them stronger than others, these ‘grounds’ can account for practical residue in conflict cases and for a plausible form of agent regret. The principle that ‘ought implies can’ survives intact. (shrink)

John Martin Fischer and Anthony L. Brueckner have argued that a person’s death is, in many cases, bad for him, whereas a person’s prenatal non-existence is not bad for him. Their suggestion relies on the idea that death deprives the person of pleasant experiences that it is rational for him to care about, whereas prenatal non-existence only deprives him of pleasant experiences that it is not rational for him to care about. In two recent articles in The Journal of Ethics, (...) I have objected that it is irrelevant what it is in fact rational for the person to care about. Fischer and Brueckner have replied to my critique. In this paper I respond to their latest pair of replies. (shrink)

Is Kant’s ethical theory too demanding? Do its commands ask too much of us, either by calling for self-sacrifice on particular occasions, or by pervading our lives to the extent that there is no room for permissible action? In this article, I argue that Kant’s ethics is very demanding, but not excessively so. The notion of ‘latitude’ does not help. But we need to bear in mind that moral laws are self-imposed and cannot be externally enforced; that ‘right action’ is (...) not a category of Kantian ethics – there is a more and a less, and lack of perfection does not entail vice; and that only practice makes perfect, i.e. how much virtue can realistically be expected can vary from agent to agent. The principle that ‘ought’ is limited by ‘can’ is firmly entrenched in Kant’s ethical thought. (shrink)

There seems to be a strong sentiment in pre-philosophical moral thought that actions can be morally valuable without at the same time being morally required. Yet Kant, who takes great pride in developing an ethical system firmly grounded in common moral thought, makes no provision for any such extraordinary acts of virtue. Rather, he supports a classification of actions as either obligatory, permissible or prohibited, which in the eyes of his critics makes it totally inadequate to the facts of morality. (...) The related idea of uncommonly grand and noble deeds is frequently dismissed by Kant as high-.own emotional nonsense. Such considerations give rise to the fear that actions intuitively classed as morally commendable but not required must be re-classified as commands of duty by Kant, making his ethical theory as unbearably demanding as direct utilitarianism. The paper divides into three sections: (1) an examination of the nature of moral goodness from a meta-ethical angle that introduces some passages from Kant's writings presenting strong theoretical evidence against the case for supererogatory action; (2) a critique of Thomas Hill's suggestion that within the category of wide duty we can accommodate some of the main features of actions classified as supererogatory in other ethical systems; concluding that, contra Hill, there are no actions of wide duty that can be so characterized in any significant sense; and (3) a final discussion of the problem of how demanding the requirements of Kantian ethical theory really are. (shrink)

A pure time preference is a preference for something to occur at one point in time rather than another, merely because of when it occurs in time. Such preferences are widely regarded as paradigm examples of irrational preferences. However, Rosemary Lowry and Martin Peterson have recently argued that, for instance, a pure time preference to go to the opera tonight rather than next month may be rationally permissible, even if the amounts of intrinsic value realized in both cases are identical. (...) In this reply, we argue that Lowry and Peterson's argument is unsuccessful. (shrink)

Das Buch behandelt Kants Versuch, innerhalb seiner Ethik Sittengesetz, Naturgesetz und Freiheit im moralischen Handeln in Einklang zu bringen. Im ersten Teil stehen die Begriffe der Freiheit und des Willens bei Kant im Mittelpunkt. Der zweite Teil untersucht detailliert die Kernpunkte der kantischen Ethik: den (letztlich gescheiterten) Versuch, Freiheit und Naturkausalit t auszus hnen, und die Theorie des Handelns nach Moralgesetzen, deren Wahl den freien Willen als eigentliches Moment ausmacht. Am Ende steht die Einsicht in ein hoch entwickeltes, differenziertes gedankliches (...) System, das unserer Alltagsauffassung von moralischer Verantwortung erstaunlich nahe kommt. (shrink)

pt. I. Institutions, professions and ideas -- pt. II. Human science and human nature -- pt. III. The art of knowing.

Abstract: The symmetry argument is an objection to the 'deprivation approach'– the account of badness favored by nearly all philosophers who take death to be bad for the one who dies. Frederik Kaufman's recent response to the symmetry argument is a development of Thomas Nagel's suggestion that we could not have come into existence substantially earlier than we in fact did. In this paper, I aim to show that Kaufman's suggestion fails. I also consider several possible modifications of his theory, (...) and argue that they are unsuccessful as well. (shrink)

The present article is an attempt to clarify the Kantian conception of duties to the self and to defend them against common objections. Kant’s thesis that all duty rests on duties to the self is shown to follow from the autonomy of the human will; and the allegation that they are impossible because the agent could always release himself from such a duty turns out to be question-begging. There is no attempt to prove that there are such duties, but they (...) are revealed to be an indispensable part of morality. Traditional attributes of moral commands, such as ‘categoricity’ or ‘overridingness’ make no sense in a one-sidedly other-regarding or social conception of morality. (shrink)

IntroductionIf we were to identify the beginning of the study of visual argumentation, we would have to choose 1996 as the starting point. This was the year that Leo Groarke published “Logic, art and argument” in Informal logic, and it was the year that he and David Birdsell co-edited a special double issue of Argumentation and Advocacy on visual argumentation . Among other papers, the issue included Anthony Blair’s “The possibility and actuality of visual arguments”. It was also the year (...) that Gail J. Chryslee, Sonja K. Foss and Arthur L. Ranney published their short text on “The construction of claims in visual argumentation” , stating that even though theorists may know a great deal about the process of argumentation, “virtually none of this knowledge is applicable to visual argumentation […] because of the properties that distinguish visual imagery from discursive symbols” .Texts on visual rhetoric have been written as far back as the early 1980s, .. (shrink)

Kant’s concept of conscience has been largely neglected by scholars and contemporary moral philosophers alike, as has his concept of “indirect” duty. Admittedly, neither of them is foundational within his ethical theory, but a correct account of both in their own right and in combination can shed some new light on Kant’s moral philosophy as a whole. In this paper, I first examine a key passage in which Kant systematically discusses the role of conscience, then give a systematic account of (...) “indirect” duties and the function of hypothetical imperatives in the course of their generation. I then turn to the possibility of moral error and the part “indirect” duty can play in its prevention. In conclusion, I try to show how clarifying the concept of “indirect” duty can help us to shed light on the nature of Kantian ethics as a whole. (shrink)

According to luck egalitarianism, it is not unfair when people are disadvantaged by choices they are responsible for. This implies that those who are disadvantaged by choices that prevent disadvantage to others are not eligible for compensation. This is counterintuitive. We argue that the problem such cases pose for luck egalitarianism reveals an important distinction between responsibility for creating disadvantage and responsibility for distributing disadvantage which has hitherto been overlooked. We develop and defend a version of luck egalitarianism which only (...) holds people responsible for creating disadvantage. This revision enables luck egalitarianism to offer compensation to those who are disadvantaged by preventing disadvantage to others, like dependent caretakers, without compromising the responsibility–sensitivity at the heart of luck egalitarianism. (shrink)

According to the “deprivation approach,” a person’s death is bad for her to the extent that it deprives her of goods. This approach faces the Lucretian problem that prenatal non-existence deprives us of goods just as much as death does, but does not seem bad at all. The two most prominent responses to this challenge—one of which is provided by Frederik Kaufman and the other by Anthony Brueckner and John Martin Fischer—claim that prenatal non-existence is relevantly different from death. This (...) paper criticizes these responses. (shrink)

The aim of this paper is to settle the controversy around Kant’s notorious discussion of maternal infanticide in the ‘Doctrine of Right’ of 1797. How should a state punish an unmarried mother who has killed her newborn infant? The text (at DoR VI 335–37) is obscure. Three readings have been defended in the literature: 1. Lenience. Maternal infanticide does not count as murder; so, capital punishment is inappropriate. On this view, the child does not enjoy the full recognition of the (...) law (this is the standard view). 2. Temporary privilege. Lenience should prevail as long as social attitudes are barbaric and treating maternal infanticide like regular cases of murder is perceived to be unjust. The regular punishment for murder will be appropriate once sexual mores have changed. The child will then enjoy the full protection of the law (Hruschka, Varden). 3. No lenience. Capital punishment, though it appears to be unjust, is actually just and ought to be applied. Any child, whether born to married parents or not, enjoys the full protection of the law (Brandt, Uleman). Based on a close examination of the passage and the context of contemporary laws and attitudes, Kant is not, it will be argued, advocating lenience but certain legislative reforms, which are needed to dispel the perception that capital punishment is unjust. Progressive legislation will change social attitudes, not vice versa. Moreover, it will be shown that Kant does not, appearances notwithstanding, endorse the thesis that a child born out of wedlock has been smuggled into the state like ‘prohibited goods’ or ‘contraband merchandise’, which would deprive the child of the protection of the state; that is the view with which Kant saddles Cesare Beccaria. (shrink)

In his recent book, Death and the Afterlife, Samuel Scheffler argues that it matters greatly to us that there be other human beings long after our own deaths. In support of this “Afterlife Thesis,” as I call it, he provides a thought experiment—the “doomsday scenario”—in which we learn that, although we ourselves will live a normal life span, 30 days after our death the earth will be completely destroyed. In this paper I question this “doomsday scenario” support for Scheffler’s Afterlife (...) Thesis. In particular, I suggest that Scheffler has underestimated the importance of a good ending. (shrink)

Pauline Kleingeld’s “Contradiction and Kant’s Formula of Universal Law”, published in this journal in 2017, presents a powerful challenge to what has become the standard reconstruction of the categorical imperative. In this response to Kleingeld, I argue that she is right to emphasise the ‘simultaneity requirement’ - that we must be able to will a proposed maxim and ‘simulataneously’, ‘also’ or ‘at the same time’ the maxim in its universalised form - but I deny that this removes the categorical imperative (...) test from the world of universalisation because the agent must be understood as part of that world. There are two distinct types of conflict: a contradiction that results from non-universalisability and Kleingeld’s ‘volitional’ conflict, located within the will of the immoral agent. The standard ‘practical’ reconstruction of the categorical imperative remains largely intact. (shrink)

Daniel Immerman has recently put forward a novel account of harm, the Worse than Nothing Account. We argue that this account faces fatal problems in cases in which an agent performs several simultaneous actions. We also argue that our criticism is considerably more powerful than another one that has recently been advanced.

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

Some forms of argumentation are best performed through words. However, there are also some forms of argumentation that may be best presented visually. Thus, this paper examines the virtues of visual argumentation. What makes visual argumentation distinct from verbal argumentation? What aspects of visual argumentation may be considered especially beneficial?

This article defends three claims. First, that collection and division in the Phaedrus are described as procedures that underlie human speaking and thinking in general, as well as philosophical inquiry, and are not identified with either. Second, that what sets the dialectical use of these procedures apart from their ordinary use are philosophical suppositions independent of the procedures of collection and division themselves; for that reason, collection and division cannot be identified with dialectic as such. Third, that the second part (...) of the Phaedrus is concerned with the broader question how noble or beautiful speaking, in general, may be said to depend on dialectic as much as it is concerned with the question how rhetoric, as a kind of expertise, is related to dialectic. (shrink)

Even the most sympathetic readers of Kant's moral philosophy usually disagree with him about some aspect of his theory, or some particular moral judgement. His unqualified condemnation of lying in the essay ‘On a supposed right to lie from philanthropy’ is a classical case in question, as is his strong endorsement of retributive justice and the death penalty. A third prominent source of discontent are Kant's repeated verdicts on the moral status of non-human animals, or rather the lack thereof. For, (...) despite the fact that his practical recommendations in this field are sensible and even progressive, he repeatedly insists that there are no direct duties to animals, that the well-being of animals is morally indifferent, in particular that we ought to treat animals decently solely for the sake of humanity. As a result, the foundations of his advice seem morally inadequate, even offensive. (shrink)

The counterfactual comparative account of harm has counterintuitive implications in cases involving overdetermination and preemption. A popular strategy for dealing with these problems appeals to plural harm—several events being jointly harmful. Björn Petersson criticizes this strategy on the grounds that it conflicts with a strong intuition that helps to motivate the counterfactual comparative account, namely, that harming someone essentially involves making a difference for the worse for her. In this paper, I argue that Petersson’s argument is unconvincing.

Chris Heathwood has recently put forward a novel and ingenious argument against the view that intrinsic value is analyzable in terms of fitting attitudes. According to Heathwood, this view holds water only if the related but distinct concept of welfare—intrinsic value for a person —can be analyzed in terms of fitting attitudes too. Moreover, he argues against such an analysis of welfare by appealing to the rationality of our bias towards the future. In this paper, I argue that so long (...) as we keep the tenses and the intrinsic/extrinsic distinction right, the fitting-attitudes analysis of welfare can be shown to survive Heathwood’s criticism. (shrink)

This paper critically examines Timothy Williamson’s claim that knowledge figures essentially in explanations of behavior. Since this claim implies that knowledge is causally efficacious in bringing about actions, it plays a key role in Williamson’s case for knowledge being a mental state. I first discuss a central example of Williamson, in which a burglar ransacks a house. I dispute Williamson’s claim that the best explanation of the burglar’s behavior invokes the burglar’s state of knowledge as he enters the house, by (...) arguing that there is a better explanation that only mentions the burglar’s beliefs. Since the reasons that explain the superiority of my proposed explanation generalize, I conclude that one does not have to invoke a subject’s state of knowledge to explain behavior. Nevertheless, Williamson’s explanation is superior to belief-based explanations if one only considers facts that obtain before the action takes place. In the final part of the paper, I argue that this fact does not help Williamson’s case for considering knowledge as a mental state. (shrink)

In defense of the Deprivation Approach to the badness of death against the Lucretian objection that death is relevantly similar to prenatal nonexistence, John Martin Fischer and Anthony L. Brueckner have suggested that whereas death deprives us of things that it is rational for us to care about, prenatal nonexistence does not. I have argued that this suggestion, even if correct, does not make for a successful defense of the Deprivation Approach against the Lucretian objection. My criticism involved a thought (...) experiment in which a person avoids being tortured. Recently, Taylor Cyr has defended Fischer and Brueckner’s approach, arguing that my thought experiment is incoherent. In this response, I question both the truth and relevance of Cyr’s incoherence claim. (shrink)