A debate has simmered concerning the nature of clinical reasoning, especially diagnostic reasoning: Is it a “science” or an “art”? The trend since the seventeenth century has been to regard medical reasoning as scientific reasoning, and the most advanced clinical reasoning is the most scientific. However, in recent years, several scholars have argued that clinical reasoning is clearly not “science” reasoning, but is in fact a species of narratival or hermeneutical reasoning. The study reviews this dispute, and argues that in (...) a theoretical sense, the dispute rests upon a naïve—but very popular—caricature of what constitutes “science reasoning.” But, if the dispute rests upon just such a caricature, why is it so persistent? The study concludes by suggesting that we, as patients and as physicians, have deep psychological tendencies that incline us to adopt the very naïve “science” concept/model of diagnostic reasoning, even if (or when) we understand its inaptness. (shrink)

Cities are mysteriously attractive. The more we get used to being citizens of the world, the more we feel the need to identify ourselves with a city. Moreover, this need seems in no way distressed by the fact that the urban landscape around us changes continuously: new buildings rise, new restaurants open, new stores, new parks, new infrastructures… Cities seem to vindicate Heraclitus’s dictum: you cannot step twice into the same river; you cannot walk twice through the same city. But, (...) as with the river, we want and need to say that it is the same city we are walking through every day. It is always different, but numerically self-identical. How is that possible? What sort of mysterious thing is a city? The answer, I submit, is that cities aren’t things. They are processes. Like rivers, cities unfold in time just as they extend in space, by having different temporal parts for each time at which they exist. And walking though one part and then again through another is, literally, walking through the same whole. (shrink)

In times of digitalization and globalization, social expectations change at an increasing pace. In order to provide orientation in times of frequent change, this article argues to reinforce the meaning of moral principles, norms, or values as focal points, which build the basis of mutually aligned behavioral expectations. Accordingly, the paper explains the abstract meaning of focal points – having reciprocal expectations as foundation for social cooperation – as well as the particular relevance of the focal point ‘do no harm’.

I argue that Hume’s philosophy of time is relationist in the following two senses. 1) Standard definition of relationism. Time is a succession of indivisible moments. Hence there is no time independent of change. Time is a relational, not substantial feature of the world. 2) Rigid relationism. There is no evidence of uniform natural standard for synchronization of clocks. No absolute temporal metric is available. There are countless times, and no time is privileged. Combining 1) and 2) shows that Hume’s (...) ontology of time is thoroughly relationist. (shrink)

To promise someone to do something is to commit oneself to that person to do that thing, but what does that commitment consist of? Some think a promissory commitment is an obligation to do what’s promised, and that while promising practices facilitate the creation of promissory obligations, they are not essential to them. I favor the broadly Humean view in which, when it comes to promises (and so promissory obligations), practices are of the essence. I propose the Practice Reason Account (...) of promises, according to which a promise is basically to give oneself a self-interested practice reason to do what’s promised. One achieves this feat by invoking self-enforcing independent practice rules thanks to which one’s doing what’s promised preserves one’s promissory trust(worthiness) and promising power. However, nothing in this account supports the Hume-Rawls claim that promise-keeping or promise-breaking is right just when and because it conforms to practice rules that are justified by their good- or right-making properties. (shrink)

Argues, against Anscombe, that Aristotle had the concept of morality as an interpersonal normative order: morality is justice in general. For an action to be wrong is not for it to warrant blame, or to wrong another person, but to be something one should not do that one has no right to do. In the absence of rights, morality makes no sense.

With the growing focus on prevention in medicine, studies of how to describe risk have become increasing important. Recently, some researchers have argued against giving patients “comparative risk information,” such as data about whether their baseline risk of developing a particular disease is above or below average. The concern is that giving patients this information will interfere with their consideration of more relevant data, such as the specific chance of getting the disease (the “personal risk”), the risk reduction the treatment (...) provides, and any possible side effects. I explore this view and the theories of rationality that ground it, and I argue instead that comparative risk information can play a positive role in decision-making. The criticism of disclosing this sort of information to patients, I conclude, rests on a mistakenly narrow account of the goals of prevention and the nature of rational choice in medicine. (shrink)

In the part of the first Critique known as “The Paralogisms of Pure Reason” Kant seeks to explain how even the most acute metaphysicians could have arrived, through speculation, at the ruefully dogmatic conclusion that the self (understood as the subject of thoughts or "thinking I") is a substance. His diagnosis has two components: first, the positing of the phenomenon of “Transcendental Illusion”—an illusion, modelled on but distinct from, optical illusion--that predisposes human beings to accept as sound--and as known to (...) sound--certain in fact flawed arguments for substantive theses about the nature of the self; second, the identification of the fallacy we commit when we succumb to this illusion. It is explained how these two elements combine to produce a central instance of (what Kant sees as) dogmatic speculative metaphysics, namely, the doctrine that the self is a substance in the sense of a necessarily non-inhering subject of inherence. It is argued that Kant has a novel, ingenious, and even somewhat plausible account of the route by which the rational psychologist arrives--or might arrive--at this view, an account that involves identifying a rather deep-rooted confusion about the very nature of conceivability. (shrink)

Conventionalism as a distinct approach to the social contract received significant attention in the game-theoretic literature on social contract theory. Peter Vanderschraaf’s sophisticated and innovative theory of conventional justice represents the most recent contribution to this tradition and, in many ways, can be viewed as a culmination of this tradition. In this article, I focus primarily on Vanderschraaf’s defense of the egalitarian bargaining solution as a principle of justice. I argue that one particular formal feature of this bargaining solution, the (...) baseline consistency requirement, may stand in tension with other features of conventionalism as an approach to the social contract and limit the scope of Vanderschraaf’s theory to societies in which de facto an egalitarian sense of justice evolves. It limits the scope of Vanderschraaf’s theory in the face of moral diversity. A similar limitation applies to Vanderschraaf’s theory of democratic political authority. Despite these minor limitations, Vanderschraaf’s theory can only be seen as a major success and significant contribution to social contract theory. (shrink)

In the first Enquiry, Hume takes the experience of exerting force against a solid body to be a key ingredient of the vulgar idea of power, so that the vulgar take that experience to provide us with an impression of power. Hume provides two arguments against the vulgar on this point: the first concerning our other applications of the idea of power and the second concerning whether that experience yields certainty about distinct events. I argue that, even if we accept (...) Hume’s conception of the vulgar’s approach, neither of Hume’s arguments succeeds. The first argument can be resisted either by using the very arguments Hume provides concerning other causal representations or by simply rejecting Hume’s strict empiricism. The second argument can be resisted on epistemological grounds: there is no reason to think that an experience of a maximally-strong metaphysical connection would provide a maximally-strong epistemological connection. Unlike some recent neo-Anscombean responses to the second argument, my response does not require challenging Hume’s view that causal relations are strictly necessary. Though I do not attempt to translate the resilience of the vulgar view into contemporary terms, the failure of Hume’s arguments challenges one of the long-standing motivations for Humean approaches to causation. (shrink)

The paper advances a Humean metaethical analysis of "intrinsic value" - a notion fundamental in moral philosophy in general and particularly so in environmental ethics. The analysis reduces an object's moral properties (e.g., its value) to the empirical relations between the object's natural properties and people's psychological dispositions to respond to them. Moral properties turn out to be both objective and subjective, but in ways compatible with, and complementary to, each other. Next, the paper investigates whether the Humean analysis can (...) support non-anthropocentric environmental ethical theories, which attribute intrinsic value to nonhuman natural entities. It argues that one of the most useful resources from Hume for non-anthropocentrism is his account of justice as an artificial virtue, which is a plausible model for the internalization of various environmentally friendly conventions and the creation of environmental values. Finally, the paper concludes that any Humean account of intrinsic value is empiricist all the way down. Moral questions about what things are intrinsically valuable, and to what extent they are so, are ultimately empirical questions about complex psychological capacities and dispositions of human beings, which cannot be single-handedly answered by philosophers a priori; and that ethics is more appropriately seen as an interdisciplinary investigation, requiring collaboration among the various psychological and social sciences, human biological and neurological sciences, and history and philosophy. (shrink)

In this paper we argue that transparency of machine learning algorithms, just as explanation, can be defined at different levels of abstraction. We criticize recent attempts to identify the explanation of black box algorithms with making their decisions (post-hoc) interpretable, focusing our discussion on counterfactual explanations. These approaches to explanation simplify the real nature of the black boxes and risk misleading the public about the normative features of a model. We propose a new form of algorithmic transparency, that consists in (...) explaining algorithms as an intentional product, that serves a particular goal, or multiple goals (Daniel Dennet’s design stance) in a given domain of applicability, and that provides a measure of the extent to which such a goal is achieved, and evidence about the way that measure has been reached. We call such idea of algorithmic transparency “design publicity.” We argue that design publicity can be more easily linked with the justification of the use and of the design of the algorithm, and of each individual decision following from it. In comparison to post-hoc explanations of individual algorithmic decisions, design publicity meets a different demand (the demand for impersonal justification) of the explainee. Finally, we argue that when models that pursue justifiable goals (which may include fairness as avoidance of bias towards specific groups) to a justifiable degree are used consistently, the resulting decisions are all justified even if some of them are (unavoidably) based on incorrect predictions. For this argument, we rely on John Rawls’s idea of procedural justice applied to algorithms conceived as institutions. (shrink)

This paper argues that the rules that constitute a market protect autonomy and increase welfare in healthcare. Markets do the former through protecting rights to self-ownership and a cluster of rights that protect its exercise. Markets protect welfare by organizing and protecting trades. In contrast, prohibition destroys legitimate markets, giving rise to so-called black markets that harm both the autonomy and well-being of agents. For example, a fee-for-service medical system is a highly developed and specialized market. It is individuals working (...) together, through the division of labor, to provide mutual insurance. This coordination, and the benefits it makes possible, is not possible without injunctions against harm. Prohibitions on harm are not mere ethical niceties, they are practice rules for both healthcare and markets. Placing the doctor within a healthcare market actually reinforces the doctor’s moral obligation, and the legal enforcement of that obligation, not to harm. Similarly, markets reinforce patient rights to self-determination through legal and institutional enforcement of the harm principle in the form of the protection of certain basic welfare rights to life, bodily integrity, property, trade, and contract. Since the establishment of markets protects agent autonomy and welfare, and prohibition directly harms the same, there are strong reasons for establishing markets to protect trade in precisely those areas where autonomy and well-being are most vulnerable to exploitation, for example, the trade in human kidneys. (shrink)

I motivate a dilemma to show that nothing can be obligatory for anyone regardless of whether determinism or indeterminism is true. The deterministic horn, to which prime attention is directed, exploits the thesis that obligation requires freedom to do otherwise. Since determinism precludes such freedom, it precludes obligation too. The indeterministic horn allows for freedom to do otherwise but assumes the burden of addressing whether indeterministically caused choices or actions are too much of a matter of luck to be obligatory (...) for anyone. I critically discuss a response to the deterministic horn that invokes the distinction between alternatives compatible with determinism and those incompatible with determinism. (shrink)

The practice-dependent approach to justice has received a lot of attention in post-millennium political philosophy. It has been developed in different directions and its normative implications have been criticized, but little attention has been directed to the very distinction between practice-dependence and practice-independence and the question of what theoretically differentiates a practice-dependent account from mainstream practice-independent accounts. The core premises of the practice-dependent approach, proponents argue, are meta-normative and methodological. A key feature is the presumption that a concept of justice (...) is dependent on the function or aim of the social practices to which it is supposed to be applied. Closely related to this meta-normative thesis is an interpretive methodology for deriving principles of justice from facts about existing practices, in particular regarding their point and purpose. These two premises, practice-dependent theorists claim, differentiate their account since they are not accepted by practice-independent accounts and they justify different principles of justice than practice-independent accounts. Our aim in this article is to refute both and, demonstrating that practice-independent accounts may indeed accept the meta-normative and methodological premises of the practice-dependent accounts, and that we are given no theoretical reason to think that practice-dependent accounts justify other principles of justice for a practice than do practice-independent accounts. In other words, practice-dependent theorists have not substantiated their claim that practice-dependence is theoretically differentiated from mainstream accounts. When practice-dependent proponents argue for other principles of justice than mainstream theorists, it will be for the usual reason in normative theory: their first-order normative arguments differ. (shrink)

In “Hume and Julius Caesar,” G.E.M. Anscombe argues that some historical claims, such as “Julius Caesar was assassinated,” serve as touchstones for historical knowledge. Only Cartesian doubt can call them into question. I examine her reasons for thinking that the discipline of history must be grounded in claims that it is powerless to discredit. I argue that she is right to recognize that some historical claims are harder to dislodge than others, but wrong to contend that any are invulnerable to (...) non-Cartesian doubt. (shrink)

In this paper, I argue that Imre Lakatos’s account on the relation between the history and the philosophy of science, if properly understood and also if properly modified, can be valuable for the philosophical comprehension of the relation between the history and the philosophy of science. The paper is divided into three main parts. In the first part, I provide a charitable exegesis of the Lakatosian conception of the history of science in order to show that Lakatos’s history cannot be (...) a caricature. In the second part, I describe what I believe are the real problems of Lakatos’s account on a metaphysical and on a methodological level. In order to address these problems, I take advantage of the recent critique of the so-called “confrontation model”. Finally, in the third part, I suggest that a proper modification of Lakatos’s perspective can resolve the aforementioned problems without distorting Lakatos’s central aspiration, which is that the philosophical theories of scientific rationality can be assessed with the help of the history of science without losing their normative content. (shrink)

Kantian moral theories must explain how their most basic moral values of dignity and autonomy should be interpreted and applied to human conditions. One place Kantians should look for inspiration is, surprisingly, the utilitarian tradition and its emphasis on generally accepted, informally enforced, publicly known moral rules of the sort that help us give assurances, coordinate our behavior, and overcome weak wills. Kantians have tended to ignore utilitarian discussions of such rules mostly because they regard basic moral principles as a (...) priori requirements that cannot be tailored to human foibles and limitations. I argue that Kantian moral theories should incorporate public moral rules as mid-level moral requirements for embodied and socially embedded human agents. I explain how certain specific moral judgments about how we ought to act are justified by public moral rules, which are themselves justified by more fundamental moral requirements. (shrink)

Abstract I argue that the two primary motivations in the literature for positing seemings as sui generis mental states are insufficient to motivate this view. Because of this, epistemological views which attempt to put seemings to work don’t go far enough. It would be better to do the same work by appealing to what makes seeming talk true rather than simply appealing to seeming talk. Content Type Journal Article Pages 1-12 DOI 10.1007/s11406-012-9363-8 Authors T. Ryan Byerly, Department of Philosophy, Baylor (...) University, Waco, TX, USA Journal Philosophia Online ISSN 1574-9274 Print ISSN 0048-3893. (shrink)

Social contract theorists often take the ideal contract to be the agreement or bargain individuals would make in some privileged choice situation. Recently, experimental philosophers have explored this kind of decision-making in the lab. One rather robust finding is that the exact circumstances of choice significantly affect the kinds of social arrangements experimental subjects unanimously endorse. Yet prior work has largely ignored the question of which of the many competing descriptions of the original position subjects find most compelling. This paper (...) aims to address this gap, exploring how attractive experimental subjects find various characterizations of these circumstances of choice. We find evidence suggesting that no one choice situation can fulfill the role that social contract theorists have hoped it would play. We also find that, contrary to what some prominent social contract theorists have expected, there is no robust relationship between an individual’s ranking of distributive principles and their ranking of various descriptions of the original position. In conclusion, we discuss the broader implications of these results for political philosophy. (shrink)

Philosophers and social scientists have recently turned to game theory and agent-based models to better understand social contract formation. The stag hunt game is an idealization of social contract formation. Using the stag hunt game, we attempt to determine what, if any, barrier diversity is to the formation of an efficient social contract. We uncover a deep connection between tolerance, diversity, and the social contract. We investigate a simple model in which individuals possess salient traits and behave cooperatively when the (...) difference between their trait and the trait of their counterpart is less than their ‘tolerance level’. If traits are fixed and correspond to permanent or semipermanent features of the individual, such as religion or race, social contract formation is a remote possibility. If traits are malleable, social contract formation is possible but comes at the steep cost of diversity and tolerance, that is, individuals are unwilling to cooperate with those much different from themselves. Yet homogeneity and intolerance are not a long-term feature of the population. Over time mutations allow for increasingly tolerant agents to prosper, thereby ushering in trait diversity. In the end, all reap the benefits of cooperation. (shrink)

The problem of amodal perception is the problem of how we represent features of perceived objects that are occluded or otherwise hidden from us. Bence Nanay (2010) has recently proposed that we amodally perceive an object's occluded features by imaginatively projecting them into the relevant regions of visual egocentric space. In this paper, I argue that amodal perception is not a single, unitary capacity. Drawing appropriate distinctions reveals amodal perception to be characterized not only by mental imagery, as Nanay suggests, (...) but also by genuinely visual representations as well as beliefs. I conclude with some brief remarks on the role of object-directed bodily action in conferring a sense of unseen presence on an object's occluded features. (shrink)

This article undertakes a comparative study of the conjectural histories of Jean-Jacques Rousseau and Adam Ferguson, focusing on the convergences in the moral and political ideals expressed and grounded in these histories. In comparison with Scots like Adam Smith and John Millar, the conjectural histories of Ferguson and Rousseau follow a similar historical trajectory as regards the development and progress of commercial, political and cultural arts. However, their assessment of the moral progress of humanity does not, or in a much (...) more limited way than in Smith and Millar, correlate with this trajectory. Rousseau and Ferguson see a candour and vigour in savage and barbarian societies that is much less easily supported by the complex socio-economic framework of modern, commercial societies. It is argued that the convergences in their conjectural histories arise from a similar fusion of these histories with Stoic and republican perspectives. While Rousseau and Ferguson do not see history as cyclical, they think that the forces that push towards moral decline are strong and can, on the political level, only be countered by firm republican policies. Furthermore, their shared Stoic ideal of the life lived according to nature informs their solutions for modern societies. (shrink)

This paper attempts to answer the question of what defines mnemonic confabulation vis-à-vis genuine memory. The two extant accounts of mnemonic confabulation as “false memory” and as ill-grounded memory are shown to be problematic, for they cannot account for the possibility of veridical confabulation, ill-grounded memory, and wellgrounded confabulation. This paper argues that the defining characteristic of mnemonic confabulation is that it lacks the appropriate causal history. In the confabulation case, there is no proper counterfactual dependence of the state of (...) seeming to remember on the corresponding past representation. (shrink)

Episodic memory (memories of the personal past) and prospecting the future (anticipating events) are often described as mental time travel (MTT). While most use this description metaphorically, we argue that episodic memory may allow for MTT in at least some robust sense. While episodic memory experiences may not allow us to literally travel through time, they do afford genuine awareness of past-perceived events. This is in contrast to an alternative view on which episodic memory experiences present past-perceived events as mere (...) intentional contents. Hence, episodic memory is a way of coming into experiential contact with, or being again aware of, what happened in the past. We argue that episodic memory experiences depend on a causal-informational link with the past events being remembered, and that, assuming direct realism about episodic memory experiences, this link suffices for genuine awareness. Since there is no such link in future prospection, a similar argument cannot be used to show that it also affords genuine awareness of future events. Constructivist views of memory might challenge the idea of memory as genuine awareness of remembered events. We explain how our view is consistent with both constructivist and anti-causalist conceptions of memory. There is still room for an interpretation of episodic memory as enabling genuine awareness of past events, even if it involves reconstruction. (shrink)

I describe a distinctive kind of fear that is generated by a vivid recognition of one’s mortal nature. I name it ‘existential shock’. This special fear does not take our future annihilation as any kind of harm, whether intrinsic or extrinsic. One puzzling feature of existential shock is that it is experienced as disclosing an important truth, yet attempts to specify this revelatory content bring us back to familiar facts about one’s inevitable death. But how can I discover something that (...) I already knew? I argue that in our everyday lives, we are in the grip of deeply entrenched patterns of thought and feeling that prevent the knowledge of our mortality from being fully assimilated. Rather, we merely ‘pay lip service’ to the facts of our mortality. I propose that existential shock involves a distinctive mode of presentation of oneself as a mortal being, in a way that cuts through subtle layers of denial that govern our lives. I develop this thesis by utilizing and synthesizing ideas from several traditions, including the work of Samuel Scheffler, Mark Johnston, Martin Heidegger, and Jay L. Garfield. (shrink)

Empathy is intersubjective in that it connects us mentally with others. Some theorists believe that by blurring the distinction between self and other empathy can provide a radical form of altruism that grounds all of morality and even a kind of immortality. Others are more pessimistic and maintain that in distorting the distinction between self and other empathy precludes genuine altruism. Even if these positions exaggerate self-other merging, empathy’s intersubjectivity can perhaps ground ordinary altruism and the rational recognition that one (...) shouldn’t arbitrarily privilege oneself over others. [Note: This volume won CHOICE's Outstanding Academic Title of the Year 2018.]. (shrink)

In this thesis, I argue that David Hume’s political philosophy is centrally focused on the prospect of social reform. The conception of justice and politics he develops out of his theories of virtue and moral psychology stresses the pervasive effects of institutions on individuals’ abilities to live decent lives and provides criteria for determining the relative success of such institutions. While Hume’s political philosophy has been interpreted as justifying a society’s status quo, I demonstrate that the principles of merit, need, (...) and equality—commonly considered core principles of social justice—each play a vital role in his view of what constitutes a healthy, stable society. In particular, I contend that Hume’s emphasis on institutions guaranteeing equal protection of basic rights, the role of the common good in the moral justification of political institutions, and the material and social circumstances of equality that make the institution of justice possible, suggest that social reform is a central concern of his theory of justice and politics. (shrink)

In this dissertation, I address the question of how to construct scientific theories of emotions that are both conceptually sound and empirically fruitful. To do this, I offer an analysis of the main challenges scientific theories of emotions face, and I propose a meta-theoretical framework to construct scientific concepts of emotions as explications of folk emotion concepts. Part I discusses the main challenges theories of emotions in psychology and neuroscience encounter. The first states that a proper scientific theory of emotions (...) must explain all and only the phenomena under the vernacular term ‘emotion’ with a common set of conceptual resources and under an overarching generic concept of emotion. The second demands that each emotion category corresponds to well-coordinated sets of neural, physiological, and behavioral patterns of responses. I argue that none of the best contemporary theories of emotions in psychology and neuroscience overcomes these challenges. As a result, a new theory of emotions is required. In Part II, I develop the meta-theoretical framework to construct a theory of emotions that overcomes the challenges above. First, I propose a pluralistic account of scientific kinds based on different patterns of projection that various disciplines may take to justify inductive inferences. These are essentialist, historical, and social patterns. Each of these patterns provides a framework to construct different types of scientific concepts. I argue that among the frameworks for scientific kinds available, the one that is best suited to explicate emotion concepts is a functional framework. Consequently, I conclude by recommending scientists pursue functionalist theories of emotions over essentialist, historical, or social theories. (shrink)

Ingvar Johansson has argued that there are not only determinate universals, but also determinable ones. I here argue that this view is misguided by reviving a line of argument to the following effect: what makes determinates falling under a same determinable similar cannot be distinct from what makes them different. If true, some similarities — imperfect similarities between simple determinate properties — are not grounded in any kind of property-sharing. I suggest that determinables are better understood as maximal disjunctions of (...) brutely and imperfectly similar determinates. Such brute similarities have been thought to clash with realism about universals. I argue that this worry stems from the mistaken assumption that perfect and imperfect similarities are relations of a same kind. If exact and inexact resemblances are distinct and heterogeneous explananda, the realist about universals might explain the first thanks to property-sharing, while happily leaving imperfect similarities between properties unexplained. (shrink)

Through the years, many philosophers have appealed to reflective endorsement to address important philosophical problems. In this dissertation, I evaluate the merits of those approaches. I first consider Christine Korsgaard’s appeal to reflective endorsement to solve what she calls “the normative problem.” I then consider Harry Frankfurt’s use of reflective endorsement as part of his account of “caring,” which plays a crucial role in his accounts of agency, free will, and personhood. I then turn to Marilyn Friedman’s use of reflective (...) endorsement to explain autonomous action. Finally, I turn to Alan Gibbard’s use of reflective endorsement as part of an account of what it is to make a normative judgment. I argue that each of these positions is subject to similar problems—they fail to provide a plausible account of the self. In the remaining chapters, I argue that empirical psychological studies suggest that reflective endorsement plays an important role with respect to psychological health, but that judgments made by using a process of reflective endorsement are generally not accurate. Ultimately, I argue that reflective endorsement is valuable, but only under certain circumstances. (shrink)

Logic is the study of the quality of arguments. An argument consists of a set of premises and a conclusion. The quality of an argument depends on at least two factors: the truth of the premises, and the strength with which the premises confirm the conclusion. The truth of the premises is a contingent factor that depends on the state of the world. The strength with which the premises confirm the conclusion is supposed to be independent of the state of (...) the world. Logic is only concerned with this second, logical factor of the quality of arguments. (shrink)

This paper will argue that the puzzles about instantaneous velocity, and rates of change more generally, are the result of a failure to recognize an ambiguity in the concept of an instant, and therefore of an instantaneous state. We will conclude that there are two distinct conceptions of a temporal instant: (i) instants conceived as fundamentally distinct zero-duration temporal atoms and (ii) instants conceived as the boundary of, or between,temporally extended durations. Since the concept of classical instantaneous velocity is well- (...) defined only on the second conception of instants, we will conclude that this distinction allows us to avoid the above dilemma. If instantaneous velocity is well-defined then the states of a system at various instants are not logically distinct and thus we cannot generate Zeno’s paradox. However, if we assume that the instants are metaphysically distinct, then instantaneous velocity is not well-defined and thus the second horn of the dilemma about the causal-explanatory role of instantaneous velocity cannot be generated. (shrink)