:The question as to whether people with an addiction have control over their addiction, and voluntarily decide to use substances is an ongoing source of controversy in the context of research on addiction, health policy and clinical practice. We describe and discuss a set of five challenges for further research into voluntariness based on our own research experiences and those of others.

Substantial research efforts have been devoted to developing a cure for autism, but some advocates of people with autism claim that these efforts are misguided and even harmful. They claim that there is nothing wrong with people with autism, so there is nothing to cure. Others argue that autism is a serious and debilitating disorder and that a cure for autism would be a wonderful medical breakthrough. Our goal in this essay is to evaluate what assumptions underlie each of these (...) positions. We evaluate the arguments made on each side, reject those that are implausible and then highlight the key assumptions of those that remain. (shrink)

Predictivism asserts that novel confirmations carry special probative weight. Epistemic pluralism asserts that the judgments of agents (about, e.g., the probabilities of theories) carry epistemic import. In this paper, I propose a new theory of predictivism that is tailored to pluralistic evaluators of theories. I replace the orthodox notion of use-novelty with a notion of endorsement-novelty, and argue that the intuition that predictivism is true has two roots. I provide a detailed Bayesian rendering of this theory and argue that pluralistic (...) theory evaluation pervades scientific practice. I compare my account of predictivism with those of Maher and Worrall. Introduction Why construction is a red herring for pluralist evaluators The unvirtuous accommodator Virtuous endorsers and the two roots of predictivism The two roots in Bayesian terms: the priors and background beliefs of endorsers Who are the pluralist evaluators? Two contemporary theories of predictivism 7.1 Maher: Reliable methods of theory construction 7.2 Worrall: The confirmation of core ideas Conclusion. (shrink)

Moral theorists and game theorists are both interested in situations where rational agents are to constrain their future actions and co-operate with others instead of being free riders. These theorists have constructed a variety of hypothetical games which illuminate this problem of constraint. In this paper, I draw a distinction between like the Newcomb paradox and like Kavka's toxin puzzle, a prisoner's dilemma and Parfit's hitchhiker example. I then employ this distinction to argue that agents who subscribe to the orthodox (...) theory of rationality do significantly better in disposition games than those who subscribe to revisionist theories like David Gauthier's, while revisionist agents do marginally better in behaviour games. I argue that because of agents' ability to manipulate their own weakness of will, orthodox agents do better at all of these games than has previously been thought. And, by elucidating the distinction between behaviour games and disposition games, I uncover the virtues that underlie the success of each theory of rationality. (shrink)

An enduring question in the philosophy of science is the question of whether a scientific theory deserves more credit for its successful predictions than it does for accommodating data that was already known when the theory was developed. In The Paradox of Predictivism, Eric Barnes argues that the successful prediction of evidence testifies to the general credibility of the predictor in a way that evidence does not when the evidence is used in the process of endorsing the theory. (...) He illustrates his argument with an important episode from nineteenth-century chemistry, Mendeleev's Periodic Law and its successful predictions of the existence of various elements. The consequences of this account of predictivism for the realist/anti-realist debate are considerable, and strengthen the status of the 'no miracle' argument for scientific realism. Barnes's important and original contribution to the debate will interest a wide range of readers in philosophy of science. (shrink)

An enduring question in the philosophy of science is the question of whether a scientific theory deserves more credit for its successful predictions than it does for accommodating data that was already known when the theory was developed. In The Paradox of Predictivism, Eric Barnes argues that the successful prediction of evidence testifies to the general credibility of the predictor in a way that evidence does not when the evidence is used in the process of endorsing the theory. (...) He illustrates his argument with an important episode from nineteenth-century chemistry, Mendeleev's Periodic Law and its successful predictions of the existence of various elements. The consequences of this account of predictivism for the realist/anti-realist debate are considerable, and strengthen the status of the 'no miracle' argument for scientific realism. Barnes's important and original contribution to the debate will interest a wide range of readers in philosophy of science. (shrink)

Philip Kitcher has proposed a theory of explanation based on the notion of unification. Despite the genuine interest and power of the theory, I argue here that the theory suffers from a fatal deficiency: It is intrinsically unable to account for the asymmetric structure of explanation, and thus ultimately falls prey to a problem similar to the one which beset Hempel's D-N model. I conclude that Kitcher is wrong to claim that one can settle the issue of an argument's explanatory (...) force merely on the basis of considerations about the unifying power of the argument pattern the argument instantiates. (shrink)

The law of desire has been proposed in several forms, but its essential claim is that agents always act on their strongest proximal action motivation. This law has threatening consequences for human freedom, insofar as it greatly limits agents’ ability to do otherwise given their motivational state. It has proven difficult to formulate a version that escapes counterexamples and some categorically deny its truth. Noticeable by its absence in the literature is any attempt to provide an argument for the law (...) of desire – I propose such an argument here. It is noted that Sripada's “divided mind” theory of willpower provides a counterexample to the version of the law of desire my argument defends, but I note that a reformulated version of the law of desire survives this critique. I conclude that there is a serious case for the law of desire, and note the broader implications of this. (shrink)

The legalization of cannabis in Canada instantiates principles of harm-reduction and safe supply. However, in-depth understanding of values at stake and attitudes toward legalization were not part of extensive democratic deliberation. Through a qualitative exploratory study, we undertook 48 semi-structured interviews with three Canadian stakeholder groups to explore opinions and values with respect to the legalization of cannabis: (1) members of the general public, (2) people with lived experience of addiction and (3) clinicians with experience treating patients with addiction. Across (...) all groups, participants tended to be in favor of legalization, but particular opinions rested on their viewpoint as stakeholders. Clinicians considered the way legalization would affect an individual’s health and its potential for increasing rates of addiction on a larger scale. People with lived experience of addiction cited personal autonomy more than other groups and stressed the need to have access to quality information to make truly informed decisions. Alternatively, members of the public considered legalization positive or negative in light of whether one’s addiction affected others. We elaborate on and discuss how scientific evidence about drug use impact values relates and how can different arguments play in democratic debates about legalization. (shrink)

The theory of explanatory unification was first proposed by Friedman (1974) and developed by Kitcher (1981, 1989). The primary motivation for this theory, it seems to me, is the argument that this account of explanation is the only account that correctly describes the genesis of scientific understanding. Despite the apparent plausibility of Friedman's argument to this effect, however, I argue here that the unificationist thesis of understanding is false. The theory of explanatory unification as articulated by Friedman and Kitcher thus (...) emerges as fundamentally misconceived. (shrink)

This paper proposes a solution to David Miller's Minnesotan-Arizonan demonstration of the language dependence of truthlikeness (Miller 1974), along with Miller's first-order demonstration of the same (Miller 1978). It is assumed, with Peter Urbach, that the implication of these demonstrations is that the very notion of truthlikeness is intrinsically language dependent and thus non-objective. As such, truthlikeness cannot supply a basis for an objective account of scientific progress. I argue that, while Miller is correct in arguing that the number of (...) true atomic sentences of a false theory is language dependent, the number of known sentences (under certain straightforward assumptions) is conserved by translation; degree of knowledge, unlike truthlikeness, is thus a linguistically invariant notion. It is concluded that the objectivity of scientific progress must be grounded on the fact (noted in Cohen 1980) that knowledge, not mere truth, is the aim of science. (shrink)

In this paper I develop a theory of contrastive why questions that establishes under what conditions it is sensible to ask "why p rather than q?". p and q must be outcomes of a single type of causal process.

I aim to show that one way of testing the mettle of a theory of scientific explanation is to inquire what that theory entails about the status of brute facts. Here I consider the nature of brute facts, and survey several contemporary accounts of explanation vis a vis this subject. One problem with these accounts is that they seem to entail that brute facts represent a gap in scientific understanding. I argue that brute facts are non-mysterious and indeed are even (...) explainable by the lights of Salmon's ontic conception of explanation. The plausibility of various models of explanation, I suggest, depends to some extent on the tendency of their proponents to focus on certain examples of explananda - I ponder brute facts qua explananda here as a way of helping us to recognize this dependency. (shrink)

Some compatibilists have responded to the manipulation argument for incompatibilism by proposing an historical theory of moral responsibility which, according to one version, requires that agents be morally responsible for having their pro-attitudes if they are to be morally responsible for acting on them. This proposal, however, leads obviously to an infinite regress problem. I consider a proposal by Haji and Cuypers that addresses this problem and argue that it is unsatisfactory. I then go on to propose a new solution (...) inspired by the libertarian theory of Robert Kane. (shrink)

The miracle argument for scientific realism can be cast in two forms: according to the miraculous theory argument, realism is the only position which does not make the empirical successes of particular theories miraculous. According to the miraculous choice argument, realism is the only position which does not render the fact that empirically successful theories have been chosen a miracle. A vast literature discusses the miraculous theory argument, but the miraculous choice argument has been unjustifiably neglected. I raise two objections (...) to Richard Boyd's defense of the latter: (1) we have no miracle free account of the emergence of take-off theories and (2) the anti-realist can account for the non-miraculous choice of empirically successful theories by attributing mere empirical adequacy to background theory. I argue that the availability of extra-empirical criteria that are arguably truth conductive but not theory-laden suffices to answer (1), and the unavailability of extra-empirical criteria that are conductive to empirical adequacy but not necessarily to truth (and are also not theory-laden) constitutes to reply to (2). The prospects for a realist victory are at least somewhat promising, on a controversial assumption about the rate at which empirically successful theories emerge. (shrink)

In The Paradox of Predictivism I tried to demonstrate that there is an intimate relationship between predictivism and epistemic pluralism. Here I respond to various published criticisms of some of the key points from Paradox from David Harker, Jarret Leplin, and Clark Glymour. Foci include my account of predictive novelty, the claim that predictivism has two roots, the prediction per se and predictive success, and my account of why Mendeleev’s predictions carried special weight in confirming the Periodic Law of the (...) Elements. (shrink)

Predictivism asserts that where evidence E confirms theory T, E provides stronger support for T when E is predicted on the basis of T and then confirmed than when E is known before T's construction and 'used', in some sense, in the construction of T. Among the most interesting attempts to argue that predictivism is a true thesis (under certain conditions) is that of Patrick Maher (1988, 1990, 1993). The purpose of this paper is to investigate the nature of predictivism (...) using Maher's analysis as a starting point. I briefly summarize Maher's primary argument and expand upon it; I explore related issues pertaining to the causal structure of empirical domains and the logic of discovery. (shrink)

A pluralistic scientific method is one that incorporates a variety of points of view in scientific inquiry. This paper investigates one example of pluralistic method: the use of weighted averaging in probability estimation. I consider two methods of weight determination, one based on disjoint evidence possession and the other on track record. I argue that weighted averaging provides a rational procedure for probability estimation under certain conditions. I consider a strategy for calculating ‘mixed weights’ which incorporate mixed information about agent (...) credibility. I address various objections to the weighted averaging technique and conclude that the technique is a promising one in various respects. (shrink)

Predictivism holds that, where evidence E confirms theory T, E confirms T more strongly when E is predicted on the basis of T and subsequently confirmed than when E is known in advance of T's formulation and used, in some sense, in the formulation of T. Predictivism has lately enjoyed some strong supporting arguments from Maher (1988, 1990, 1993) and Kahn, Landsberg, and Stockman (1992). Despite the many virtues of the analyses these authors provide it is my view that they (...) (along with all other authors on this subject) have failed to understand a fundamental truth about predictivism: the existence of a scientist who predicted T prior to the establishment that E is true has epistemic import for T (once E is established) only in connection with information regarding the social milieu in which the T-predictor is located and information regarding how the T-predictor was located. The aim of this paper is to show that predictivism is ultimately a social phenomenon that requires a social level of analysis, a thesis I deem social predictivism. (shrink)

David Miller has demonstrated to the satisfaction of a variety of philosophers that the accuracy of false quantitative theories is language dependent (cf. Miller 1975). This demonstration renders the accuracy-based mode of comparison for such theories obsolete. The purpose of this essay is to supply an alternate basis for theory comparison which in this paper is deemed the knowledge-based mode of quantitative theory comparison. It is argued that the status of a quantitative theory as knowledge depends primarily on the soundness (...) of the measurement procedure which produced the theory; such soundness is invariant, on my view, under Milleresque translations. This point is the basis for the linguistic invariance of knowledgelikeness. When the aim of science is not construed simply in terms of the truthlikeness or accuracy of theories, but in terms of the knowledge such theories embody, Miller's language dependence problem is overcome. One result of this analysis is that the possibility of objective scientific progress is restored, a possibility that Miller's analysis has prima facie defeated. (shrink)

D. Miller's demonstrations of the language dependence of truthlikeness raise a profound problem for the claim that scientific progress is objective. In two recent papers (Barnes 1990, 1991) I argue that the objectivity of progress may be grounded on the claim that the aim of science is not merely truth but knowledge; progress thus construed is objective in an epistemic sense. In this paper I construct a new solution to Miller's problem grounded on the notion of "approximate causal explanation" (...) which allows for linguistically invariant progress outside an epistemic context. I suggest that the notion of "approximate causal explanation" provides the resources for a more robust theory of progress than that provided by the notion of "approximate truth.". (shrink)

This paper critically responds to Tim Maudlin's argument against a computational theory of consciousness. It is argued that his artfully constructed Turing machine 'Olympia' does not meet an important condition for computation, namely that the computed input serve as an active cause of the computational activity. Thus a computational theory of consciousness remains a live option.

Physical determinism is a metaphysical thesis about the natural world whose consequences for freedom and moral responsibility have been widely discussed. In this paper, I articulate a different form of determinism, motivational determinism, which claims that all intentional action is causally determined by the prior motivational state of the agent. Motivational determinism was defended in a simple form by Hume, but has been neglected in recent philosophical literature. I show that there are important reasons that support the plausibility of MD. (...) I then compare MD with libertarian and physical deterministic theories of agency and note that MD has various attractive features. I show that MD is much more threatening to moral responsibility than physical determinism. I conclude that MD is an interesting theory of human agency that deserves wide attention. (shrink)

Addiction is a common condition affecting millions of people worldwide of which only a small proportion receives treatment. The development and use of healthcare services is influenced by how addiction is understood (e.g., a condition to treat, a shameful condition to stigmatize), notably with respect to how volition is impacted (e.g., addiction as a choice or a disease beyond one’s control). Through semi-structured qualitative interviews, we explore the implicit views and understandings of addiction and volition across three stakeholder groups: people (...) with lived experience of addiction, clinicians with experience treating addiction, and members of the public without lived experience of addiction. We notably examine whether three paradigms, i.e., three philosophical sets of understandings about the nature of reality and knowledge (realism, relativism, pragmatism) reflect how stakeholders envision addiction and volition in the context of addiction. The use of these paradigms allows for the characterization of different stances on addiction and volition and an assessment of the coherence of beliefs about these matters. Our findings demonstrate that few participants relied on a single epistemic paradigm when describing their views. Furthermore, there were notable differences in understandings of volition between the clinician group, who were more oriented toward pragmatism, and people with lived experience of addiction, who were less oriented toward realism. Despite its limitations, our study suggests that a greater appreciation for the complexity of views held by different stakeholders about addiction and volition could help critically assess the search for coherence expressed in academic and policy debates. (shrink)

Some proponents of compatibilist moral responsibility have proposed an historical theory which requires that agents deploy character control in order to be morally responsible. An important type of argument for the character control condition is the manipulation argument, such as Mele’s example of Beth and Chuck. In this paper I show that Beth can be exonerated on various conditions other than her failure to execute character control—I propose a new character, Patty, who meets these conditions and is, I argue, morally (...) responsible for her actions despite lacking character control. Thus the character control condition is unmotivated. I suggest there may be an alternative basis for an historical theory of moral responsibility nonetheless. (shrink)

California, Arizona, and several other states have recently legalized medical marijuana. My goal in this paper is to demonstrate that even if one grants the opponents of legalization many of their contentious assumptions, the federal government is still obligated to take several specific steps toward the legalization of medical marijuana. I defend this claim against a variety of objections, including the claims: that marijuana is unsafe, that marijuana cannot be adequately tested or produced as a drug, that the availability of (...) synthetic THC makes marijuana superfluous, and especially that legalizing medical marijuana will increase recreational use by ‘sending the wrong message ’. I then go on to argue that given the intransigent position of the federal government on this issue, state governments are justified in unilaterally legalizing medical marijuana as an act of civil disobedience. A large portion of this paper consists of an extensive response to the objection that legalizing medical marijuana will ‘send the wrong message ’– which I take to be the primary impediment to legalization. This objection basically claims that the consequences of withholding legalization (especially preventing increased recreational use) are superior to those of legalizing medical marijuana. I argue that legalization is justified even if one were to grant both that the harms of legalization outweighed its benefits and that utilitarianism is true. This requires a subtle and somewhat extended discussion of utilitarian moral and political theory. (shrink)

In the 1970's a problem arose for the viability of Popper's truthlikeness project. The problem, in short, was that all plausible measures of the truthlikeness of scientific theories were language dependent. This dissertation is primarily concerned to provide a substitute notion that can do the work 'verisimilitude' was intended to do without suffering from linguistic relativity. It is argued that the notion of 'knowledge', or 'knowledgelikeness', can suffice in this regard. ;Chapter One seeks to convince the reader that the notion (...) of 'truthlikeness' is intrinsically non-objective; all attempts to salvage the objectivity of truthlikeness have failed. Chapters Two, Three, and Four argue that the various language dependence arguments can be overcome by adopting a knowledge-based approach. Chapter Five attempts to diagnose the underlying cause behind the failure of the verisimilitude project. (shrink)

An adequate moral theory must provide for cooperation and trust between moral agents, but a tension exists between cooperating and maximizing. This tension is prominent in utilitarianism and contractarianism . Various puzzles illustrate this tension, and both utilitarians and contractarians must solve these to present a coherent moral theory. These puzzles include new and resilient versions of classic objections to utilitarianism, such as the claims that utilitarian agents cannot be trusted to keep promises and cannot take rights seriously. They also (...) include the contractarian puzzle of why rational agents would cooperate by making and keeping impartial contracts. In solving these problems, utilitarians and contractarians alike must choose between traditional and revisionary maximizing theories. ;In light of these problems: David Gauthier urges contractarians to appeal to a revisionary theory of rationality, Donald Regan has developed a new variety of utilitarianism, and many other theorists still argue for the revisionary theory of rule utilitarianism. These people underestimate the potential of traditional theories. Although traditional theories like act utilitarianism look only to the future--while revisionary theories sometimes take prior acts such as promises, deliberations, and intentions to justify action--traditional theories are still able to solve these puzzles and furnish a satisfactory account of cooperation and trust. Surprisingly, even though these puzzles were developed as objections to the traditional theories and the revisionist theories were designed to deal with these puzzles, the traditional theories provide superior solutions. ;This defense of traditional theories has broad implications in philosophy and elsewhere, but I specifically discuss two significant implications for modern moral theory and two implications for applied ethics. I reject the criticism that act utilitarianism fails on its own terms and argue that it has previously unnoticed advantages over rule utilitarianism. I also reformulate Gauthier's moral theory using the traditional theory of rationality, thereby answering a major criticism of his theory. In addition, I apply my understanding of traditional maximizing theories to the utilitarian theory of rights and then to the strategic problems of nuclear deterrence and of threats in general. (shrink)

Physical determinism is a metaphysical thesis about the natural world whose consequences for freedom and moral responsibility have been widely discussed. In this paper, I articulate a different form of determinism, motivational determinism, which claims that all intentional action is causally determined by the prior motivational state of the agent. Motivational determinism was defended in a simple form by Hume, but has been neglected in recent philosophical literature. I show that there are important reasons that support the plausibility of MD. (...) I then compare MD with libertarian and physical deterministic theories of agency and note that MD has various attractive features. I show that MD is much more threatening to moral responsibility than physical determinism. I conclude that MD is an interesting theory of human agency that deserves wide attention. (shrink)

The problem of dirty hands concerns the apparently inevitable need for effective politicians to do what is ethically wrong. This essay discusses a related problem in democratic elections of politicians being unwilling to commit themselves to precise positions on controversial policy issues. Given certain plausible assumptions, I demonstrate using a simple game theoretic model that there is an incentive structure for political candidates that is damaging to the public good. I contrast this problem with the classic prisoner’s dilemma and then (...) go on to discuss some possible strategies for overcoming this problem by an improved system of political debates. (shrink)

Sherrilyn Roush's Tracking Truth provides a sustained and ambitious development of the basic idea that knowledge is true belief that tracks the truth. In this essay, I provide a quick synopsis of Roush's book and offer a substantive discussion of her analysis of scientific evidence. Roush argues that, for e to serve as evidence for h, it should be easier to determine the truth value of e than it is to determine the truth value of h, an ideal she refers (...) to as ‘leverage’. She defends a detailed method by which the value of p(h/e) is computed without ‘direct’ information about p(h) but only using evidence about the value of p(e), from which the value of p(h) is derived. She presents an example of how to use her leverage method, which I argue involves a certain critical mistake. I show how the leveraging method can be used in a way that is sound—I conclude with a few remarks about the importance of distinguishing clearly between prior and posterior probabilities. (shrink)

At the Barnes Foundation in 1931, Matisse undertook the painting of a large decorative panel entitled La Danse. Its stakes are considerable: the disqualification of the painting-form and the drawing-genre, in favor of an environmental art infused with a decorative vitalism that redefines the architectural function itself at the deepest level, beyond any question of site-specificity.

According to Eric Mack, the Wilt Chamberlain Argument makes two distinct points against all patterned and end-state theories of justice. First, the pattern theorist cannot explain how innocuous actions can give rise to an injustice. Second, the enforcement of a pattern theory requires constant redistribution of holdings, and that prevents people from forming legitimate expectations about their future holdings. This paper responds to both of these points. Mack’s first point denies or disregards the relevance of harmful consequences to the (...) justice or injustice of a distribution. The second point is based on a requirement that is either too demanding to be plausible, or too permissive to undermine pattern theories. The failure of Mack’s arguments illustrates the difficulty of resolving substantive political debates with a priori arguments alone. When faced with objections, the only possible defense of the Wilt Chamberlain argument resorts to empirical claims, which stand in need of empirical evidence. (shrink)

Strong predictivism, the idea that novel predictions per se confirm theories more than accommodations, is based on a “no miracle” argument from novel predictions to the truth of theories (NMAT). Eric Barnes rejects both: he reconstructs the NMAT as seeking an explanation for the entailment relation between a theory and its novel consequences, and argues that it involves a fallacious application of Occam’s razor. However, he accepts a no miracle argument for the truth of background beliefs (NMABB): scientists (...) endorsed a successful theory because they were guided by largely true background beliefs. This in turn raises the probability that the theory is true; so Barnes embraces a form of weak predictivism, according to which predictions are only indirectly relevant to confirmation. To Barnes I reply that we should also explain how the successful theory was constructed, not just endorsed; background beliefs are not enough to explain success, scientific method must also be considered; Barnes can account for some measure of confirmation of our theories, but not for the practical certainty conferred to them by some astonishing predictions; true background beliefs and reliability by themselves cannot explain novel success, the truth of theories is also required. Hence, the NMAT is sound, and strong predictivism is right. In fact, Barnes misinterprets the NMAT, which does not involve Occam’s razor, takes as explanandum the building of a theory which turned out to predict surprising facts, and successfully concludes that the theory is true. This accounts for the practically certain confirmation of our most successful theories, in accordance with strong predictivism. (shrink)

Eric Barnes’ The Paradox of Predictivism is concerned primarily with two facts: predictivism (the fact that novel predictions play an important part in scientificconfirmation) and pluralism (the fact that scientific development is not just a matter of isolated individuals judging the truth, but at least partly a matter of trusting legitimate experts). In the middle part of the book, he peers through these two lenses at the tired realist scarecrow of the no-miracles argument. He attempts to reanimate this (...) weatherworn realist argument, contra suggestions by people like me that it should be abandoned. In this paper, I want to get clear on Barnes’ contribution to the debate. He focuses on what he calls the miraculous endorsement argument, which explains not the success of a specific theory but instead the history of successes for an entire research program. The history of successes is explained by reliable and improving methods, which are the flipside of approximately true background theories. Yet, as Barnes notes, the whole story must begin with methods that are at least minimally reliable. Barnes demands that the realist explain the origin of the minimally reliable take-off point, and he suggests a way that the realist might do so. I contend that his explanation still relies on contingent developments and so fails to completely explain the development of take-off theories. However, this line of argument digs into familiar details of the no-miracles argument and overlooks what’s new in Barnes’ approach. By calling attention to pluralism, he reminds us that we need an account of scientific expertise. This is important, I suggest, because expertise is not indefinite. We do not trust specific experts for everything, but only for things within the bounds of their expertise. Drawing these boundaries relies on our own background theories and is only likely to be reliable if our background theories are approximately true. I argue, then, that pluralism gives us reason to be realists (about some things). (shrink)