This paper concerns automorphisms of the computably enumerable sets. We prove two results relating semilow sets and prompt degrees via automorphisms, one of which is complementary to a recent result of Downey and Harrington. We also show that the property of effective simplicity is not invariant under automorphism, and that in fact every promptly simple set is automorphic to an effectively simple set. A major technique used in these proofs is a modification of the Harrington-Soare version of the method of (...) Harrington-Soare and Cholak for constructing Δ 0 3 automorphisms; this modification takes advantage of a recent result of Soare on the extension of "restricted" automorphisms to full automorphisms. (shrink)

We investigate homomorphisms of degree structures with various relations, functions and constants. Our main emphasis is on pseudolattices, i.e., partially ordered sets with a join operation and relations simulating the meet operation. We show that there are no finite quotients of the pseudolattice of degrees or of the pseudolattice of degrees 0′, but that many finite distributive lattices are pseudolattice quotients of the pseudolattice of computably enumerable degrees.

Discussion of J. Kevin O’Regan’s “Why Red Doesn’t Sound Like a Bell: Understanding the Feel of Consciousness” Content Type Journal Article Pages 1-20 DOI 10.1007/s13164-012-0090-7 Authors J. Kevin O’Regan, Laboratoire Psychologie de la Perception, CNRS - Université Paris Descartes, Centre Biomédical des Saints Pères, 45 rue des Sts Pères, 75270 Paris cedex 06, France Ned Block, Departments of Philosophy, Psychology and Center for Neural Science, New York University, 5 Washington Place, New York, NY 10003, USA Journal Review of (...) Philosophy and Psychology Online ISSN 1878-5166 Print ISSN 1878-5158. (shrink)

Neuroeconomics is the newest of the economic sciences with a focus on how the embodied human brain interacts with its institutional and social environment to make economic decisions. This paper presents an overview of neuroeconomics methods and reviews a number of results in this emerging field of study.

We argue that uncomputability and classical scepticism are both re ections of inductive underdetermination, so that Church's thesis and Hume's problem ought to receive equal emphasis in a balanced approach to the philosophy of induction. As an illustration of such an approach, we investigate how uncomputable the predictions of a hypothesis can be if the hypothesis is to be reliably investigated by a computable scienti c method.

Discontented people might talk of corruption in the Commons, closeness in the Commons and the necessity of reforming the Commons, said Mr. Spenlow solemnly, in conclusion; but when the price of wheat per bushel had been the highest, the Commons had been the busiest; and a man might lay his hand upon his heart, and say this to the whole world, – ‘Touch the Commons, and down comes the country!’.

In this paper, we critically interrogate the benefits of an interdisciplinary and theoretically diverse dialogue between ‘local food’ and ‘alternative food networks’ and outline how this dialogue might be enriched by a closer engagement with discourses of food sovereignty and the politics of scale. In arguing for a shift towards a greater emphasis on food sovereignty, we contend that contemporary discourses of food security are inadequate for the ongoing task of ensuring a just and sustainable economy of food. Further, rather (...) than treating the local and the global as ontologically given categories around which to contest the politics of food, it is our contention that recognising the socio-spatial aspects of the politics of scale has the potential to reinvigorate discourses of food security, food sovereignty and AFNs. Understanding scale as both fixed to a degree as well as contingent and dynamic has implications for an understanding of the role of food systems, for how the rescaled state privileges certain food systems and the possibilities for resistance through ‘jumping scale’ and food utopias. All of these aspects are significant if we are to fully comprehend and contest the challenges of envisioning and enacting real utopias of food sovereignty. (shrink)

In the eyes of many, liberalism requires the aggressive secularization of social institutions, especially public media and public schools. The unfortunate result is that many Americans have become alienated from the liberal tradition because they believe it threatens their most sacred forms of life. This was not always the case: in American history, the relation between liberalism and religion has often been one of mutual respect and support. In Liberal Politics and Public Faith: Beyond Separation , Kevin Vallier attempts (...) to reestablish mutual respect by developing a liberal political theory that avoids the standard liberal hostility to religious voices in public life. He claims that the dominant form of academic liberalism, public reason liberalism, is far friendlier to religious influences in public life than either its proponents or detractors suppose. The best interpretation of public reason, convergence liberalism, rejects the much-derided "privatization" of religious belief, instead viewing religious contributions to politics as a resource for liberal political institutions. Many books reject privatization, Liberal Politics and Public Faith: Beyond Separation is unique in doing so on liberal grounds. (shrink)

There is growing interest in understanding and eliciting division of labor within groups of scientists. This paper illustrates the need for this division of labor through a historical example, and a formal model is presented to better analyze situations of this type. Analysis of this model reveals that a division of labor can be maintained in two different ways: by limiting information or by endowing the scientists with extreme beliefs. If both features are present however, cognitive diversity is maintained indefinitely, (...) and as a result agents fail to converge to the truth. Beyond the mechanisms for creating diversity suggested here, this shows that the real epistemic goal is not diversity but transient diversity. (shrink)

Recently psychologists and experimental philosophers have reported findings showing that in some cases ordinary people's moral intuitions are affected by factors of dubious relevance to the truth of the content of the intuition. Some defend the use of intuition as evidence in ethics by arguing that philosophers are the experts in this area, and philosophers' moral intuitions are both different from those of ordinary people and more reliable. We conducted two experiments indicating that philosophers and non-philosophers do indeed sometimes have (...) different moral intuitions, but challenging the notion that philosophers have better or more reliable intuitions. (shrink)

Philosophical logicians proposing theories of rational belief revision have had little to say about whether their proposals assist or impede the agent's ability to reliably arrive at the truth as his beliefs change through time. On the other hand, reliability is the central concern of formal learning theory. In this paper we investigate the belief revision theory of Alchourron, Gardenfors and Makinson from a learning theoretic point of view.

The Twin Earth thought experiment invites us to consider a liquid that has all of the superficial properties associated with water (clear, potable, etc.) but has entirely different deeper causal properties (composed of “XYZ” rather than of H2O). Although this thought experiment was originally introduced to illuminate questions in the theory of reference, it has also played a crucial role in empirically informed debates within the philosophy of psychology about people’s ordinary natural kind concepts. Those debates have sought to accommodate (...) an apparent fact about ordinary people’s judgments: Intuitively, the Twin Earth liquid is not water. We present results from four experiments showing that people do not, in fact, have this intuition. Instead, people tend to have the intuition that there is a sense in which the liquid is not water but also a sense in which it is water. We explore the implications of this finding for debates about theories of natural kind concepts, arguing that it supports views positing two distinct criteria for membership in natural kind categories – one based on deeper causal properties, the other based on superficial, observable properties. (shrink)

The Rawlsian texts appear not to be consistent with regard to the status of the right of freedom of association. Interestingly, Rawls's early work omits mention of freedom of association as among the basic liberties, but in his later work he explicitly includes freedom of association as among the basic liberties. However, freedom of association would appear to have an economic component as well. If one turns to such “private ordering”, we find a similar ambiguity in the Rawlsian texts, as (...) well as sharp divisions in the contemporary literature on Rawlsianism. This ambiguity has engendered widespread confusion over the scope of the two principles of justice—leading to the contemporary dispute over the breadth of what Rawls calls the “basic structure” and the question of whether the principles of justice are properly understood to govern private ordering. There is significant disagreement over the breadth of Rawls's basic structure—one aspect is whether the principles of justice apply to the private law. In a controversial passage in Political Liberalism Rawls addresses this question. This passage has, however, led commentators to reach divergent conclusions. We argue that this disagreement is explained by an instructive confusion in the passage over the distinction between what we characterize as “pre-institutional” and “post-institutional” freedom. The passage, we argue, illicitly shifts from invoking the post-institutional sense of “freedom” to the pre-institutional sense, thereby causing significant though understandable disagreement. Rawls's lapse into the pre-institutional conception of “freedom” provides interpretive grounds for the narrow understanding of the basic structure. If Rawls, however, had invoked the sense of “freedom” to which he is entitled at this stage of his theory—the post-institutional conception—such disagreement need not have arisen. (shrink)

Theories of scientific rationality typically pertain to belief. In this paper, the author argues that we should expand our focus to include motivations as well as belief. An economic model is used to evaluate whether science is best served by scientists motivated only by truth, only by credit, or by both truth and credit. In many, but not all, situations, scientists motivated by both truth and credit should be judged as the most rational scientists.

Increasingly, epistemologists are becoming interested in social structures and their effect on epistemic enterprises, but little attention has been paid to the proper distribution of experimental results among scientists. This paper will analyze a model first suggested by two economists, which nicely captures one type of learning situation faced by scientists. The results of a computer simulation study of this model provide two interesting conclusions. First, in some contexts, a community of scientists is, as a whole, more reliable when its (...) members are less aware of their colleagues' experimental results. Second, there is a robust tradeoff between the reliability of a community and the speed with which it reaches a correct conclusion. ‡The author would like to thank Brian Skyrms, Kyle Stanford, Jeffrey Barrett, Bruce Glymour, and the participants in the Social Dynamics Seminar at University of California–Irvine for their helpful comments. Generous financial support was provided by the School of Social Science and Institute for Mathematical Behavioral Sciences at UCI. †To contact the author, please write to: Department of Philosophy, Baker Hall 135, Carnegie Mellon University, Pittsburgh, PA 15213-3890; e-mail: kzollman@andrew.cmu.edu. (shrink)

Could low-level exposure to polluting chemicals be analogous to exercise -- a beneficial source of stress that strengthens the body? Some scientists studying the phenomenon of hormesis claim that that this may be the case.s A Little Pollution Good For You? critically examines the current evidence for hormesis.

This book asks whether evolution can help us to understand human behaviour and explores diverse evolutionary methods and arguments. It provides a short, readable introduction to the science behind the works of Dawkins, Dennett, Wilson and Pinker. It is widely used in undergraduate courses around the world.

Phineas Gage’s story is typically offered as a paradigm example supporting the view that part of what matters for personal identity is a certain magnitude of similarity between earlier and later individuals. Yet, reconsidering a slight variant of Phineas Gage’s story indicates that it is not just magnitude of similarity, but also the direction of change that affects personal identity judgments; in some cases, changes for the worse are more seen as identity-severing than changes for the better of comparable magnitude. (...) Ironically, thinking carefully about Phineas Gage’s story tells against the thesis it is typically taken to support. (shrink)

The role of values in scientific research has become an important topic of discussion in both scholarly and popular debates. Pundits across the political spectrum worry that research on topics like climate change, evolutionary theory, vaccine safety, and genetically modified foods has become overly politicized. At the same time, it is clear that values play an important role in science by limiting unethical forms of research and by deciding what areas of research have the greatest relevance for society. Deciding how (...) to distinguish legitimate and illegitimate influences of values in scientific research is a matter of vital importance.Recently, philosophers of science have written a great deal on this topic, but most of their work has been directed toward a scholarly audience. This book makes the contemporary philosophical literature on science and values accessible to a wide readership. It examines case studies from a variety of research areas, including climate science, anthropology, chemical risk assessment, ecology, neurobiology, biomedical research, and agriculture. These cases show that values have necessary roles to play in identifying research topics, choosing research questions, determining the aims of inquiry, responding to uncertainty, and deciding how to communicate information. Kevin Elliott focuses not just on describing roles for values but also on determining when their influences are actually appropriate. He emphasizes several conditions for incorporating values in a legitimate fashion, and highlights multiple strategies for fostering engagement between stakeholders so that value influences can be subjected to careful and critical scrutiny. (shrink)

Epistemologists have recently debated how we should respond to apparent cases of rational disagreement. Is it possible for two people to disagree and have both people still be rational? Those involved in this debate make use of the idea of epistemic peers. Two people are epistemic peers if they share the same knowledge of a given topic and have similar epistemic virtues. My paper argues that we have different kinds of epistemic peers; close peers who think similarly to ourselves, and (...) remote peers who think very differently. I argue that remote peers are genuine peers, but that we should respond to disagreement from remote peers differently than disagreement from close peers. (shrink)

The personal identity relation is of great interest to philosophers, who often consider fictional scenarios to test what features seem to make persons persist through time. But often real examples of neuroscientific interest also provide important tests of personal identity. One such example is the case of Phineas Gage – or at least the story often told about Phineas Gage. Many cite Gage’s story as example of severed personal identity; Phineas underwent such a tremendous change that Gage “survived as a (...) different man.” I discuss a recent empirical finding about judgments about this hypothetical. It is not just the magnitude of the change that affects identity judgment; it is also the negative direction of the change. I present an experiment suggesting that direction of change also affects neuroethical judgments. I conclude we should consider carefully the way in which improvements and deteriorations affect attributions of personal identity. This is particularly important since a number of the most crucial neuroethical decisions involve varieties of cognitive enhancements or deteriorations. (shrink)

Theory of mind, the capacity to understand and ascribe mental states, has traditionally been conceptualized as analogous to a scientific theory. However, recent work in philosophy and psychology has documented a "side-effect effect" suggesting that moral evaluations influence mental state ascriptions, and in particular whether a behavior is described as having been performed 'intentionally.' This evidence challenges the idea that theory of mind is analogous to scientific psychology in serving the function of predicting and explaining, rather than evaluating, behavior. In (...) three experiments, we demonstrate that moral evaluations do inform ascriptions of intentional action, but that this relationship arises because behavior that conforms to norms (moral or otherwise) is less informative about underlying mental states than is behavior that violates norms. This analysis preserves the traditional understanding of theory of mind as a tool for predicting and explaining behavior, but also suggests the importance of normative considerations in social cognition. (shrink)

J. S. Mill's role as a transitional figure between classical and egalitarian liberalism can be partly explained by developments in his often unappreciated economic views. Specifically, I argue that Mill's separation of economic production and distribution had an important effect on his political theory. Mill made two distinctions between economic production and the distribution of wealth. I argue that these separations helped lead Mill to abandon the wages-fund doctrine and adopt a more favorable view of organized labor. I also show (...) how Mill's developments impacted later philosophers, economists, and historians. Understanding the relationship between Mill's political theory and economic theory does not only matter for Mill scholarship, however. Contemporary philosophers often ignore the economic views of their predecessors. I argue that paying insufficient attention to historical political philosophers' economic ideas obscures significant motivations for their political views. (shrink)

Much of contemporary knowledge is generated by groups not single individuals. A natural question to ask is, what features make groups better or worse at generating knowledge? This paper surveys research that spans several disciplines which focuses on one aspect of epistemic communities: the way they communicate internally. This research has revealed that a wide number of different communication structures are best, but what is best in a given situation depends on particular details of the problem being confronted by the (...) group. (shrink)

The traditional view of heaven holds that the redeemed in heaven both have free will and are no longer capable of sinning. A number of philosophers have argued that the traditional view is problematic. How can someone be free and yet incapable of sinning? If the redeemed are kept from sinning, their wills must be reined in. And if their wills are reined in, it doesn’t seem right to say that they are free. Following James Sennett, we call this objection (...) to the traditional view of heaven ‘the Problem of Heavenly Freedom’. In this paper, we discuss and criticize four attempts to respond to the Problem of Heavenly Freedom. We then offer our own response to this problem which both preserves the traditional view of heaven and avoids the objections which beset the other attempts. (shrink)

Natural theology's name can be misleading, for it sounds like what is being done is a kind of theology, not philosophy. But natural theology is better understood to be primarily philosophical rather than theological for it is, most generally, the ...

A number of studies have shown that seemingly morally irrelevant factors influence the moral judgments of ordinary people. Some argue that philosophers are experts and are significantly less susceptible to such effects. We tested whether an unconscious cleanliness prime – the smell of Lysol – affects the judgments of both non-philosophers and professional philosophers. Our results suggest that the direction of cleanliness effects depends both on the respondent and whether the question is framed in the second or third person. They (...) also provide evidence that cleanliness cues affect the moral judgments of both non-philosophers and philosophers, challenging the philosopher-as-expert view. (shrink)

Justifying religious exemptions is a complicated matter. Citizens ask to not be subject to laws that everyone else must follow, raising worries about equal treatment. They ask to be exempted on a religious basis, a basis that secular citizens do not share, raising worries about the equal treatment of secular and religious citizens. And they ask governmental structures to create exceptions in the government’s own laws, raising worries about procedural fairness and stability. We nonetheless think some religious exemptions are appropriate, (...) and in some cases, that exemptions are morally required. So how are we to determine when religious exemptions are justified? This article employs a public reason framework to provide an answer. I show how to publicly justify religious exemptions. My thesis is that a citizen merits a religious exemption under four conditions: if she has sufficient intelligible reason to oppose the law, if the law imposes unique and substantial burdens on the integrity of those exempted that are not off-set by comparable benefits, if the large majority of citizens have sufficient reason to endorse the law, and if the exempted group does not impose significant costs on other parties that require redress. If these conditions are met, then legislative and/or judicial bodies should carve out an exemption for those requesting them. (shrink)

‘What is characteristic of every mental activity’, according to Brentano, is ‘the reference to something as an object. In this respect every mental activity seems to be something relational.’ But what sort of a relation, if any, is our cognitive access to the world? This question – which we shall call Brentano’s question – throws a new light on many of the traditional problems of epistemology. The paper defends a view of perceptual acts as real relations of a subject to (...) an object. To make this view coherent, a theory of different types of relations is developed, resting on ideas on formal ontology put forward by Husserl in his Logical Investigations and on the theory of relations sketched in Smith's "Acta cum fundamentis in re". The theory is applied to the notion of a Cambridge change, which proves to have an unforeseen relevance to our understanding of perception. (shrink)

This book brings together eleven case studies of inductive risk-the chance that scientific inference is incorrect-that range over a wide variety of scientific contexts and fields. The chapters are designed to illustrate the pervasiveness of inductive risk, assist scientists and policymakers in responding to it, and productively move theoretical discussions of the topic forward.

A realist theory of truth for a class of sentences holds that there are entities in virtue of which these sentences are true or false. We call such entities ‘truthmakers’ and contend that those for a wide range of sentences about the real world are moments (dependent particulars). Since moments are unfamiliar, we provide a definition and a brief philosophical history, anchoring them in our ontology by showing that they are objects of perception. The core of our theory is the (...) account of truthmaking for atomic sentences, in which we expose a pervasive ‘dogma of logical form’, which says that atomic sentences cannot have more than one truthmaker. In contrast to this, we uphold the mutual independence of logical and ontological complexity, and the authors outline formal principles of truthmaking taking account of both kinds of complexity. (shrink)

Mainstream political liberalism holds that legal coercion is permissible only if it is based on reasons that all can share, access or accept. But these requirements are subject to well-known problems. I articulate and defend an intelligible reasons requirement as an alternative. An intelligible reason is a reason that all suitably idealized members of the public can see as a reason for the person who offers it according to that person’s own evaluative standards. It thereby permits reasons into public justification (...) that all cannot share, access, or accept, and so contrasts with standard approaches to public justification. The intelligible reasons requirement has two striking implications. First, it severs the connection between public justification and principles of deliberative restraint. Second, it pushes political liberals to appeal to other political processes to publicly justify law, specifically bargaining, adjudication, and social evolution. (shrink)

In “The Trouble with Tracing,” Manuel Vargas argues that tracing-based approaches to moral responsibility are considerably more problematic than previously acknowledged. Vargas argues that many initially plausible tracing-based cases of moral responsibility turn out to be ones in which the epistemic condition for moral responsibility is not satisfied, thus suggesting that contrary to initial appearances the agent isn’t morally responsible for the action in question. In the present paper, I outline two different strategies for responding to Vargas’s trouble with tracing. (...) I then show how further consideration of the epistemic condition for moral responsibility renders tracing significantly less problematic than Vargas claims. (shrink)

One popular conception of natural theology holds that certain purely rational arguments are insulated from empirical inquiry and independently establish conclusions that provide evidence, justification, or proof of God’s existence. Yet, some raise suspicions that philosophers and theologians’ personal religious beliefs inappropriately affect these kinds of arguments. I present an experimental test of whether philosophers and theologians’ argument analysis is influenced by religious commitments. The empirical findings suggest religious belief affects philosophical analysis and offer a challenge to theists and atheists, (...) alike: reevaluate the scope of natural theology’s conclusions or acknowledge and begin to address the influence of religious belief. (shrink)

Vogel, Sosa, and Huemer have all argued that sensitivity is incompatible with knowing that you do not believe falsely, therefore the sensitivity condition must be false. I show that this objection misses its mark because it fails to take account of the basis of belief. Moreover, if the objection is modified to account for the basis of belief then it collapses into the more familiar objection that sensitivity is incompatible with closure.

Americans today are far less likely to trust their institutions, and each other, than in decades past. This collapse in social and political trust arguably fuels our increasingly ferocious ideological conflicts and hardened partisanship. Many believe that our previously high levels of trust and bipartisanship were a pleasant anomaly and that we now live under the historic norm. Seen this way, politics itself is nothing more than a power struggle between groups with irreconcilable aims: contemporary American politics is war because (...) political life as such is war. -/- Must Politics Be War? argues that our shared liberal democratic institutions have the unique capacity to sustain social and political trust between diverse persons. In succinct, convincing prose, Kevin Vallier argues that constitutional rights and democratic governance prevent any one ideology or faith from dominating all others, thereby protecting each person's freedom to live according to her values and principles. Illiberal arrangements, where one group's ideology or faith reigns, turn those who disagree into unwilling subversives, persons with little reason to trust their regime or to be trustworthy in obeying it. Liberal arrangements, in contrast, incentivize trust and trustworthiness because they allow people with diverse and divergent ends to act with conviction. Those with opposing viewpoints become trustworthy because they can obey the rules of their society without acting against their ideals. Therefore, as Vallier illuminates, a liberal society is one at moral peace with a politics that is not war. (shrink)

Reasonable individuals often share a rationale for a decision but, in other cases, they make the same decision based on disparate and often incompatible rationales. The social contract tradition has been divided between these two methods of solving the problem of social cooperation: must social cooperation occur in terms of common reasoning, or can individuals with different doctrines simply converge on shared institutions for their own reasons? For Hobbes, it is rational for all persons, regardless of their theological beliefs, to (...) consent to the sovereign's power. But for Locke, only Protestants with a shared theology could be party to the social contract. Rousseau thought that private reasons are not part of the general will, and in Kant's hypothetical contract, pure noumena reach common principles for the social order through the same reasoning process. In A Theory of Justice, John Rawls agreed with Rousseau and Kant: selecting the principles of justice requires modeling parties to the original position as having identical reasons. But in Political Liberalism, Rawls embraced the idea of an overlapping consensus, which accords distinct reasons justificatory force. (shrink)