We use some simple facts about the wtt-degrees of r.e. sets together with a construction to answer some questions concerning the join and meet operators in the r.e. degrees. The construction is that of an r.e. Turing degree a with just one wtt-degree in a such that a is the join of a minimal pair of r.e. degrees. We hope to illustrate the usefulness of studying the stronger reducibility orderings of r.e. sets for providing information about Turing reducibility.

A paradigm of scientific discovery is defined within a first-order logical framework. It is shown that within this paradigm there exists a formal scientist that is Turing computable and universal in the sense that it solves every problem that any scientist can solve. It is also shown that universal scientists exist for no regular logics that extend first-order logic and satisfy the Löwenheim-Skolem condition.

A splitting of an r.e. set A is a pair A1, A2 of disjoint r.e. sets such that A1 A2 = A. Theorems about splittings have played an important role in recursion theory. One of the main reasons for this is that a splitting of A is a decomposition of A in both the lattice, , of recursively enumerable sets and in the uppersemilattice, R, of recursively enumerable degrees . Thus splitting theor ems have been used to obtain results about (...) the structure of , the structure of R, and the relationship between the two structures. Furthermore it is fair to say that questions about splittings have often generated important new technical developments in recursion theory. In this article we survey most of the results and techniques associated with splitting properties of r.e. sets in ordinary recursion theory. (shrink)

A splitting A1A2 = A of an r.e. set A is called a Friedberg splitting if for any r.e. set W with W — A not r.e., W — Ai≠0 for I = 1,2. In an earlier paper, the authors investigated Friedberg splittings of maximal sets and showed that they formed an orbit with very interesting degree-theoretical properties. In the present paper we continue our investigations, this time analyzing Friedberg splittings and in particular their orbits and degrees for various classes (...) of r.e. sets. (shrink)

We examine the prospects for finding “best possible” or “ideal” computing machines for various learning tasks. For this purpose, several precise senses of “ideal machine” are considered within the context of formal learning theory. Generally negative results are provided concerning the existence of ideal learning‐machines in the senses considered.

We advance a model of human probability judgment and apply it to the design of an extrapolation algorithm. Such an algorithm examines a person's judgment about the likelihood of various statements and is then able to predict the same person's judgments about new statements. The algorithm is tested against judgments produced by thirty undergraduates asked to assign probabilities to statements about mammals.

The overarching theme of Michael Kochin's Five Chapters on Rhetoric seems to be that classical rhetoric is still important. With the help of Socrates, Plato, Aristotle, Gorgias, Callicles, Protagoras, Isocrates, Cicero, Quintilian, and others, Kochin makes the case that when thinking about rhetoric, we ought to listen to the ancients—at least most of the time. While the overarching theme deals with the classical tradition, the book's central argument is focused squarely on current rhetorical practices. The proper role of rhetoric, (...) Kochin argues, is to allow "the facts" to "speak for themselves" (164). He attempts to establish this claim by exploring five concepts that are, or ought to be, central to our .. (shrink)

William Gavin’s William James in Focus: Willing to Believe is a brief and creative introduction to James’s philosophy aimed at students and non-specialists. As the subtitle of the book suggests, Gavin uses James’s will to believe doctrine as the organizing theme for his interpretation of James’s philosophy. One might initially think that this implies reading the latter in the light of James’s views on religion, but Gavin downplays the religious aspects of James’s will to believe doctrine and focuses instead on (...) its relevance for understanding what he terms the “latent image” of James’s personal life, which according to Gavin is primarily concerned with human mortality and the need to affirm philosophical positions.. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:"Terministic Screens," Social Constructionism, and the Language of Experience:Kenneth Burke's Utilization of William JamesPaul StobKenneth Burke's influence on various academic disciplines is clear in the number of books and articles published annually on his thought. It is also clear insofar as academics continue to turn to his work for insights on handling scholarly problems. That is to say, not only do we explore the dimensions of his work, we (...) also bring it to bear on current disputes in the hopes of clarifying or moving past the issues we face. His thought, in short, has a currency that transcends its historical period. "As we meet new challenges that echo the past," writes Ross Wolin, "Burke's inquiries into meaning, orientation, faction, communication, and rhetoric are as urgent today as when Burke raised them long ago and for decades after."1By bringing the terms of Burke's work to bear on current disputes, we connect him to the vocabularies and discourses that surround us. His thought becomes familiar through the lenses we employ, as we intermix his ideas with our own terminology and see his work through the language of our discussions. One example of this phenomenon is the way scholars have been describing Burke's philosophical outlook. Burke's thought, we are told, is that of a social constructionist. Edward Schiappa, for example, concludes that Burke gives us a view of the world as intersubjectively created: "Our understanding is social in the sense that our concepts are human-made and are part of a shared language. Our understanding is [End Page 130] constructed in the sense that our claims, interpretations, and orientations constitute 'conceptual fabrics' that weave together contingent sets of beliefs and social practices."2 Paul Jay turns the sentiment into a more explicitly epistemological point: "The most radical aspect of Burke's evolving theory of language at this time is his recognition that language—inherently metaphorical—constructs rather than reflects knowledge."3 James Chesebro highlights social constructionism as one of the hallmarks of Burke's dramatism: "For Burke, the realm of symbol-using is unique to the human being. Symbol-using is a solely conventional, arbitrary, and social process. It allows human beings to become self-conscious, create motives independently of physical phenomena, and ultimately to create social constructions of reality."4 Dennis Ciesielski argues that Burke's "terministic screens" define "base reality into truth-systems unique to each respective discourse community and impl[y] a neo-pragmatic, social constructionist pattern for the making of meaning."5 Finally, Robert Wess characterizes Burke's entire career as the evolution from a materialist, biological-essentialist view of the human self to a social constructionist view.6Generally speaking, "social constructionism" is a metaphor that attempts to capture the way Burke viewed the nature of the world and the function of language therein. It suggests that symbols, terms, and language form the building blocks, the bricks and mortar, of the structures of our collective life. We employ symbols that construct our social realities, similar to the way a contractor employs the materials and labor that construct a house. Consequently, the realities we face are not inherent in nature but are built up discursively and can therefore be reconstructed as we alter our discursive practices.7The social construction metaphor positions Burke's philosophical out-look in terms that are familiar to us, though not necessarily familiar to him. That is to say, the label of social constructionist is recent, and it comes not from Burke's work but from intellectual developments after he wrote the bulk of his corpus.8 We apply it to him retroactively, meshing together his intellectual milieu with our own. And as Ian Hacking reminds us, "The phrase has become code. If you use it favorably, you deem yourself rather radical. If you trash the phrase, you declare that you are rational, reasonable, and respectable."9Labeling Burke a social constructionist wraps his thought in a current metaphor, merging his perspective with a vocabulary that was not part of his project. While such a merger is not necessarily a bad thing—to some degree the process is inevitable10—a certain danger... (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Kenneth Burke, John Dewey, and the Pursuit of the PublicPaul StobIn Deliberation Day, Bruce Ackerman and James Fishkin argue for the creation of a national holiday, "Deliberation Day," in which citizens come together over a two-day period in their local schools and community centers to deliberate over the merits of presidential candidates and their platforms (Ackerman and Fishkin 2004). While Ackerman and Fishkin propose that the government pay each (...) citizen a $150 stipend for voluntary participation, the purpose is not so much to monetarily to reward citizens for "showing up" as it is to foster an enriched civic culture that would send shockwaves through America's political infrastructure: "If Deliberation Day succeeded, everything else would change: the candidates, the media, the activists, the interest groups, the spin doctors, the advertisers, the pollsters, the fund raisers, the lobbyists, the political parties. All would have no choice but to adapt to a more attentive and informed public" (3). The task of Deliberation Day would be to create a new social context in which citizens could become enlightened through public participation. As the authors conclude the book, "We can, through an act of political imagination, create new institutions for redeeming the ancient promise of democratic citizenship. Ordinary men and women need not be the hapless playthings of the powerful. They can and must find new ways to hold their leaders to account, and redeem their dignity as human beings by responsibly shaping their collective destiny" (219).Ackerman and Fishkin's proposal is indeed filled with political imagination. I bring their proposal to light not to critique the possibilities and limitations of Deliberation Day, but to understand the way in which the authors understand "the public." At the bottom, what the polity needs, Ackerman and Fishkin believe, is a public space dedicated to the reinvigoration [End Page 226] of political culture. It is not that the citizenry is incapable of hammering out intelligent political solutions, but that it needs access to social contexts that facilitate deliberation and the emergence of a common good. To foster a culture of political intelligence, the public needs only the chance to enter the forums that will facilitate thorough, cooperative political decision-making.Ackerman and Fishkin are not alone in calling for access to or creation of these types of forums. Habermas's bourgeois public sphere—a public space in which citizens could come together and rationally debate the activities of the state—essentially represents the evolution of a context, a social space, a public arena (Habermas 1989). The bourgeois public sphere is meant to be egalitarian, providing citizens a forum in which to debate openly and foster a common political consciousness.1 But this sphere has proved problematic for a number of scholars. Oskar Negt and Alexander Kluge (1993), for example, propose a proletarian public sphere to counter capitalism's socioeconomic domination over public resources. Joan Landes (1988) argues that the bourgeois public sphere entails male domination in public life, to the exclusion of women. Nancy Fraser (1992) builds on the feminist critique by adopting the term "counterpublics," collectives of citizens—women, peasants, the working class, and other groups demarcated by issues of race, gender, and ethnicity—that arise in reaction to the dominant public sphere.2In the introduction to Counterpublics and the State (2001), Robert Asen and Daniel Brouwer argue that critiques of the bourgeois public sphere specifically and public sphere theory generally amount to three "reconfigurations" in the way in which scholars think of the public. First, scholars have come to recognize the existence and interaction of multiple public spheres. Second, they have come to acknowledge permeable boundaries of access to the multiple public spheres. Third, scholars have come to recognize the dynamic role of the state in shaping public discourse. One considerable result of these three reconfigurations is an increasing recognition of the political divisions that permeate society (Asen and Brouwer 2001, 17-25).If Asen and Brouwer are right, and I think they are, these three reconfigurations represent the general thrust of contemporary public sphere scholarship, including as it is understood among communication scholars.3 And however diverse such scholarship may be, a few common themes seem to recur across... (shrink)

According to the received account of guilt in the philosophical literature, one cannot feel guilt unless one takes oneself to have done something morally wrong. But ordinary people feel guilt in many cases in which they do not take themselves to have done anything morally wrong. In this paper, I focus on one kind of guilt without perceived wrongdoing, guilt about being merely causally responsible for a bad state-of-affairs. I go on to present a novel account of guilt that explains (...) guilt about mere causal responsibility, according to which guilt represents part of the self as bound up with what is bad. (shrink)

During his long career, John Dewey produced an almost endless number of pages of dense philosophical prose, giving those interested in his work plenty to do. Even scholars of rhetoric have found a host of reasons to return to Dewey’s corpus, despite the fact that Dewey himself seemed, at best, uninterested in rhetoric. Two recent works—Robert Danisch’s Pragmatism, Democracy, and the Necessity of Rhetoric and Nathan Crick’s Democracy and Rhetoric: John Dewey on the Arts of Becoming—have already fruitfully mined Dewey’s (...) writings for insights on how pragmatist philosophy intersects with the rhetorical tradition. Now comes Scott Stroud’s John Dewey and the Artful Life. Like Danisch and Crick, Stroud explores the nexus .. (shrink)

For Situationist, theorist and film-maker Guy Debord, the aerial view reproduced the falsely objective world-view he called ‘the spectacle’. To counter its myth of an infinitely expandable, omniscient perspective, Debord focused on reducing views from above to ‘derisory documents’ of the social and the environmental through détournement in the two films he made while the Situationist International was in existence. The films engage critically with aerial photography as a hegemonic mode of indexical media, with the aerial view’s application as information (...) image and ornament, and with the formal phenomenon of ciné-mapping. This analysis suggests that the détournement Debord performs in and across these films can be best conceptualized as a critical optic that constitutes a practice of seeing, a mode of reception and a call to action in the social space beyond its aesthetic employ. As such, the optic of détournement is the contestational counterpart to the optic of the aerial view. This remains the case despite the contemporary complexity of photographic views from above and their increased abstraction of social agents and spaces. An alternative to the testimonial function of embodied photographic views, détournement as optic represents an indexical civil contract founded upon representational inadequacy. (shrink)

The fact that Gilbert Ryle and J.L. Austin seem to disagree about the ordinary use of words such as ‘voluntary’, ‘involuntary’, ‘voluntarily’, and ‘involuntarily’ has been taken to cast doubt on the methods of ordinary language philosophy. As Benson Mates puts the worry, ‘if agreement about usage cannot be reached within so restricted a sample as the class of Oxford Professors of Philosophy, what are the prospects when the sample is enlarged?’ (Mates, Inquiry 1:161–171, 1958, p. 165). In this chapter, (...) we evaluate Mates’s criticism alongside Ryle’s and Austin’s specific claims about the ordinary use of these words, assessing these claims against actual examples of ordinary use drawn from the British National Corpus (BNC). Our evaluation consists in applying a combination of methods: first aggregating judgments about a large set of samples drawn from the corpus, and then using a clustering algorithm to uncover connections between different types of use. In applying these methods, we show where and to what extent Ryle’s and Austin’s accounts of the use of the target terms are accurate as well as where they miss important aspects of ordinary use, and we demonstrate the usefulness of this new combination of methods. At the heart of our approach is a commitment to the idea that systematically looking at actual uses of expressions is an essential component of any approach to ordinary language philosophy. (shrink)

Twenty years ago, even ten years ago, one might have begun an essay about the intersection of pragmatism and rhetoric by lamenting the dearth of scholarship on the subject. Today, no such lamentations are needed. The past decade has seen an explosion of interest in the way pragmatism and rhetoric can profitably inform each other. Offering everything from formulations of pragmatist rhetorical theory (Mailloux 1998; Schollmeier 2002; Danisch 2007; Crick 2010) to explorations of pragmatist methodology in the study of rhetorical (...) texts (Stroud 2009a; Stroud 2010) to analyses of what individual pragmatists have contributed to the history of rhetoric (Asen and Brouwer 2003; Asen 2003; Finnegan 2003; Greene 2003; Stob .. (shrink)

Our aim in this paper is to present the distinct ways in which Wolff, Baumgarten, and Kant understand the relationship between necessitation, constraint, and reluctant action in an effort to illustrate the subtle ways in which their conceptions of obligation differ from each another. Whereas Wolff conceives of natural or moral obligation as incompatible with constraint, Baumgarten holds that constraint and reluctant action are, in some instances, compatible with natural obligation. Kant departs from Baumgarten by conceiving of obligation as necessarily (...) involving constraint: as Kant’s reply to Schiller’s famous objection reveals, obligation must take on the character of constraint to reluctant action on account of the fact that human beings possess inclinations that always threaten to impel them in directions that oppose morality. (shrink)

What is the relation between small-scale collaborative plans and the execution of those plans within interactive contexts? I argue here that joint attention has a key role in explaining how shared plans and shared intentions are executed in interactive contexts. Within singular action, attention plays the functional role of enabling intentional action to be guided by a prior intention. Within interactive joint action, it is joint attention, I argue, that plays a similar functional role of enabling the agents to act (...) in a collaborative way such that their actions are rationally guided by a prior shared intention. This understanding of joint attention – as having a key functional role of enabling the rational guidance of joint intentional action by a prior shared intention – allows for an alternative understanding of the kind of minimal cooperation that infants can engage in. On this understanding, infants’ capacity to engage in joint actions is already an incipient capacity to engage in rational and intentional joint actions, albeit a capacity that is necessarily scaffolded by an adult rational co-partner. (shrink)

An Essay on Human Action seeks to provide a comprehensive, detailed, enlightening, and (in its detail) original account of human action. This account presupposes a theory of events as abstract, proposition-like entities, a theory which is given in the first chapter of the book. The core-issues of action-theory are then treated: what acting in general is (a version of the traditional volitional theory is proposed and defended); how actions are to be individuated; how long actions last; what acting intentionally is; (...) what doing one thing by doing another is; what basic action is; and what omitting to do something is. Attention is also given to the concepts of causation, intention, volition, deciding, choosing, and trying. Finally, a libertarian account of free action is tentatively proposed and defended. (shrink)

This a clear and concise introduction to Danish philosopher Soren Kierkegaard.ichael Watts uses Kierkegaard's own writings to introduce his theoriesbout living a truthfu; and spiritual life, while explaining the enormousnfluence of the philosopher's personal life on his work and beliefs. As theounder of 20th century existentialism, and the first philosopher to definehe idea of angst, Kierkegaard's profound influence on modern life is clearlyefined in accessible terms in this guide for students and general readers.

Over the last decades, curator Nicolas Bourriaud has drawn significant inspiration for his writings on contemporary art from the theories of the Situationist International (SI), an avant-garde group in existence from 1957 until 1972. Mischaracterizing the SI’s concepts of the situation, détournement, and the dérive, Bourriaud claims to update these concepts with concepts of his own: relational aesthetics, detourage, and radicant aesthetics. This article identifies such misrepresentations and highlights the differences between Bourriaud’s paradigms and those of the SI. This contextual (...) restitution also provides an opportunity to examine Bourriaud’s general methodology of substituting conceptual formalism for art historical theory. Bourriaud’s publications repeatedly claim a historical materialist perspective on aesthetics, only to eventually eliminate this perspective; his use and abuse of Situationist theory is the foundational example for this pattern. More than the artworks showcased in Bourriaud’s exhibitions and referenced in his publications, his artistic paradigms describe and delineate his own philosophical sleight of hand. (shrink)

Eloquence & professionalism in the nineteenth century -- Engaging science and society -- Talking to teachers -- Speaking up for spirits -- Religious experience & the appeals of intellectual populism -- Empowering a pragmatic public.

Opponents of medically assisted dying have long appealed to ‘slippery slope’ arguments. One such slippery slope concerns palliative care: that the introduction of medically assisted dying will lead to a diminution in the quality or availability or palliative care for patients near the end of their lives. Empirical evidence from jurisdictions where assisted dying has been practiced for decades, such as Oregon and the Netherlands, indicate that such worries are largely unfounded. The failure of the palliation slope argument is nevertheless (...) instructive with respect to how slippery slope arguments can be appraised without having to await post-facto evidence regarding the effects of a proposed change in public policy. Close attention in particular to the norms operative in a given institution and how changes to policy will interact with those norms enable slippery slopes to be credibly appraised. (shrink)

What is the relation between joint attention and common knowledge? On the one hand, the relation seems tight: the easiest and most reliable way of knowing something in common with another is for you and that other to be attentively aware of what you are together experiencing. On the other hand, they couldn’t seem further apart: joint attention is a mere perceptual phenomena that infants are capable of engaging in from nine months of age, whereas common knowledge is a cognitive (...) phenomenon involving (so it seems) complex, overlapping metarepresentational states that require the kind of sophisticated mindreading skills that developmental psychology has shown to be beyond the capabilities of young children. In 'The Shared World: Perceptual Common Knowledge, Demonstrative Communication, and Shared Social Space', Axel Seemann attempts, inter alia, to makensense of this conundrum. (shrink)

We ordinarily suppose that there is a difference between having and failing to exercise a rational capacity on the one hand, and lacking a rational capacity altogether on the other. This is crucial for our allocations of responsibility. Someone who has but fails to exercise a capacity is responsible for their failure to exercise their capacity, whereas someone who lacks a capacity altogether is not. However, as Gary Watson pointed out in his seminal essay ’Skepticism about Weakness of Will’, the (...) idea of an unexercised capacity is much more difficult to make sense of than it initially appears. The aim of ’Rational Capacities’ is to provide the needed explication of this idea. (shrink)

The problem with authenticity—the idea of being “true to one’s self”—is that its somewhat checkered reputation garners a complete range of favorable and unfavorable reactions. In educational settings, authenticity is lauded as one of the top two traits students desire in their teachers. Yet, authenticity is criticized for its tendency towards narcissism and self-entitlement. So, is authenticity a good or a bad thing? The purpose of this article is to develop an intimate understanding of authenticity by investigating its current interpretation (...) and criticisms, its struggle with narcissism and relation to freedom. Examining authenticity as multilayered self-exploration reveals a composite of understanding, care, and acceptance. While a side current of acceptable tension shifts our understanding of authenticity from the security of self-determination to the messy interplay involved in being “true to one’s self” and being “in-the-world”. (shrink)

Drawing on work of the past decade, this volume brings together articles from the philosophy, history, and sociology of science, and many other branches of the biological sciences. The volume delves into the latest theoretical controversies as well as burning questions of contemporary social importance. The issues considered include the nature of evolutionary theory, biology and ethics, the challenge from religion, and the social implications of biology today (in particular the Human Genome Project).

Ethical debates about assisted dying typically assume that only medical professionals should be able to provide patients with assisted dying. This assumption partially rests on the unstated principle that assisted dying providers may not be motivated by pecuniary considerations. Here I outline and defend a mixed provider model of assisted dying provision that contests this principle. Under this model, medically competent non-physician professionals could receive fees for providing assisted dying under the same terms and conditions as physicians can in those (...) juris- dictions where medically assisted dying is lawful. The mixed provider model blunts objections to assisted dying rooted in supposed clashes with medical values. In addition to generating a market likely to expand access to assisted dying, the mixed provider model would not create markets that are unjust because they are “noxious” in Satz’ sense or because they raise “semiotic” concerns about the value of human life. (shrink)

The third edition of a work that defines the field of cognitive neuroscience, with extensive new material including new chapters and new contributors.

Discussions of the nature or possibility of moral expertise have largely proceeded in atheoretical terms, with little attention paid to whether moral expertise depends on theoretical knowledge of morality. Here I argue that moral expertise is more theory-dependent than is commonly recognized: Moral expertise consists, at least in part, in knowledge of the correct or best moral theory, and second, that knowledge of moral theory is essential to moral experts dispensing expert counsel to non-experts. Moral experts would not be moral (...) experts absent knowledge of moral theory, nor could they play the testimonial role we would expect them to play in moral inquiry and deliberation absent such knowledge. (shrink)

I show that the common reading of Thomson, that she argues by analogy for the conclusion that abortion is permissible, is mistaken. The correct reading of Thomson is that she argues by counterexample, showing that arguments against abortion are unsound. The remainder of the paper highlights the lessons learned from Thomson once we read her aright.

Neural reuse is a form of neuroplasticity whereby neural elements originally developed for one purpose are put to multiple uses. A diverse behavioral repertoire is achieved by means of the creation of multiple, nested, and overlapping neural coalitions, in which each neural element is a member of multiple different coalitions and cooperates with a different set of partners at different times. Neural reuse has profound implications for how we think about our continuity with other species, for how we understand the (...) similarities and differences between psychological processes, and for how best to pursue a unified science of the mind.After Phrenology: Neural Reuse and the Interactive Brain(2014; henceforthAfter Phrenologyin this Précis) surveys the terrain and advocates for a series of reforms in psychology and cognitive neuroscience. The book argues that, among other things, we should capture brain function in a multidimensional manner, develop a new, action-oriented vocabulary for psychology, and recognize that higher-order cognitive processes are built from complex configurations of already evolved circuitry. (shrink)

Ethical cultures, corporate social responsibility (CSR), and sustainability strategies are increasingly being addressed through formal organisational policies and structures. This is evidenced by codes of ethics, conduct, whistle-blowing reporting lines, anti-bribery and corruption policies, and broader stakeholder and environmental engagement strategies. In the United States, corporate ethics managers are responsible for these functions, supported by specific professional and university-level qualifications. However, this is not the case in Australia and Asia where the role appears delegated to human resource personnel in organisations. (...) Human resource management (HRM) is increasingly advanced as a formal profession, yet whether corporate ethics content features as a significant component of the HRM profession is unclear. Expert knowledge is a foundation of a profession along with the duty to act within the limits of that knowledge and expertise. This paper scopes what constitutes professional expert knowledge. It examines corporate ethics expertise and HRM within this context. Major Australian and Asian organisations are examined to verify that HRM Departments, and thus HRM practitioners, are responsible for managing corporate ethics. Given the seniority and strategic importance of this function, the content of selected Masters in HRM and related fields are examined to identify the extent of ethics content. This is considered in the light of the expertise required to manage corporate ethics, and conclusions are drawn whether the HRM discipline is appropriately qualified to manage this function. Finally, recommendations and further research towards advancing the role and function of corporate ethics managers in general are proposed. (shrink)