This book is a specialized monograph on the development of the mathematical and computational metatheory of reductive logic and proof-search, areas of logic that are becoming important in computer science. A systematic foundational text on these emerging topics, it includes proof-theoretic, semantic/model-theoretic and algorithmic aspects. The scope ranges from the conceptual background to reductive logic, through its mathematical metatheory, to its modern applications in the computational sciences. Suitable for researchers and graduate students in mathematical, computational and philosophical logic, and in (...) theoretical computer science and artificial intelligence, this is the latest in the prestigous world-renowned Oxford Logic Guides, which contains Michael Dummet's Elements of intuitionism (2nd Edition), Dov M. Gabbay, Mark A. Reynolds, and Marcelo Finger's Temporal Logic Mathematical Foundations and Computational Aspects, J. M. Dunn and G. Hardegree's Algebraic Methods in Philosophical Logic, H. Rott's Change, Choice and Inference: A Study of Belief Revision and Nonmonotonic Reasoning, and P. T. Johnstone's Sketches of an Elephant: A Topos Theory Compendium: Volumes 1 and 2. (shrink)

This book is a specialized monograph on the development of the mathematical and computational metatheory of reductive logic and proof-search, areas of logic that are becoming important in computer science. A systematic foundational text on these emerging topics, it includes proof-theoretic, semantic/model-theoretic and algorithmic aspects. The scope ranges from the conceptual background to reductive logic, through its mathematical metatheory, to its modern applications in the computational sciences. Suitable for researchers and graduate students in mathematical, computational and philosophical logic, and in (...) theoretical computer science and artificial intelligence, this is the latest in the prestigous world-renowned Oxford Logic Guides, which contains Michael Dummet's Elements of intuitionism, Dov M. Gabbay, Mark A. Reynolds, and Marcelo Finger's Temporal Logic Mathematical Foundations and Computational Aspects, J. M. Dunn and G. Hardegree's Algebraic Methods in Philosophical Logic, H. Rott's Change, Choice and Inference: A Study of Belief Revision and Nonmonotonic Reasoning, and P. T. Johnstone's Sketches of an Elephant: A Topos Theory Compendium: Volumes 1 and 2. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Spheres of Philosophical Inquiry and the Historiography of Medieval Philosophy by John InglisMark D. JordanJohn Inglis. Spheres of Philosophical Inquiry and the Historiography of Medieval Philosophy. Brill’s Studies in Intellectual History, volume 81. Leiden, Boston, Köln: Brill, 1998. Pp. x + 324. Cloth, $99.50.Modern philosophers have shown themselves quite unphilosophical about the academic history of their own discipline. Content with grand stories that move from Plato to themselves, (...) they have treated institutional histories, recent histories, and bibliographical histories as unworthy of attention. John Inglis sets out to change all that for the study of medieval philosophy. He demonstrates by the book’s end that we have failed to recognize our historiographical procedures as conventions—with very particular histories of their own.The first part of the book traces the genealogy of the dominant (one might say, hegemonic) model in recent studies of medieval philosophy. The genealogy is prefaced with two chapters that show how various were the motives for reconstructions of medieval thought before 1850 in authors such as Billuart, Goudin, and Brucker or Hegel, Ritter, and Hauréau. These chapters might be dismissed by contemporary scholars as so much antiquarianism. There can be no dismissing the relevance to contemporary work of Inglis’s main genealogy, which runs with surprising directness from Joseph Kleutgen (1811–1883) and Albert Stöckl (1823–1895) to Norman Kretzmann and Anthony Kenny.It adds to the piquancy of Inglis’s argument that most specialists in medieval philosophy will not even recognize the names of Kleutgen and Stöckl, much less feel kinship with them. But Inglis shows convincingly what Kleutgen and Stöckl did to make the study of medieval philosophy possible in modern universities. Kleutgen mapped the medieval texts onto a system of “spheres,” of fields or topics, recognizable to professors of philosophy. This means that he necessarily privileged epistemology, as he necessarily connected a medieval thinker’s views across the “spheres” into a system—or a failed attempt at one. Kleutgen then emphasized the reason/revelation dichotomy and an allegiance to what he understood as the system of Thomas Aquinas. Put these elements together and you have a surprisingly familiar story. It remained for Stöckl to write it up as an erudite and monumental narration.Inglis follows this „Kleutgen-Stöckl model” through a number of more familiar authors, including De Wulf, Gilson, Boehner, Weinberg, and the editors of the Cambridge [End Page 530] History of Later Medieval Philosophy. Of course, in reducing the genealogy to a list of famous names I ignore two of its great virtues. The first is the detail with which it retells the institutional circumstances and the forgotten intermediaries of the scholarly tradition. Behind the genealogy, around its borders, there stands Inglis’s enormous effort of original research, much of it archival. The genealogy’s second virtue is the dialectical subtlety with which it locates continuities under contradictions. Gilson is usually touted as the antithesis of De Wulf, and Kretzmann of Gilson. Inglis makes such antitheses seem superficial by comparing them with an abiding if tacit agreement about how medieval texts can be appropriated within modern philosophy. To seal the comparison, Inglis suggests in the book’s second part what a real antithesis to the Kleutgen-Stöckl model might be. He reconstructs, in his last two chapters, Thomas’s accounts of human knowledge and of theology’s relations to philosophy in opposition to that model’s prescriptions.No review can represent—or even adequately praise—the enormous learnedness of this book. Moreover, since the book already discusses so much, it must seem ungrateful to suggest that it ought to discuss anything else. Let me end then rather by posing two questions beyond the book’s end. First, does Inglis’s genealogy mean to suggest that the Kleutgen-Stöckl model is now chiefly received in English-speaking philosophy departments? I wonder, for example, how far Inglis might judge Alain de Libera’s Penser au Moyen Age (Paris: Éds. de Seuil, 1991) an alternative to that model. Certainly de Libera shows more self-consciousness about the culturally determined history behind our historiography. His emphasis on the thirteenth-century recovery... (shrink)

This paper offers a new way to make sense of disagreement expansion from a polylogical perspective by incorporating various places in addition to players and positions into the analysis. The concepts build on prior implicit ideas about disagreement space by suggesting how to more fully account for argumentative context, and its construction, in large-scale complex controversies. As a basis for our polylogical analysis, we use a New York Times news story reporting on an oil train explosion—a significant point in the (...) broader controversy over producing oil and gas via hydraulic fracturing. (shrink)

The following article is an excerpt from Professor Gerhard Ritter's contribution to a Symposium on the origins and methods of National Socialism. This Symposium, whose publication in English translation is forthcoming, was organised under the auspices of the International Council for Philosophy and Humanistic Studies. The International Council for Philosophy and Humanistic Studies has assured complete freedom of expression to all participants while obviously not endorsing any of the opinions expressed in the Symposium.In presenting the material of this Symposium (...) the publishers wish to make it clear that the opinions expressed are those of the authors themselves and do not represent the policy of Intercultural Publications or the views of its personnel. (shrink)

This article describes a process of developing, implementing and evaluating a clinical ethics support service intervention with the goal of building up a context-sensitive structure of minimal clinical-ethics in an oncology department without prior clinical ethics structure. Scholars from different disciplines have called for an improvement in the evaluation of clinical ethics support services for different reasons over several decades. However, while a lot has been said about the concepts and methodological challenges of evaluating CESS up to the present time, (...) relatively few empirical studies have been carried out. The aim of this article is twofold. On the one hand, it describes a process of development, modifying and evaluating a CESS intervention as part of the ETHICO research project, using the approach of qualitative-formative evaluation. On the other hand, it provides a methodological analysis which specifies the contribution of qualitative empirical methods to the evaluation of CESS. We conclude with a consideration of the strengths and limitations of qualitative evaluation research with regards to the evaluation and development of context sensitive CESS. We further discuss our own approach in contrast to rather traditional consult or committee models. (shrink)

Wittgenstein’s Whewell’s Court Lectures contains previously unpublished notes from lectures given by Ludwig Wittgenstein between 1938 and 1941. The volume offers new insight into the development of Wittgenstein’s thought and includes some of the finest examples of Wittgenstein’s lectures in regard to both content and reliability.

A specific issue for argumentation theory is whether information and communication technologies play any role in governing argument — that is, as parties engage in practical activities across space and time via ICTs, does technology matter for the interplay of argumentative content and process in managing disagreement? The case made here is that technologies do matter because they are not merely conduits of communication but have a role in the pragmatics of communication and argumentation. In particular, ICTs should be recognized (...) as communication-information services that are delegated degrees of responsibility for managing disagreements arising from practical activities. These services are organized around practical theories for designing disagreement space. However, recognizing this relationship between argument and technology requires accounting for procedures, techniques, or rules and speech acts that are not argumentative propositions in any strict sense but that are consequential for what becomes argumentation in any setting. An account about designing disagreement space, grounded in Jackson and Jacobs’s theory of Disagreement Management, is put forward to address these issues while more generally contributing to understanding argument in context. (shrink)

Everyone wants to be virtuous, but recent psychological investigations suggest that this may not be possible. Mark Alfano challenges this theory and asks, not whether character is empirically adequate, but what characters human beings could have and develop. Although psychology suggests that most people do not have robust character traits such as courage, honesty and open-mindedness, Alfano argues that we have reason to attribute these virtues to people because such attributions function as self-fulfilling prophecies - children become more studious (...) if they are told that they are hard-working and adults become more generous if they are told that they are generous. He argues that we should think of virtue and character as social constructs: there is no such thing as virtue without social reinforcement. His original and provocative book will interest a wide range of readers in contemporary ethics, epistemology, moral psychology and empirically informed philosophy. (shrink)

Like much in this book, the title and dust jacket illustration are clever. The first evokes Hume's remark in the Treatise that ‘Reason is, and ought only to be the slave of the passions.’ The second, which represents a cross between a dance-step and a clinch, links up with the title and anticipates an example used throughout the book to support its central claims: that Ronnie, unlike Bradley, has a reason to go to a party – namely, that there will (...) be dancing at the party – because Ronnie, unlike Bradley, loves dancing. So, the explanation of why Ronnie's and Bradley's reasons differ lies in their respective psychologies.Schroeder argues for a version of the Humean Theory of Reasons he calls Hypotheticalism, which says that every reason is explained by a desire in the same way as Ronnie's is. Schroeder argues that on almost every count, Hypotheticalism is as good as, or preferable to, the Humean and non-Humean alternatives; and he defends it against an array of objections. For example, he explains that while Hypotheticalism claims that ‘desires have to serve in the explanation of every reason because desires are part of the correct analysis of reasons’, it does not claim that a desire that explains a reason is part of that reason: rather it is a background condition for it. This, Schroeder argues, allows him to rebut a variety of objections that depend on conflating reasons with their background conditions. Other …. (shrink)

It is argued here that large-scale organization and networked computing enable new divisions of communicative work aimed at shaping the content, direction, and outcomes of societal conversations. The challenge for argumentation theory and practice lies in attending to these new divisions of communicative work in constituting contemporary argumentative realities. Goffman’s conceptualization of participation frameworks and production formats are applied to articulate the communicative work of organizations afforded by networked computing that invents and innovates argument in all of its senses—as product, (...) process, and procedure. Communicative work, however, may be scaffolding argumentative contexts and practices that are quite different than what has constituted past argumentative realities. The computerization of argument happens as organizations invent and innovate argument practice relative to the demands and opportunities of interorganizational communication. The cases and examples examined here suggest that argument practice is evolving around the logic of conversation and the principle of personalization. The analysis challenges argumentation theory to seriously engage with the construction of communicative contexts and the realization of ideas about disagreement management in organizational practice and information infrastructures. Directions for integrating insights from a design perspective on argument with insights from organizational and information systems theory are proposed for coming to terms with an era of large-scale organization and computerization, in particular the evolution of argument practice, the inscription of argument in the built environment, and the absorption of socio-cultural argument practices by organizations and computation. (shrink)

The volume deals with the history of logic, the question of the nature of logic, the relation of logic and mathematics, modal or alternative logics (many-valued, relevant, paraconsistent logics) and their relations, including translatability, to classical logic in the Fregean and Russellian sense, and, more generally, the aim or aims of philosophy of logic and mathematics. Also explored are several problems concerning the concept of definition, non-designating terms, the interdependence of quantifiers, and the idea of an assertion sign. The contributions (...) concerned with Wittgenstein's investigations into the philosophy of logic and mathematics pursue issues relating to logical necessity, the undeniability of the law of the excluded middle, and the source of self-evidence, often characterized in the literature as the "rule-following considerations". Additionally, they examine Wittgenstein's attitudes towards the very idea of set-theory as a possible foundation for arithmetic. The volume also includes a number of contributions on specific issues concerning Wittgenstein's views on moral and religious judgements. (shrink)

The purpose of this paper is to examine the various guidelines presented in the literature for instituting an ethics curriculum and to empirically study their effectiveness. Three questions are addressed concerning the trainability of ethics material and the proper integration and implementation of an ethics curriculum. An empirical study then tested the effect of ethics training on moral awareness and reasoning. The sample consisted of two business classes, one exposed to additional ethics curriculum (experimental), and one not exposed (control). For (...) the experimental group, ethics exercises and discussion relevant to each topic were completed. Findings suggested gender differences such that, relative to other groups, women in the experimental group showed significantly improved moral awareness and decision-making processes. An explanation of the underlying cognitive processes is presented to explain the gender effect. (shrink)

This volume recognizes and addresses the health care issues of prisoners, to establish best practices and to learn about approaches to these challenges from around the world. It presents new evidence on several emerging and classical prison health issues. The first goal of this volume is to address emerging issues related to health in prison. Second, it presents the most recent research-based evidence and translates it to the practice. The third goal, is that it allows for sufficient diversity while also (...) incorporating updates of some important already recognized prison health. The volume discusses prisons and the life and well-being of prisoners and staff, after growing problems as drug misuse (incl. tobacco smoking), infectious diseases (HIV/AIDS, hepatitis, STIs and TB), psychiatric problems, inadequate and unhealthy living conditions (incl. nutrition), overcrowding of prisons. These are addressed adequately in order to meet the international requirements of equivalence of health care. The scope of this volume is at the same type specific and diverse enough to cover the interests of a large audience that includes many types of practitioners involved in health-related issues in the field of prison health care, such as psychologists, nurses and prison administration officers responsible for health care, legal professionals and social workers. (shrink)

This book provides a rich, systematic, and accessible introduction to moral psychology, aimed at undergraduate philosophy and psychology majors. There are eight chapters, in addition to a short introduction, prospective conclusion, and extensive bibliography. The recipe for each chapter will be: a) to introduce a philosophical topic (e.g., altruism, virtue, preferences, rules) and some prominent positions on it, without assuming prior acquaintance on the part of the reader b) to canvass and explain the relevance of a particular domain of empirical (...) inquiry (e.g., evolutionary psychology, behavioral economics, neuroscience) to the topic c) to argue for some tentative conclusions about the topic d) to suggest further avenues for conceptual and empirical research The guiding theme of the book is that moral philosophy without psychological content is empty, whereas psychological investigation without philosophical insight is blind. Thus, I advocate a holistic approach that pictures moral psychology as a project of collaborative inquiry into the descriptive and normative aspects of the human condition. Ideally, students will come away from (a course built around) the book with the sense that, though philosophy may not be the queen of the sciences, its role is not merely to interpret scientific results. (shrink)

Critically evaluating and synthesizing all the previous research on the phenomenology of Czech philosopher Jan Patočka, the book brings a new voice into contemporary philosophical discussions. It elucidates the development of Patočka’s phenomenology and offers a critical appropriation of his work by connecting it with non-phenomenological approaches. The first half of the book offers a succinct, and systematizing, overview of Patočka’s phenomenology throughout its development to help readers appreciate the motives behind and grounds for its transformations. The second half systematically (...) explicates, critically examines and creatively develops Patočka’s concept of the movement of existence as the most promising part of his asubjective phenomenology. The book appeals to new readers of Patočka as well as his scholars, and to students and researchers of contemporary philosophy concerned with topics such as embodiment, personal identity, intersubjectivity, sociality, or historicity. By re-assessing Patočka’s philosophy of history and his civilizational analysis, it also helps to better articulate the question of the place of Europe in the post-European world. (shrink)

Epstein et al. fail to show that L2 learners have full access to UG because they do not explain the relationship between UG and functional categories (FCs). Nor do they provide an explanation of why learners with (supposed) full knowledge of FCs fail to use them in a native-like way.

In this paper, I describe some of what I take to be the more interesting features of friendship, then explore the extent to which other virtues can be reconstructed as sharing those features. I use trustworthiness as my example throughout, but I think that other virtues such as generosity & gratitude, pride & respect, and the producer’s & consumer’s sense of humor can also be analyzed with this model. The aim of the paper is not to demonstrate that all moral (...) virtues are exactly like friendship in all important respects, but rather to articulate a fruitful model in which to explore the virtues. Section 2 explores the relational nature of friendship, drawing on Aristotle’s discussion of friendship in the Nicomachean Ethics. Section 3 catalogues four motivations for taking seriously the friendship model of virtue. Section 4 applies the friendship model in depth to the virtue of trustworthiness. (shrink)

ZusammenfassungEine wichtige Aufgabe empirischer Sozialforschung in der Medizinethik besteht darin, bisher unbekannte ethische Probleme zu identifizieren und zu beschreiben. Die Frage, welche Sachverhalte in den Gegenstandsbereich der Medizinethik fallen, ist jedoch sowohl aus wissenschaftlicher Sicht voraussetzungsreich als auch in der Praxis umstritten. Im Beitrag werden theoretische, methodologische und forschungspraktische Aspekte der Identifikation und Auswahl ethischer Probleme diskutiert und das Vorgehen am Beispiel einer konkreten empirisch-ethischen Studie illustriert. Der Schwerpunkt des Artikels liegt hierbei auf den Vorbedingungen sowie dem konkreten Vorgehen bei (...) der Integration von Laien- und Expertenperspektive. Im ersten Teil wird zunächst vorbereitend die Frage nach der Abgrenzung zwischen ethischen Problemen und anderen praktischen Herausforderungen adressiert. Dies geschieht unter Rückgriff auf die philosophisch-ethische Systematik sowie unter Berücksichtigung des stark praxisorientierten Charakters von Medizinethik. Anschließend wird ein Vorschlag zur Unterscheidung zweier Typen ethischer Probleme gemacht und die Frage nach der Definitionsmacht zur Auszeichnung ethischer Probleme auf den spezifischen Kontext empirisch-ethischer Forschung übertragen. Aufbauend auf diesen theoretischen Überlegungen wird im dritten Abschnitt des Beitrags schließlich ein Vorgehen zur Identifikation ethischer Probleme am Beispiel des ETHICO-Projektes als einer empirisch-ethischen Interventionsstudie im Bereich der Onkologie vorgestellt. Zusammenfassend vertritt der Beitrag die These, dass die Identifikation ethischer Probleme in der Medizin ein theoretisch komplexes und methodisch anspruchsvolles Unterfangen ist, bei dem nicht allein die Perspektive philosophischer Theorie eingenommen werden sollte, sondern vielmehr Formen der Integration von Laien- und Expertenperspektive entwickelt werden müssen. (shrink)

Experimental moral philosophy emerged as a methodology in the last decade of the twentieth century, as a branch of the larger experimental philosophy (X-Phi) approach. Experimental moral philosophy is the empirical study of moral intuitions, judgments, and behaviors. Like other forms of experimental philosophy, it involves gathering data using experimental methods and using these data to substantiate, undermine, or revise philosophical theories. In this case, the theories in question concern the nature of moral reasoning and judgment; the extent and sources (...) of moral obligations; the nature of a good person and a good life; even the scope and nature of moral theory itself. This entry begins with a brief look at the historical uses of empirical data in moral theory and goes on to ask what, if anything, is distinctive about experimental moral philosophy—how should we distinguish it from related work in empirical moral psychology? After discussing some strategies for answering this question, the entry examines two of the main projects within experimental moral philosophy, and then discusses some of the most prominent areas of research within the field. As we will see, in some cases experimental moral philosophy has opened up new avenues of investigation, while in other cases it has influenced longstanding debates within moral theory. (shrink)

Since its inception in the Middle Ages, the university classroom can be characterized by students gathered around a sage who imparts his or her knowledge. However, the effective classroom of today looks vastly different: First-year engineering students not only learn basic engineering principles, but are also guided to consider their own inner values and motivations as they design and build adaptive devices for people with disabilities; students in a large chemistry lecture work animatedly together in small groups on inquiry-based activities (...) while an instructor and teaching assistants circulate and guide their learning; students learning differential equations practice explicit metacognitive skills while problem-solving in class. Even though educational research, especially research that is targeted at STEM disciplines, demonstrates what most effectively engages students and supports their learning, many of today's classrooms look much like they did a century ago, with a professor delivering a primarily one-way lecture and students passively sitting in seats bolted to the floor. At this juncture in history, colleges and universities face a public call to engage a more diverse representation of students in effective learning, persistence, and degree attainment, and to do so economically and efficiently. It is essential that institutions draw upon methods demonstrated to effectively increase student learning and success. Educational researchers have thoroughly explored the "basic" science in this area, and a body of literature documents effective evidence-based instructional practices, hereafter referred to as EBIPs. (shrink)

We live in a world where it is impossible to exist without, and beyond, technologies. Despite this omnipresence, we tend to overlook their influence on us. The vigorously developing approach of postphenomenology, combining insights from phenomenology and pragmatism, focuses on the so-called technological mediation, i.e., on how technologies as mediators of human-world relations influence the appearing of both the world and the human beings in it. My analysis aims at demonstrating both the methodological weaknesses and open possibilities of postphenomenology. After (...) summarizing its essentials, I will scrutinize, first, its ability to turn to the technological things themselves and, second, the so-called empirical turn as realized by postphenomenology. By assessing its conceptual framework from the phenomenological perspective, I hope to demonstrate that postphenomenology needs philosophical clarification and strengthening. In short, it needs a more phenomenological, and less pragmatic, approach to technology in its influence on human experience. (shrink)

This paper brings together two erstwhile distinct strands of philosophical inquiry: the extended mind hypothesis and the situationist challenge to virtue theory. According to proponents of the extended mind hypothesis, the vehicles of at least some mental states (beliefs, desires, emotions) are not located solely within the confines of the nervous system (central or peripheral) or even the skin of the agent whose states they are. When external props, tools, and other systems are suitably integrated into the functional apparatus of (...) the agent, they are partial bearers of her cognitions, motivations, memories, and so on. According to proponents of the situationist challenge to virtue theory, dispositions located solely within the confines of the nervous system (central or peripheral) or even the skin of the agent to whom they are attributed typically do not meet the normative standards associated with either virtue or vice (moral, epistemic, or otherwise) because they are too susceptible to moderating external variables, such as mood modulators, ambient sensibilia, and social expectation signaling. We here draw on both of these literatures to formulate two novel views – the embedded and extended character hypotheses – according to which the vehicles of not just mental states but longer-lasting, wider-ranging, and normatively-evaluable agentic dispositions are sometimes located partially beyond the confines of the agent’s skin. (shrink)

Hobbes emphasized that the state of nature is a state of war because it is characterized by fundamental and generalized distrust. Exiting the state of nature and the conflicts it inevitably fosters is therefore a matter of establishing trust. Extant discussions of trust in the philosophical literature, however, focus either on isolated dyads of trusting individuals or trust in large, faceless institutions. In this paper, I begin to fill the gap between these extremes by analyzing what I call the topology (...) of communities of trust. Such communities are best understood in terms of interlocking dyadic relationships that approximate the ideal of being symmetric, Euclidean, reflexive, and transitive. Few communities of trust live up to this demanding ideal, and those that do tend to be small (between three and fifteen individuals). Nevertheless, such communities of trust serve as the conditions for the possibility of various important prudential epistemic, cultural, and mental health goods. However, communities of trust also make possible various problematic phenomena. They can become insular and walled-off from the surrounding community, leading to distrust of out-groups. And they can lead their members to abandon public goods for tribal or parochial goods. These drawbacks of communities of trust arise from some of the same mecha-nisms that give them positive prudential, epistemic, cultural, and mental health value – and so can at most be mitigated, not eliminated. (shrink)

In this largely antimetaphysical treatment of free will and determinism, Mark Balaguer argues that the philosophical problem of free will boils down to an open scientific question about the causal histories of certain kinds of neural events. In the course of his argument, Balaguer provides a naturalistic defense of the libertarian view of free will. The metaphysical component of the problem of free will, Balaguer argues, essentially boils down to the question of whether humans possess libertarian free will. Furthermore, (...) he argues that, contrary to the traditional wisdom, the libertarian question reduces to a question about indeterminacy--in particular, to a straightforward empirical question about whether certain neural events in our heads are causally undetermined in a certain specific way; in other words, Balaguer argues that the right kind of indeterminacy would bring with it all of the other requirements for libertarian free will. Finally, he argues that because there is no good evidence as to whether or not the relevant neural events are undetermined in the way that's required, the question of whether human beings possess libertarian free will is a wide-open empirical question. (shrink)