An important application of ultrafilters is in the ultraproduct construction in model theory. In this paper we study ultraproducts of countable structures, whose universe we assume is ω, using ultrafilters on a countable index set, which we also assume to be ω. Many of the properties of the ultraproduct are in fact inherent properties of the ultrafilter. For example, if we take a sequence of countable linear orders without maximal element, then their ultraproduct will have no maximal element, and we (...) can ask what its cofinality is. This cardinal depends only on the ultrafilter; it does not depend on what linear orders comprise the factors. (shrink)

If $\mathcal{F}$ is a filter on $\omega$, we say that $\mathcal{F}$ is Canjar if the corresponding Mathias forcing does not add a dominating real. We prove that any Borel Canjar filter is $F_{\sigma}$, solving a problem of Hrušák and Minami. We give several examples of Canjar and non-Canjar filters; in particular, we construct a $\mathsf{MAD}$ family such that the corresponding Mathias forcing adds a dominating real. This answers a question of Brendle. Then we prove that in (...) all the “classical” models of $\mathsf{ZFC}$ there are $\mathsf{MAD}$ families whose Mathias forcing does not add a dominating real. We also study ideals generated by branches, and we uncover a close relation between Canjar ideals and the selection principle $S_{\mathrm{fin}}$ on subsets of the Cantor space. (shrink)

Because of the difficulty posed by the contrast between the search for truth and truth itself, Michael Polanyi believes that we must alter the foundation of epistemology to include as essential to the very nature of mind, the kind of groping that constitutes the recognition of a problem. This collection of essays, assembled by Marjorie Grene, exemplifies the development of Polanyi's theory of knowledge which was first presented in _Science, Faith, and Society_ and later systematized in _Personal Knowledge_. Polanyi (...) believes that the dilemma of the modern mind arises from the peculiar relation between the positivist claim for total objectivity in scientific knowledge and the unprecedented moral dynamism characterizing the social and political aspirations of the last century. The first part of _Knowing and Being_ deals with this theme. Part two develops Polanyi's idea that centralization is incompatible with the life of science as well as his views on the role of tradition and authority in science. The essays on tacit knowing in Part Three proceed directly from his preoccupation with the nature of scientific discovery and reveal a pervasive substructure of all intelligent behavior. Polanyi believes that all knowing involves movement from internal clues to external evidence. Therefore, to explain the process of knowing, we must develop a theory of the nature of living things in general, including an account of that aspect of living things we call "mind." Part Four elaborates upon this theme. (shrink)

My main contentions here are as follows. First, Huemer has not provided a satisfactory account of what seemings, in his sense, are. Secondly, consideration of mental states that do not involve any (non-cognitive) qualia provides grounds for concluding that Huemerian seemings do not exist. Thirdly, both versions of Huemer’s Principle of Phenomenal Conservatism suffer from justificatory permissiveness that arises out of failures to distinguish, first, between basic and derived seemings, and, secondly, between qualia-involving and qualia-free seemings. Fourthly, Huemer’s contention that (...) denial of the Principle of Phenomenal Conservatism is self-defeating is clearly mistaken, since one can, using the idea of basic seemings, formulate a Restricted Principle of Phenomenal Conservatism that is, in fact, more plausible that Huemer’s unrestricted principle. Finally, I argue, briefly, that direct awareness or direct acquaintance approaches to the foundations of justification are superior to approaches based on a Principle of Phenomenal Conservatism, either restricted or unrestricted. (shrink)

Michael Psellos has long been known as a key figure in the history of Byzantine literary and intellectual culture, but his theoretical and critical reflections on literature and art are little known outside of a small circle of specialists. Most famous for his Chronographia, a history of eleventh-century Byzantine emperors and their reigns, Psellos also excelled in describing as well as prescribing practices and rules for literary discourse and visual culture. The ambition of Michael Psellos on Literature and (...) Art is to illustrate an important chapter in the history of Greek literary and art criticism and introduce precisely this aspect of Psellian writing to a wider public. The editors of this volume present thirty Psellian texts, all of which have been translated - some in part, most in their entirety - into English. In the majority of cases, the works are translated for the first time in any modern language, and several are discussed at length here for the first time. They are grouped into two separate sections, which roughly translate to two areas of theoretical reflection associated with the modern terms 'literature' and 'art.'0. (shrink)

[Michael Williams] A response to Sosa's criticisms of Sellars's account of the relation between knowledge and experience, noting that Sellars excludes merely animal knowledge, and hopes to bypass epistemology by an adequate philosophy of mind and language. /// [Ernest Sosa] I give an exposition and critical discussion of Sellars's Myth of the Given, and especially of its epistemic side. In later writings Sellars takes a pragmatist turn in his epistemology. This is explored and compared with his earlier critique of (...) givenist mythology. In response to Michael Williams, it is argued that these issues are importantly independent of philosophy of language or mind, and that my own take on them does not commit me to any absurd radical foundationalism on language or mind. My own take is in line with Descartes' two-level epistemology of cognitio and scientia, a bifurcation that protects him from vicious circularity, and is adaptable for an epistemology naturalized, whether in the way of Quine, or Moore, or Davidson. (shrink)

In the West, Harvard philosopher Michael Sandel is a thinker of unusual prominence. In China, he's a phenomenon, greeted by vast crowds. China Daily reports that he has acquired a popularity "usually reserved for Hollywood movie stars." China Newsweek declared him the "most influential foreign figure" of the year. In Sandel the Chinese have found a guide through the ethical dilemmas created by the nation's swift embrace of a market economy--a guide whose communitarian ideas resonate with aspects of China's (...) own rich and ancient philosophical traditions. Chinese citizens often describe a sense that, in sprinting ahead, they have bounded past whatever barriers once held back the forces of corruption and moral disregard. The market economy has lifted millions from poverty but done little to define ultimate goals for individuals or the nation. Is the market all there is? In this context, Sandel's charismatic, interactive lecturing style, which roots moral philosophy in real-world scenarios, has found an audience struggling with questions of their responsibility to one another. Encountering China brings together leading experts in Confucian and Daoist thought to explore the connections and tensions revealed in this unlikely episode of Chinese engagement with the West. The result is a profound examination of diverse ideas about the self, justice, community, gender, and public good. With a foreword by Evan Osnos that considers Sandel's fame and the state of moral dialogue in China, the book will itself be a major contribution to the debates that Sandel sparks in East and West alike.--. (shrink)

Tradução de “What is a philosophical question?”, de Michael Dummett, por Eros M. Carvalho (UFRGS). Texto originalmente publicado em: Dummett, M. The nature and future of philosophy (New York: Columbia University Press, 2010, p. 8-12). Michael Dummett (1925-2011) foi professor de filosofia na Universidade de Oxford, Inglaterra. O que é uma questão filosófica? Michael Dummett Acerca do que é a filosofia? Para Quine e alguns filósofos americanos contemporâneos, a filosofia é simplesmente a parte….

At the turn of the 21st century, Susan Leigh Anderson and Michael Anderson conceived and introduced the Machine Ethics research program, that aimed to highlight the requirements under which autonomous artificial intelligence systems could demonstrate ethical behavior guided by moral values, and at the same time to show that these values, as well as ethics in general, can be representable and computable. Today, the interaction between humans and AI entities is already part of our everyday lives; in the near (...) future it is expected to play a key role in scientific research, medical practice, public administration, education and other fields of civic life. In view of this, the debate over the ethical behavior of machines is more crucial than ever and the search for answers, directions and regulations is imperative at an academic, institutional as well as at a technical level. Our discussion with the two inspirers and originators of Machine Ethics highlights the epistemological, metaphysical and ethical questions arising by this project, as well as the realistic and pragmatic demands that dominate artificial intelligence and robotics research programs. Most of all, however, it sheds light upon the contribution of Susan and Michael Anderson regarding the introduction and undertaking of a main objective related to the creation of ethical autonomous agents, that will not be based on the “imperfect” patterns of human behavior, or on preloaded hierarchical laws and human-centric values. (shrink)

Michael L. Morgan is Emeritus Chancellor Professor at Indiana University and the Grafstein Visiting Chair in Jewish Philosophy at the University of Toronto. He has written extensively on ancient Greek philosophy, modern Jewish philosophy, and post-Holocaust theology and ethics.

Michael Oakeshott (1901-90) made his reputation as a political philosopher, but for a long time it seemed as if he had little interest in politics before 1945. His major pre-war work, Experience and its Modes (1933) was an examination of the nature of philosophy and its relation to other forms of thought that made almost no mention of politics. However, it has become increasingly clear that this initial judgment was misleading. A posthumous collection of early essays, Religion, Politics, and (...) the Moral Life (1993), proved that political philosophy was a lifelong concern. Nevertheless, the belief that Oakeshott was relatively uninterested in politics, at least in the 1920s, has persisted. This volume dispels that notion for good. It contains two previously unpublished works, a manuscript entitled 'A Discussion of some Matters preliminary to the Study of Political Philosophy', and the first version of a course of lectures on 'The Philosophical Approach to Politics' that Oakeshott gave between 1928 and 1930. These works establish that politics was a central concern in the first decade of his intellectual career, and show beyond any doubt that the ideas of Experience and its Modes actually grew out of Oakeshott's prior philosophical interest in politics. (shrink)

Michael Ryan (d. 1840) remains one of the most mysterious figures in the history of medical ethics, despite the fact that he was the only British physician during the middle years of the 19th century to write about ethics in a systematic way. Michael Ryan’s Writings on Medical Ethics offers both an annotated reprint of his key ethical writings, and an extensive introductory essay that fills in many previously unknown details of Ryan’s life, analyzes the significance of his (...) ethical works, and places him within the historical trajectory of the field of medical ethics. (shrink)

This is an obituary for Michael H. Robins.

Von allen Briefwechseln, die Bernard Bolzano (1781-1848) führte, war der mit seinem Schüler und Freund Michael Josef Fesl (1788-1864) bei weitem der umfangreichste. Insgesamt tauschten die beiden etwa 730 Briefe aus. Da wegen der großen Zahl der Briefe in der Bernard-Bolzano-Gesamtausgabe ab dem Jahr 1831 nur noch die Briefe des Lehrers an seinen Schüler veröffentlicht werden, erscheinen die Briefe Fesls an Bolzano in den Beiträgen zur Bolzano-Forschung. Der vorliegende Band enthält Fesls Briefe der Jahre 1837-1838. Wie in den vorangegangenen (...) Jahren stehen Bolzanos Werke im Mittelpunkt des geistigen Austauschs, insbesondere die 1837 und 1838 erschienenen Bücher. Auch die Beschäftigung mit aktuellen Entwicklungen und Problemen nimmt in diesen Briefen wieder einen gewissen Raum ein, nicht zuletzt mit solchen, die - wie die »Kölner Wirren« und der Mischehenstreit - die katholische Kirche betrafen, aber auch mit politischen Auseinandersetzungen sowie mit Fragen der Zensur. (shrink)

Michael Walzer is currently at the School of Social Science, Institute for Advanced Study, in Princeton, New Jersey. Professor Walzer has written Just and Unjust Wars; The Revolution of the Saints and has edited Toward A Global Civil Society. In this interview, he discusses some of the current concerns about education, political theory and the current state of the art of toleration, and acceptance and accommodation of different racial, ethnic, social and minority groups. He has published extensively and his (...) work has been translated in several other languages. In this interview, he responds to questions about his work, his writings and his current concerns. (shrink)

Michael Schmitz has written a critical review of my account. I appreciate his ideas and his friendly way of addressing my work. In this response I will focus on some of his critical points and consider their tenability.

Bart Pattyn: Needless to say, we are more than pleased with the willingness of Michael Walzer to be here in Leuven. After the stimulating lecture yesterday we now have the opportunity to pose some questions to Michael Walzer in the same room where we talked with his friend, Harry Frankfurt, as well as with Bernard Williams. I have asked Professor Selling to moderate this discussion which I am sure he will do with a firm hand.Joseph Selling: We have (...) two papers which Prof. Walzer, and many of you, have read in advance. Perhaps we can take the questions from the authors of those papers and then take other questions. (shrink)

This article explores the relationships between legal proof and fundamental epistemic concepts such as knowledge and justification. A survey of the legal literature reveals a confusing array of seemingly inconsistent proposals and presuppositions regarding these relationships. This article makes two contributions. First, it reconciles a number of apparent inconsistencies and tensions in accounts of the epistemology of legal proof. Second, it argues that there is a deeper connection between knowledge and legal proof than is typically argued for or presupposed in (...) the legal literature. This connection is illustrated through a discussion of the Gettier problem in epistemology. It is argued that the gap or disconnect between truth and justification that undermines knowledge in Gettier cases also potentially undermines the success of legal verdicts. (shrink)

Michael Tooley presents a major new philosophical theory of the nature of time, offering a powerful alternative to the traditional "tensed" and recent "tenseless" accounts of time. He argues for a dynamic conception of the universe, in which past, present, and future are not merely subjective features of experience. He claims that the past and the present are real, while the future is not. Tooley's approach accounts for time in terms of causation. He therefore claims that the key to (...) understanding the dynamic nature of the universe is to understand the nature of causation. Time, Tense, and Causation is a landmark treatment of one of the oldest and most perplexing intellectual problems, and will be fascinating reading for anyone interested in the character of time. (shrink)

A scholastic-Cartesian schema faithfully maps ordinary, effective ways of dealing with intentionality; yet its apparent incoherence provokes philosophers into opting for one of two stances, 'Cartesian' or 'direct realist', seemingly incompatible, yet each seem in accord with ordinary thought. A wide range of canonical and current theories, realist, idealist and hybrid, essentially involve one option or the other. We should instead consider why the language of intentionality, with its apparent anomalies, works so well. Released from the obligation to opt for (...) one stance over the other, we can identify a robust realism different in kind from anything currently on offer. (shrink)

If observation is ‘theory-laden’, how can there be ‘observationally equivalent theories’? How can the observations ‘laden’ by one theory be ‘the same as’ those ‘laden’ by another? The answer might lie in the expressibility of observationally equivalent theories in a common mathematical formalism.