This looks at three educational developments influenced by the idealism of T H Green and others. One was progressive education - under Holmes and Nunn, another the pursuit of understanding for its own sake, and the third education for a participatory democracy. John Dewey had a role in both the last two.

John Hyman explores central problems in philosophy of action and the theory of knowledge, and connects these areas of enquiry in a new way. His approach to the dimensions of human action culminates in an original analysis of the relation between knowledge and rational behaviour, which provides the foundation for a new theory of knowledge itself.

John Gibbons presents an original account of epistemic normativity. Belief seems to come with a built-in set of standards or norms. One task is to say where these standards come from. But the more basic task is to say what those standards are. In some sense, beliefs are supposed to be true. Perhaps they’re supposed to constitute knowledge. And in some sense, they really ought to be reasonable. Which, if any of these is the fundamental norm of belief? The (...) book argues against the teleological or instrumentalist conception of rationality that sees being reasonable as a means to our more objective aims, either knowledge or truth. And it tries to explain both the norms of knowledge and of truth in terms of the fundamental norm, the one that tells you to be reasonable. The importance of being reasonable is not explained in terms of what it will get you, or what you think it will get you, or what it would get you if only things were different. The requirement to be reasonable comes from the very idea of what a genuine requirement is. That’s where the built-in standards governing belief come from, and that’s what they are. (shrink)

Do we know what we're doing, and why? Psychological research seems to suggest not: reflection and self-awareness are surprisingly uncommon and inaccurate. John M. Doris presents a new account of agency and responsibility, which reconciles our understanding of ourselves as moral agents with empirical work on the unconscious mind.

The esteemed psychologist and thinker John Dewey headed for previously unexplored philosophical territory with this influential work. Written shortly after World War I, it embodies Dewey's system of pragmatic humanism and maintains that individuals can attain "a more ordered and intelligent happiness" by reconsidering the ultimate effects of their deepest beliefs and feelings. With its promise of achieving an understanding of the past and attaining a brighter future, Reconstruction in Philosophy remains ever relevant. "A modern classic." — Philosophy and (...) Phenomenological Research. (shrink)

Contributors: Steven M. Cahn, James W. Nickel, J. L. Cowan, Paul W. Taylor, Michael D. Bayles, William A. Nunn III, Alan H. Goldman, Paul Woodruff, Robert A. Shiver, Judith Jarvis Thomson, Robert Simon, George Sher, Robert Amdur, Robert K. Fullinwider, Bernard R. Boxhill, Lisa H. Newton, Anita L. Allen, Celia Wolf-Devine, Sidney Hook, Richaed Waaserstrom, Thomas E. Hill, Jr., John Kekes.

Presents John Locke's seventeenth-century classic work on political and social theory; and includes a history of the text, as well as notes and a bibliography.

John Carroll undertakes a careful philosophical examination of laws of nature, causation, and other related topics. He argues that laws of nature are not susceptible to the sort of philosophical treatment preferred by empiricists. Indeed he shows that emperically pure matters of fact need not even determine what the laws are. Similar, even stronger, conclusions are drawn about causation. Replacing the traditional view of laws and causation requiring some kind of foundational legitimacy, the author argues that these phenomena are (...) inextricably intertwined with everything else. This distinctively clear and detailed discussion of what it is to be a law will be valuable to a broad swathe of philosophers in metaphysics, the philosophy of mind, and the philosophy of science. (shrink)

An Essay Concerning Human Understanding is a work by John Locke concerning the foundation of human knowledge and understanding. It first appeared in 1689 (although dated 1690) with the printed title An Essay Concerning Humane Understanding. He describes the mind at birth as a blank slate (tabula rasa, although he did not use those actual words) filled later through experience. The essay was one of the principal sources of empiricism in modern philosophy, and influenced many enlightenment philosophers, such as (...) David Hume and George Berkeley. (shrink)

This book redraws the intellectual map and sets the agenda in philosophy for the next fifty or so years. By making the theory of signs the dominant theme in Four Ages of Understanding, John Deely has produced a history of philosophy that is innovative, original, and complete. The first full-scale demonstration of the centrality of the theory of signs to the history of philosophy, Four Ages of Understanding provides a new vantage point from which to review and reinterpret the (...) development of intellectual culture at the threshold of "globalization". Deely examines the whole movement of past developments in the history of philosophy in relation to the emergence of contemporary semiotics as the defining moment of Postmodernism. Beginning traditionally with the Pre-Socratic thinkers of early Greece, Deely gives an account of the development of the notion of signs and of the general philosophical problems and themes which give that notion a context through four ages: Ancient philosophy, covering initial Greek thought; the Latin age, philosophy in European civilization from Augustine in the 4th century to Poinsot in the 17th; the Modern period, beginning with Descartes and Locke; and the Postmodern period, beginning with Charles Sanders Peirce and continuing to the present. Reading the complete history of philosophy in light of the theory of the sign allows Deely to address the work of thinkers never before included in a general history, and in particular to overcome the gap between Ockham and Descartes which has characterized the standard treatments heretofore. One of the essential features of the book is the way in which it shows how the theme of signs opens a perspective for seeing the Latin Age from its beginning with Augustine to the work of Poinsot as an indigenous development and organic unity under which all the standard themes of ontology and epistemology find a new resolution and place. A magisterial general history of philosophy, Deely's book provides both a strong background to semiotics and a theoretical unity between philosophy's history and its immediate future. With Four Ages of Understanding Deely sets a new agenda for philosophy as a discipline entering the 21st century. (shrink)

Isaiah Berlin was the greatest intellectual historian of the twentieth century. But his work also made an original and important contribution to moral and political philosophy and to liberal theory. In 1921, at the age of eleven, Isaiah Berlin arrived in England from Riga, Latvia. By the time he was thirty he was at the heart of British intellectual life. He has remained its commanding presence ever since, and few would dispute that he was one of Britain's greatest thinkers. His (...) reputation extends worldwide--as a great conversationalist, intellectual historian, and man of letters. He has been called the century's most inspired reader. Yet Berlin's contributions to thought--in particular to moral and political philosophy, and to liberal theory--are little understood, and surprisingly neglected by the academic world. In this book, they are shown to be animated by a single, powerful, subversive idea: value-pluralism which affirms the reality of a deep conflict between ultimate human values that reason cannot resolve. Though bracingly clear-headed, humane and realist, Berlin's value-pluralism runs against the dominant Western traditions, secular and religious, which avow an ultimate harmony of values. It supports a highly distinctive restatement of liberalism in Berlin's work--an agnostic liberalism, which is founded not on rational choice but on the radical choices we make when faced with intractable dilemmas. It is this new statement of liberalism, the central subject of John Gray's lively and lucid book, which gives the liberal intellectual tradition a new lease on life, a new source of life, and which comprises Berlin's central and enduring legacy. In a new introduction, Gray argues that, in a world in which human freedom has spread more slowly than democracy, Berlin's account of liberty and basic decency is more instructive and useful than ever. (shrink)

John Coggon argues that the important question for analysts in the fields of public health law and ethics is 'what makes health public?' He offers a conceptual and analytic scrutiny of the salient issues raised by this question, outlines the concepts entailed in, or denoted by, the term 'public health' and argues why and how normative analyses in public health are inquiries in political theory. The arguments expose and explain the political claims inherent in key works in public health (...) ethics. Coggon then develops and defends a particular understanding of political liberalism, describing its implications for critical study of public health policies and practices. Covering important works from legal, moral, and political theory, public health, public health law and ethics, and bioethics, this is a foundational text for scholars, practitioners and policy bodies interested in freedoms, rights and responsibilities relating to health. (shrink)

How do laws resemble rules of games, moral rules, personal rules, rules found in religious teachings, school rules, and so on? Are laws rules at all? Are they all made by human beings? And if so how should we go about interpreting them? How are they organized into systems, and what does it mean for these systems to have 'constitutions'? Should everyone want to live under a system of law? Is there a special kind of 'legal justice'? Does it consist (...) simply in applying the law of the system? And how does it relate to the ideal of 'the rule of law'?These and other classic questions in the philosophy of law form the subject-matter of Law as a Leap of Faith. In this book John Gardner collects, revisits, and supplements fifteen years of celebrated writings on general questions about law and legal systems - writings in which he attempts, without loss of philosophical finesse or insight, to cut through some of the technicalities with which the subject has become encrusted in the late twentieth century. Taking his agenda broadly from H.L.A. Hart's The Concept of Law, Gardner shows how the key ideas in that work live on, and how they have been and can still be improved in modest ways to meet important criticisms - in some cases by concession, in some cases by circumvention, and in some cases by restatement. In the process Gardner engages with key ideas of other modern giants of the subject including Kelsen, Holmes, Raz, and Dworkin. Most importantly he presents the main elements of his own unique and refreshingly direct way of thinking about law, brought together in one place for the first time. (shrink)

John Locke proposed a straightforward relationship between qualitative and quantitative doxastic notions: belief corresponds to a sufficiently high degree of confidence. Richard Foley has further developed this Lockean thesis and applied it to an analysis of the preface and lottery paradoxes. Following Foley's lead, we exploit various versions of these paradoxes to chart a precise relationship between belief and probabilistic degrees of confidence. The resolutions of these paradoxes emphasize distinct but complementary features of coherent belief. These features suggest principles (...) that tie together qualitative and quantitative doxastic notions. We show how these principles may be employed to construct a quantitative model - in terms of degrees of confidence - of an agent's qualitative doxastic state. This analysis fleshes out the Lockean thesis and provides the foundation for a logic of belief that is responsive to the logic of degrees of confidence. (shrink)

John Passmore was a renowned Australian empirical philosopher and historian of ideas. In this book, which was originally published in 1952, Passmore's intention was to disentangle certain main themes in Hume's philosophy and to show how they relate to Hume's main philosophic purpose. Rather than offering a detailed commentary, the text provides an account based on specificity and critical scholarship, seeking to complement the other more comprehensive works on Hume's philosophy that had become available around the same time. This (...) book will be of value to anyone with an interest in perspectives on Hume and Passmore's philosophical approach. (shrink)

John Cottingham explores central areas of Descartes's rich and wide-ranging philosophical system, including his accounts of thought and language, of freedom and action, of our relationship to the animal domain, and of human morality and the conduct of life. He also examines ways in which his philosophy has been misunderstood. The Cartesian mind-body dualism that is so often attacked is only a part of Descartes's account of what it is to be a thinking, sentient, human creature, and the way (...) he makes the division between the mental and the physical is considerably more subtle, and philosophically more appealing, than is generally assumed. Although Descartes is often considered to be one of the heralds of our modern secular worldview, the 'new' philosophy which he launched retains many links with the ideas of his predecessors, not least in the all-pervasive role it assigns to God (something that is ignored or downplayed by many modern readers); and the character of the Cartesian outlook is multifaceted, sometimes anticipating Enlightenment ideas of human autonomy and independent scientific inquiry, but also sometimes harmonizing with more traditional notions of human nature as created to find fulfilment in harmony with its creator. (shrink)

Broaching an understanding of nature in Platonic thought, John Sallis goes beyond modern conceptions and provides a strategy to have recourse to the profound sense of nature operative in ancient Greek philosophy. In a rigorous and textually based account, Sallis traces the complex development of the Greek concept of nature. Beginning with the mythical vision embodied in the figure of the goddess Artemis, he reanimates the sense of nature that informs the fragmentary discourses of Anaximenes, Heraclitus, Parmenides, and Empedocles (...) and shows how Plato takes up pre-Socratic conceptions critically while also being transformed. Through Sallis’s close reading of the Theaetetus and the Phaedo, he recovers the profound and comprehensive concept of nature in Plato’s thought. (shrink)

John Foster presents a penetrating investigation into the question: what is it to perceive a physical object? Is perceptual contact with a physical object, he asks, something fundamental, or does it break down into further factors? If the latter, what are these factors, and how do they combine to secure the contact? For most of the book, Foster addressed these questions in the framework of a realist view of the physical world. But the arguments which thereby unfold - arguments (...) which undermine direct realism and establish a version of the sense-datum theory - lead to the conclusion that we do no perceive physical objects at all. The only way to avoid this conclusion is by abandoning physical realism for a form of idealism, and this is the option which Foster finally embraces. The Nature of Perception makes an important contrbution to the ongoing debate: it sheds fresh light on the traditional issues, and breathes new life into positions which most current philosophers assumeto be dead. (shrink)

The theory of evolution by natural selection did not spring fully formed and unprecedented from the brain of Charles Darwin. The idea of evolution had been around, in various guises, since the time of Ancient Greece. And nor did theorizing about evolution stop with what Daniel Dennett called "Darwin's dangerous idea." In this riveting new book, bestselling science writers John and Mary Gribbin explore the history of the idea of evolution, showing how Darwin's theory built on what went before (...) and how it was developed in the twentieth century, through an understanding of genetics and the biochemical basis of evolution, into the so-called "modern synthesis" and beyond. Darwin deserves his recognition as the primary proponent of the idea of natural selection, but as the authors show, his contribution was one link in a chain that extends back into antiquity and is still being forged today. (shrink)

John Rawls begins a Theory of Justice with the observation that 'Justice is the first virtue of social institutions, as truth is of systems of thought… Each person possesses an inviolability founded on justice that even the welfare of society as a whole cannot override'1. The COVID-19 pandemic has resulted in lock-downs, the restriction of liberties, debate about the right to refuse medical treatment and many other changes to the everyday behaviour of persons. The justice issues it raises are (...) diverse, profound and will demand our attention for some time. How we can respect the Rawlsian commitment to the inviolability of each person, when the welfare of societies as a whole is under threat goes to the heart of some of the difficult ethical issues we face and are discussed in this issue of the Journal of Medical Ethics. The debate about ICU triage and COVID-19 is quite well developed and this journal has published several articles that explore aspects of this issue and how different places approach it.2–5 Newdick et al add to the legal analysis of triage decisions and criticise the calls for respecting a narrow conception of a legal right to treatment and more detailed national guidelines for how triage decisions should be made.6 They consider scoring systems for clinical frailty, organ failure assessment, and raise some doubts about the fairness of their application to COVID-19 triage situations. Their argument seems to highlight instances of what is called the McNamara fallacy. US Secretary of Defense Robert McNamara used enemy body counts as a measure …. (shrink)

Research Articles John Tomasi, Social Philosophy and Policy, FirstView Article.

John Passmore was a renowned Australian empirical philosopher and historian of ideas. In this book, which was originally published in 1952, Passmore's intention was to disentangle certain main themes in Hume's philosophy and to show how they relate to Hume's main philosophic purpose. Rather than offering a detailed commentary, the text provides an account based on specificity and critical scholarship, seeking to complement the other more comprehensive works on Hume's philosophy that had become available around the same time. This (...) book will be of value to anyone with an interest in perspectives on Hume and Passmore's philosophical approach. (shrink)

Late in his life, Hans-Georg Gadamer was asked to explain what the universal aspect of hermeneutics consisted in, and he replied, enigmatically, “in the _verbum interius_.” Gadamer devoted a pivotal section of his magnum opus, _Truth and Method_, to this Augustinian concept, and subsequently pointed to it as a kind of passkey to his thought. It remains, however, both in its origins and its interpretations, a mysterious concept. From out of its layered history, it remains a provocation to thought, expressing (...) something about the relation of language and understanding that has yet to be fully worked out. The scholastic idea of a word that is fully formed in the mind but not articulated served Augustine as an analogy for the procession of the Trinity, and served Thomas Aquinas as an analogy for the procession between divine ideas and human thought. Gadamer turned the analogy on its head by using the verbum interius to explain the obscure relation between language and human understanding. His learned interpretation of the idea of the inner word through Neoplatonism, Lutheranism, idealism, and historicism may seem nearly as complex as the medieval source texts he consulted and construed in his exegesis, but the profoundity of his insights are unquestioned. In unpacking Gadamer's interpretive feat, John Arthos provides an overview of the philosophy of the logos out of which the _verbum interius_ emerged. He summarizes the development of the _verbum _in ancient and medieval doctrine, traces its path through German thought, and explains its relevance to modern hermeneutic theory. His work unfolds in two parts, as an expansive intellectual history and as a close analysis and commentary on source texts on the inner word, from Augustine to Gadamer. As such, this book serves as an indispensable guide and reference for hermeneutics and the intellectual traditions out of which it arose, as well as an original theoretical statement in its own right. “Consummately researched, lucidly written, and persuasively argued throughout, __The Inner Word_ _succeeds brilliantly in bringing to light this neglected but pivotal matter in Gadamer’s work. Arthos is learned in the best ‘humanist’ way, for he succeeds in creating something new of his own that will speak eloquently to all of us.” —_Walter Jost, University of Virginia_ “Gadamer suggests that the Christian idea of incarnation is a key to his hermeneutics, but does not explain his position in a detailed or systematic manner. Arthos brings his considerable knowledge of hermeneutics and rhetoric to bear on Gadamer's insight, recounting the rich intellectual history to which Gadamer gestures, and providing an extended and detailed exegesis of this pivotal point in the third part of _Truth and Method_. Gadamer's account of 'linguisticality,' Arthos explains, can best be understood through his use of a complex metaphor—the ‘inner word.’ Arthos matches his erudition with clear and clean prose, and his account exemplifies, rather than just describes, Gadamer's hermeneutical philosophy. Any scholar interested in Gadamer's philosophy should have this book on his or her shelf.” —_Francis J. Mootz III, William S. Boyd Professor of Law, William S. Boyd School of Law_ “Arthos's strength lies for me in his careful reading of the sources. He effectively commands the literature on the subject. This work shows in a sophisticated way the legacy of trinitarian theology for philosophical hermeneutics. The very complex task of illuminating the phenomenon of the _verbum interius _and indicating its centrality for philosophical hermeneutics is accomplished by John Arthos with great sensitivity to the subject matter.” —_Andrzej Wiercinski, The International Institute for Hermeneutics_. (shrink)

'John Toland's Letters to Serena' is one of the most important texts of the early Enlightenment. Synthesizing an array of European thought, the Letters was not only significant for Toland's own 'freethinking' cause, but also provided crucial foundations for the 'vitalist' materialism characterising later Enlightenment thought.

John Wilson; Does Equality (of Opportunity) Make Sense in Education?, Journal of Philosophy of Education, Volume 25, Issue 1, 30 May 2006, Pages 27–32, https://.

Collected here in a single volume for the first time, On Liberty, Utilitarianism, Considerations on Representative Government, and The Subjection of Women show Mill applying his liberal utilitarian philosophy to a range of issues that remain vital today - issues of the nature of ethics, the scope and limits of individual liberty, the merits of and costs of democratic government, and the place of women in society. In his Introduction John Gray describes these essays as applications of Mill's doctrine (...) of the Art of Life, as set out in A System of Logic. Using the resources of recent revisionist scholarship, he shows Mill's work to be far richer and subtler than traditional interpretations allow. (shrink)

John J. Stuhr, a leading voice in American philosophy, sets forth a view of pragmatism as a personal work of art or fashion. Stuhr develops his pragmatism by putting pluralism forward, setting aside absolutism and nihilism, opening new perspectives on democracy, and focusing on love. He creates a space for a philosophy that is liable to failure and that is experimental, pluralist, relativist, radically empirical, radically democratic, and absurd. Full color illustrations enhance this lyrical commitment to a new version (...) of pragmatism. (shrink)

This book encapsulates John Beebe’s influential work on the analytical psychology of consciousness. Building on C. G. Jung’s theory of psychological types and on subsequent clarifications by Marie-Louise von Franz and Isabel Briggs Myers, Beebe demonstrates the bond between the eight types of consciousness Jung named and the archetypal complexes that impart energy and purpose to our emotions, fantasies, and dreams. For this collection, Beebe has revised and updated his most influential and significant previously published papers and has introduced, (...) in a brand new chapter, a surprising theory of type and culture. Beebe’s model enables readers to take what they already know about psychological types and apply it to depth psychology. The insights contained in the fifteen chapters of this book will be especially valuable for Jungian psychotherapists, post-Jungian academics and scholars, psychological type practitioners, and type enthusiasts. (shrink)

A fascinating collection of essays by leading scholars in the field engage with the idea of religious pluralism mooted by John Hick to offer incisive insights on religious pluralism and related themes and to address practical aspects such as interreligious spirituality and worship in a multi-faith context.

John Henry gives a dramatic account of the background to Bacon's innovations and the sometimes unconventional sources for his ideas.

This collection of John Mackie's papers on topics in epistemology, some of which have not previously been published, deal with such issues as: incorrigible empirical statements; rationalism and empiricism; the philosophy of John Anderson; self-refutation; Plato's theory of idea; ideological explanation; problems of intentionality; Popper's third world;; mind, brain, and causation; Newcomb's Paradox and the direction of causation; induction; causation in concept, knowledge, and reality; absolutism; Locke and representative perception; and anti-realisms.

Charles S. Peirce, William James, Josiah Royce, George Santayana, John Dewey, and George Herbert Mead: each of these individuals is an original and historically important thinker; each is an essential contributor to the period, perspective, and tradition of classical American philosophy; and each speaks directly, imaginatively, critically, and wisely to our contemporary global society, its distant possibilities for improvement, and its massive, pressing problems. From the initiative of pragmatism in approximately 1870 to Dewey's final work after World War II, (...) classical American philosophy has come to represent the critical articulation of attitudes, outlooks, and forms of life imbedded in the culture from which it arose. John Stuhr brings together the works of these foremost thinkers to present a comprehensive collection in American philosophy. Extensive introductory essays, written especially for this volume by leading scholars of the subject, provide not only the bibliographical and cultural contexts necessary to a full appreciation of each thinker, but also original critical and interpretive philosophical observations. (shrink)

John Sellars presents a broad and lively introduction to Hellenistic philosophy. This was a rich period for philosophy, with the birth of Epicureanism and Stoicism, alongside the activities of Platonists, Aristotelians, and Cynics. Sellars offers accessible coverage of all areas from epistemology to ethics and politics.

In this lively book, John Macnamara shows how a number of important thinkers through the ages have approached problems of mental representation and the ...

_The Social Thought of Ortega y Gasset_ is the third and final volume of John T. Graham's massive investigation of the thought of Ortega, the renowned twentieth-century Spanish essayist and philosopher. This volume concludes the synthetic trilogy on Ortega's thought as a whole, after previous studies of his philosophy of life and his theory of history. As the last thing on which he labored, Ortega's social theory completed what he called a "system of life" in three dimensions—a unity in (...) the plurality of philosophy, history, and sociology as three fundamental disciplines that enter into and overlap each other and other humanities. In this volume, Graham investigates Ortega's social thought as expressed in his central work, _Man and People,_ and in several pragmatic fields, interpreting it all in terms of comprehensive categories of postmodernism and interdisciplinarity. While others have studied Ortega's social thought and recently his postmodernity, no one has done so in the context of his thought as a whole or by such a variety of methods. The "unity in plurality" of Ortega's system is evident in the broad and varied structure of his sociology, which he intended to serve for postmodern times. His own postmodernism was rooted in Nietzsche but also in the pragmatism—from James, Peirce, and Dewey—that informs all parts of this trilogy. Ortega was the first educator with an interdisciplinary theory and practice—another aspect of the "unity in plurality" of his system. He found inspiration in both ancient and modern precedents for what he saw as a postmodern method of investigating themes and problems that are common to all the human sciences. Innovations at his Institute of Humanities were early postmodern precedents for a new interdisciplinary social method for use by specialists in a variety of fields. All of those interested in Ortega can utilize such methods to elucidate his thought as a whole as well as to pursue their own collaborative work. Home Complete Catalog Order Information Search. (shrink)

The article discusses the varying conceptions of the faculty of ‘the understanding’ in 18th-century British philosophy and logic. Topics include the distinction between the understanding and the will, the traditional division of three acts of understanding and its critics, the naturalizing of human understanding, conceiving of the limits of human understanding, British innatism and the critique of empiricist conceptions of the understanding, and reconceiving the understanding and the elimination of scepticism. Authors discussed include Richard Price, James Harris, Zachary Mayne, Edward (...) Bentham, Isaac Watts, Dugald Stewart, John Norris—as well as Locke, Berkeley, Hume and Reid. (shrink)

John Barton is convinced that in many areas of ethical enquiry the Old Testament has much to teach us, and he argues his case in this new book, which developed out of lectures given both in Canada and in Oxford. During it he looks again at the Ten Commandments; the narrative about David and his children; the ethical issues of ecology, sexual morality and property; human morality as the express command of God; and the motivation for moral conduct. By (...) the end of the book it is clear that although the Old Testament comes to us from a remote, alien and apparently unsophisticated context, the powerful minds who worked on its books still have things to say which remain evocative and suggestive for our own moral enquiries. (shrink)

The Neoplatonist philosophers who flourished between the third and sixth centuries AD had a profound influence on western philosophy, on both Christian and Islamic literature and the visual arts from the Renaissance to modern times. This extensively revised and updated second edition of Neoplatonists provides a valuable introduction to the thought of four central Neoplatonic philosophers, Plotinus, Porphyry, Proclus and Iamblichus. John Gregory presents new translations of a selection of key passages from Neoplatonist writings, an introduction that puts in (...) context the writings, and an epilogue detailing the legacy and influence of Neoplatonist thought. (shrink)

John Corcoran and George Boger. Aristotelian logic and Euclidean geometry. Bulletin of Symbolic Logic. 20 (2014) 131. -/- By an Aristotelian logic we mean any system of direct and indirect deductions, chains of reasoning linking conclusions to premises—complete syllogisms, to use Aristotle’s phrase—1) intended to show that their conclusions follow logically from their respective premises and 2) resembling those in Aristotle’s Prior Analytics. Such systems presuppose existence of cases where it is not obvious that the conclusion follows from the (...) premises: there must be something deductions can show. Corcoran calls a proposition that follows from given premises a hidden consequence of those premises if it is not obvious that the proposition follows from those premises. By a Euclidean geometry we mean an extended discourse beginning with basic premises—axioms, postulates, definitions—1) treating a universe of geometrical figures and 2) resembling Euclid’s Elements. There were Euclidean geometries before Euclid (fl. 300 BCE), even before Aristotle (384–322 BCE). Bochenski, Lukasiewicz, Patzig and others never new this or if they did they found it inconvenient to mention. Euclid shows no awareness of Aristotle. It is obvious today—as it should have been obvious in Euclid’s time, if anyone knew both—that Aristotle’s logic was insufficient for Euclid’s geometry: few if any geometrical theorems can be deduced from Euclid’s premises by means of Aristotle’s deductions. Aristotle’s writings don’t say whether his logic is sufficient for Euclidean geometry. But, there is not even one fully-presented example. However, Aristotle’s writings do make clear that he endorsed the goal of a sufficient system. Nevertheless, incredible as this is today, many logicians after Aristotle claimed that Aristotelian logics are sufficient for Euclidean geometries. This paper reviews and analyses such claims by Mill, Boole, De Morgan, Russell, Poincaré, and others. It also examines early contrary statements by Hintikka, Mueller, Smith, and others. Special attention is given to the argumentations pro or con and especially to their logical, epistemic, and ontological presuppositions. What methodology is necessary or sufficient to show that a given logic is adequate or inadequate to serve as the underlying logi of a given science. (shrink)

John Macquarrie's classic study of existentialism and the work of two of its most important representatives: Martin Heidegger and Rudolf Bultmann.

JOHN CORCORAN AND WAGNER SANZ, Disbelief Logic Complements Belief Logic. Philosophy, University at Buffalo, Buffalo, NY 14260-4150 USA E-mail: [email protected] Filosofia, Universidade Federal de Goiás, Goiás, GO 74001-970 Brazil E-mail: [email protected] -/- Consider two doxastic states belief and disbelief. Belief is taking a proposition to be true and disbelief taking it to be false. Judging also dichotomizes: accepting a proposition results in belief and rejecting in disbelief. Stating follows suit: asserting a proposition conveys belief and denying conveys disbelief. Traditional (...) logic implicitly focused on logical relations and processes needed in expanding and organizing systems of beliefs. Deducing a conclusion from beliefs results in belief of the conclusion. Deduction presupposes consequence: one proposition is a consequence of a set of a propositions if the latter logically implies the former. The role of consequence depends on its being truth-preserving: every consequence of a set of truths is true. This paper, which builds on previous work by the second author, explores roles of logic in expanding and organizing systems of disbeliefs. Aducing a conclusion from disbeliefs results in disbelief of the conclusion. Aduction presupposes contrequence: one proposition is a contrequence of a set of propositions if the set of negations or contradictory opposites of the latter logically implies that of the former. The role of contrequence depends on its being falsity-preserving: every contrequence of a set of falsehoods is false. A system of aductions that includes, for every contrequence of a given set, an aduction of the contrequence from the set is said to be complete. Historical and philosophical discussion is illustrated and enriched by presenting complete systems of aductions constructed by the second author. One such, a natural aduction system for Aristotelian categorical propositions, is based on a natural deduction system attributed to Aristotle by the first author and others. ADDED NOTE: Wagner Sanz reconstructed Aristotle’s logic the way it would have been had Aristole focused on constructing “anti-sciences” instead of sciences: more generally, on systems of disbeliefs. (shrink)