The Concept of Logical Consequence is a critical evaluation of the model-theoretic and proof-theoretic characterizations of logical consequence that proceeds from Alfred Tarski's characterization of the informal concept of logical consequence. This study evaluates and expands upon ideas set forth in Tarski's 1936 article on logical consequence, and appeals to his 1935 article on truth. Classical logic, as well as extensions and deviations are considered. Issues in the philosophy of logic such as the nature of logical constants, the philosophical significance of completeness, and the metaphysical and epistemological implications of logic are discussed in the context of the examination of the concept of logical consequence.

Newton's bucket, Einstein's elevator, SchrAdinger's cat a " these are some of the best-known examples of thought experiments in the natural sciences. But what function do these experiments perform? Are they really experiments at all? Can they help us gain a greater understanding of the natural world? How is it possible that we can learn new things just by thinking?

In this revised and updated new edition of his classic text The Laboratory of the Mind, James Robert Brown continues to defend apriorism in the physical world. This edition features two new chapters, one on a oecounter thought experimentsa and another on the development of inertial motion. With plenty of illustrations and updated coverage of the debate between Platonic rationalism and classic empiricism, this is a lively and engaging contribution to the field of philosophy of science.

""Thinking about Logic"" is an accessible and thought-provoking collection of classic articles in the philosophy of logic. An ideal companion to any formal logic course or textbook, this volume illuminates how logic relates to perennial philosophical issues about knowledge, meaning, rationality, and reality. The editors have selected each essay for its brevity, clarity, and impact and have included insightful introductions and discussion questions. The puzzles raised will help readers acquire a more thorough understanding of fundamental logic concepts and a firmer command of the connections between formal logic and other areas of philosophical study: epistemology, philosophy of language, philosophy of science, and metaphysics.

Timothy Smiley has made ground-breaking contributions to modal logic, free logic, multiple-conclusion logic, and plural logic. He has illuminated Aristotlea (TM)s syllogistic, the ideas of logical form and consequence, and the distinction between assertion and rejection, and has worked to debunk the theory of descriptions. This volume brings together new articles by an international roster of leading logicians and philosophers in order to honour Smileya (TM)s work. Their essays will be of significant interest to those working across the logical spectruma "in philosophy of language, philosophical and mathematical logic, and philosophy of mathematics.

This one-volume encyclopedia of logic introduces the central concepts of the field in a series of brief, non-technical, cross-referenced dictionary entries. The 352 alphabetically arranged entries give a clear, basic introduction to a very broad range of logical topics. Entries can be found on deductive systems, such as propositional logic, modal logic, deontic logic, temporal logic, set theory, many-valued logic, mereology, and paraconsistent logic. Similarly, there are entries on topics relating to those previously mentioned such as negation, conditionals, truth tables, and proofs. Historical periods and figures are also covered, including ancient logic, medieval logic, Buddhist logic, Aristotle, Ockham, Boole, Frege, Russell, Goedel, and Quine. There are even entries relating logic to other areas and topics, like biology, computers, ethics, gender, God, psychology, metaphysics, abstract entities, algorithms, the ad hominem fallacy, inductive logic, informal logic, the liar paradox, metalogic, philosophy of logic, and software for learning logic. In addition to the dictionary, there is a substantial chronology listing the main events in the history of logic, an introduction that sketches the central ideas of logic and how it has evolved into what it is today, and an extensive bibliography of related readings. This book is not only useful for specialists but also understandable to students and other beginners in the field.

First Published in 2004. Routledge is an imprint of Taylor & Francis, an informa company.

All of us are faced countless times with the challenge of persuading others, whether we're trying to win a trivial argument with a friend or convince our coworkers about an important decision. Instead of relying on untrained instinct--and often floundering or failing as a result--we'd win more arguments if we learned the timeless art of verbal persuasion, rhetoric. How to Win an Argument gathers the rhetorical wisdom of Cicero, ancient Rome's greatest orator, from across his works and combines it with passages from his legal and political speeches to show his powerful techniques in action. The result is an enlightening and entertaining practical introduction to the secrets of persuasive speaking and writing--including strategies that are just as effective in today's offices, schools, courts, and political debates as they were in the Roman forum. How to Win an Argument addresses proof based on rational argumentation, character, and emotion; the parts of a speech; the plain, middle, and grand styles; how to persuade no matter what audience or circumstances you face; and more. Cicero's words are presented in lively translations, with illuminating introductions; the book also features a brief biography of Cicero, a glossary, suggestions for further reading, and an appendix of the original Latin texts. Astonishingly relevant, this unique anthology of Cicero's rhetorical and oratorical wisdom will be enjoyed by anyone who ever needs to win arguments and influence people--in other words, all of us.

The first edition, published by Acumen in 2000, became a prescribed textbook on modal logic courses. The second edition has been fully revised in response to readers' suggestions, including two new chapters on conditional logic, which was not covered in the first edition. "Modal Logics and Philosophy" is a fully comprehensive introduction to modal logics and their application suitable for course use. Unlike most modal logic textbooks, which are both forbidding mathematically and short on philosophical discussion, "Modal Logics and Philosophy" places its emphasis firmly on showing how useful modal logic can be as a tool for formal philosophical analysis. In part 1 of the book, the reader is introduced to some standard systems of modal logic and encouraged through a series of exercises to become proficient in manipulating these logics. The emphasis is on possible world semantics for modal logics and the semantic emphasis is carried into the formal method, Jeffrey-style truth-trees. Standard truth-trees are extended in a simple and transparent way to take possible worlds into account. Part 2 systematically explores the applications of modal logic to philosophical issues such as truth, time, processes, knowledge and belief, obligation and permission.

The first edition, published by Acumen in 2000, became a prescribed textbook on modal logic courses. The second edition has been fully revised in response to readers' suggestions, including two new chapters on conditional logic, which was not covered in the first edition. "Modal Logics and Philosophy" is a fully comprehensive introduction to modal logics and their application suitable for course use. Unlike most modal logic textbooks, which are both forbidding mathematically and short on philosophical discussion, "Modal Logics and Philosophy" places its emphasis firmly on showing how useful modal logic can be as a tool for formal philosophical analysis. In part 1 of the book, the reader is introduced to some standard systems of modal logic and encouraged through a series of exercises to become proficient in manipulating these logics. The emphasis is on possible world semantics for modal logics and the semantic emphasis is carried into the formal method, Jeffrey-style truth-trees. Standard truth-trees are extended in a simple and transparent way to take possible worlds into account. Part 2 systematically explores the applications of modal logic to philosophical issues such as truth, time, processes, knowledge and belief, obligation and permission.

The classical conception of reason (or logos) has been repeatedly attacked in the modern era. Its enemies range from Descartes, who complains that logos is not sufficiently useful or precise, to Derrida who hopes to liberate Western thought from its bondage to "logocentrism." At least since the time of Nietzsche, Plato has been damned as the chief architect of the classical conception of logos. He is accused of overvaluing reason and thereby devaluing the other, more human aspects of life. As it was originally formulated in Nietzsche's The Birth of Tragedy, Plato has been taken to be the arch-enemy of tragedy, which for Nietzsche was the most life-affirming of all the art forms of Greek culture. Originally published in 1990, The Tragedy of Reason defends Plato against his accusers. Employing a mode of exposition which exhibits Plato's position, Roochnik presents the Platonic conception of logos in confrontation with texts by Homer, Hesiod, Heraclitus, Aristotle, Descartes, Porty, and Derrida. In clear language, unencumbered by technical terminology, Roochnik shows that Platonic conception of logos is keenly aware of the strength of its opponents. The result is a presentation of Plato as a "tragic philosopher" whose conception of logos is characterized by an affirmation of its own limits as well as its goodness.

The present volume has its origin in a meeting of philosophers, linguists and cognitive scientists that was held at Umea University, Sweden, September 24-26, 1993. The meeting was organized by the Department of Philosophy in co-opersation with the Department of Linguistics, and it was called UmLLI-93, the Umea Colloquium on Dynamic Approaches in Logic, Language and Information. The papers included here fall into three broad categories. In the first part of the book, Action, are collected papers that concern the formal theory of action, the logic of norms, and the theory of rational decision. The papers in the second part, Belief Change, concern the theory of belief dynamics in the tradition of Alchourron, Gardenfors and Makinson. The third part, Cognition, concerns abstract questions about knowledge and truth as well as more concrete questions about the usefulness and tractability of various graphic representations of information.

This informative book is a necessary companion for anyone seeking to uncover the secret of successful persuasion: to organize, construct, and communicate arguments. It is at once comprehensive and accessible, an authoritative guide to logical thinking and effective communication. First, the text defines the nature and uses of argument, explaining how to read argument carefully. Such analysis then requires the student to reconstruct arguments in his or her own words. Finally, the reader is taught how to create a critical, reasoned response, thus constructing his or her own argument. To increase its accessibility and expand its range of application, "Critical Inquiry" uses (in addition to textual examples) advertisements from print media as "texts" for applying its principles to subjects outside the traditional mode of academic presentation. Throughout, carefully selected reading questions and exercises pace the reader and ensure that the material is securely grasped and successfully applied.

This book presents an interpretation of Kant's Critique of Pure Reason as a priori psychologism. It groups Kant's philosophy together with those of the British empiricists-Locke, Berkeley, and Hume-in a single line of psychologistic succession and offers a clear explanation of how Kant's psychologism differs from psychology and idealism. The book reconciles Kant's philosophy with subsequent developments in science and mathematics, including post-Fregean mathematical logic, non-Euclidean geometry, and both relativity and quantum theory. It also relates Kant's psychologism to Wittgenstein's later conception of language. Finally, the author reveals the ways in which Kant's philosophy dovetails with contemporary scientific theorizing about the natural phenomenon of consciousness and its place in nature. This book will be of interest to Kant scholars and historians of philosophy working on the British empiricists.

The main purpose of this work is to provide an English translation of and commentary on a recently published Arabic text dealing with con ditional propositions and syllogisms. The text is that of A vicenna (Abu represents his views on the subject as they were held throughout his life.

At a time when the news cycle turns on a tweet, journalism gets confused with opinion, and facts are treated as negotiable information, applying critical thinking skills to your social media consumption is more important than ever. Guy P. Harrison, an upbeat advocate of scientific literacy and positive skepticism, demonstrates how critical thinking can enhance the benefits of social media while giving users the skills to guard against its dangers. Social media has more than two billion users and continues to grow. Its widespread appeal as a means of staying in touch with friends and keeping up with daily news masks some serious pitfalls-- misinformation, pseudoscience, fraud, propaganda, and irrational beliefs, for example, presented in an attractive, easy-to-share form. This book will teach you how to resist the psychological and behavioral manipulation of social media and avoid the mistakes that millions have already made and now regret. Harrison presents scientific studies that show why your subconscious mind loves social media and how that can work against your ability to critically evaluate information. Among other things, social media reinforces your biases, clouds your judgment with images that leave a false impression, and fills your brain with anecdotes that become cheap substitutes for objective data. The very nature of the technology keeps you in a bubble; by tracking your preferences it sends only filtered newsfeeds, so that you rarely see anything that might challenge your set notions. Harrison explores the implications of having digital "friends" and the effects on mood, self-esteem, and the cultivation of friendship in the real world. He discusses how social media affects attention spans and the ability to consider issues in depth. And he suggests ways to protect yourself against privacy invasion, cyberstalking, biased misinformation, catfishing, trolls, misuse of photos, and the confusion over fake news versus credible journalism.

Real Essentialism presents a comprehensive defence of neo-Aristotelian essentialism. Do objects have essences? Must they be the kinds of things they are in spite of the changes they undergo? Can we know what things are really like can we define and classify reality? Many if not most philosophers doubt this, influenced by centuries of empiricism, and by the anti-essentialism of Wittgenstein, Quine, Popper, and other thinkers. Real Essentialism reinvigorates the tradition of realist, essentialist metaphysics, defending the reality and knowability of essence, the possibility of objective, immutable definition, and its relevance to contemporary scientific and metaphysical issues such as whether essence transcends physics and chemistry, the essence of life, the nature of biological species, and the nature of the person.

This book is a study in the methodology of philosophical inquiry. Accordingly, it is a venture in metaphilosophy, perhaps the most controversial of philosophical disciplines.

Philosophy is caught in a dilemma. On one hand, its omission as a legitimate venture in empirical inquiry requires its looking to "the big picture" and striving to counteract the fragmented specialization of other cognitive domains. On the other hand, philosophy does not and cannot avert division of labor. Thus, it remains committed to the quest for unity and coherence in our understanding of the nature of things in a world where our knowledge is exploding in scope and in complexity. "

Philosophical Reasoning" explores this difficult situation and clarifies its implications by expounding and defending the following thesis: that systematization is the proper instrument of philosophical inquiry, and that the effective pursuit of philosophy's mission calls for constructing a doctrinal system that answers our questions in a coherent and comprehensive manner.

Naturalism, Reference, and Ontology is a collection of twelve original essays honoring Roger F. Gibson, who has been a leading proponent and defender of W. V. Quine's philosophy for nearly thirty years. The essays address a wide range of topics, including normativity and naturalized epistemology, holism, consciousness, the philosophy of logic, perception, value theory, and the arts. The contributors are an international group of prominent philosophers as well as rising scholars including: Robert Barrett, Lars Bergstrom, Richard Creath, David Henderson, Terence Horgan, Ernest Lepore, Pete Mandik, Alex Orenstein, Kenneth Shockley, J. Robert Thompson, Josefa Toribio, Joseph Ullian, Josh Weisberg, and Chase B. Wrenn.

The topic of vagueness re-emerged in the twentieth century from relative obscurity. It deals with the phenomenon in natural language that manifests itself in apparent semantic indeterminacy - the indeterminacy, for example, that arises when asked to draw the line between the tall and non-tall, or the drunk and the sober. An associated paradox emphasises the challenging nature of the phenomenon, presenting one of the most resilient paradoxes of logic. The apparent threat posed for orthodox theories of the semantics and logic of natural language has become the focus of intense philosophical scrutiny amongst philosophers and non-philosophers alike. Vagueness, Logic and Ontology explores various responses to the philosophical problems generated by vagueness and its associated paradox - the sorites paradox. Hyde argues that the theoretical space in which vagueness is sometimes ontologically grounded and modelled by a truth-functional logic affords a coherent response to the problems posed by vagueness. Showing how the concept of vagueness can be applied to the world, Hyde's ontological account proposes a substantial revision of orthodox semantics, metaphysics and logic. This book will be of particular interest to readers in philosophy, linguistics, cognitive science and geographic information systems.

First published in 1998, Loughlin examines the conception of rationality through the gazes of science, philosophy and political philosophy to further explain the concept of rational reasoning, the effects it has on the development on natural and social science and its implications on how we think about morals and politics.

This volume presents the best scholarship from the 19th National Communication Association/American Forensic Association Conference on Argumentation, which took place July 30-August 2, 2015, at Cliff Lodge, Snowbird Resort, in Alta, Utah. The Alta Conference, first held in 1979, is the oldest conference in argumentation studies in the world and biennially brings together a lively group of scholars, representing a variety of countries, with diverse perspectives on the theory and practice of argument. The essays in Recovering Argument invite reflection upon and reconsideration of argumentation's legacy, present status, and potential roles in social, cultural, and political life. Readers will encounter essays that treat the relationship between argumentation and memory, historical approaches to argumentation, the vitality of public and interpersonal argument, argument's role in leadership, discursive and presentational forms of argument, and the challenges of difference. Readers also will find these topics addressed from a variety of historical, social-scientific, and critical-interpretive perspectives.

This is the first complete English translation of On the Purity of the Art of Logic, a handbook of logic written in Latin by English philosopher Walter Burley (c. 1275-1344/5). The work circulated in the Middle Ages in two versions, a shorter and a longer one, both translated here by Paul Vincent Spade. The translations arc based on the only complete edition of Burley's treatises, corrected by Spade on the basis of one of the surviving manuscripts. The book also includes an extensive introduction, explanatory notes, a table of corresponding passages between the two versions, a select annotated bibliography, and three indexes.

A contemporary of John Duns Scotus and William of Ockham, Burley was active at the universities of both Paris and Oxford. He became one of the most important figures in the transformation of medieval logic and semantics that took place in the early fourteenth century. Burley used new tools and techniques of logical and semantical analysis, yet in many cases he used them in defense of traditional views, such as a realist metaphysical theory of "universals". On the Purity of the Art of Logic shows both these sides of Burley -- the innovator and the conservative -- as well as some of the ways in which his views corresponded or clashed with those of William of Ockham.

Biologists, climate scientists, and economists all rely on models to move their work forward. In this book, Stephen M. Downes explores the use of models in these and other fields to introduce readers to the various philosophical issues that arise in scientific modeling. Readers learn that paying attention to models plays a crucial role in appraising scientific work. This book first presents a wide range of models from a number of different scientific disciplines. After assembling some illustrative examples, Downes demonstrates how models shed light on many perennial issues in philosophy of science and in philosophy in general. Reviewing the range of views on how models represent their targets introduces readers to the key issues in debates on representation, not only in science but in the arts as well. Also, standard epistemological questions are cast in new and interesting ways when readers confront the question, "What makes for a good (or bad) model?" All examples from the sciences and positions in the philosophy of science are presented in an accessible manner. The book is suitable for undergraduates with minimal experience in philosophy and an introductory undergraduate experience in science. Key features: The book serves as a highly accessible philosophical introduction to models and modeling in the sciences, presenting all philosophical and scientific issues in a nontechnical manner. Students and other readers learn to practice philosophy of science by starting with clear examples taken directly from the sciences. While not comprehensive, this book introduces the reader to a wide range of views on key issues in the philosophy of science.

First published in 1998, this volume has its origin in a meeting that was held in Santiago de Compostela University, Santiago de Compostela (Spain) in January 1996. The meeting was organized by the Department of Logic and Philosophy of Science in cooperation with the Association for Logic, Methodology and Philosophy of Science in Spain. Within analytical philosophy issues such as the definability of truth, its semantic relevance, its role in the distinction between formal and natural languages, the status of truth-bearers or in its case of truth-makers, have become a crossroads in the studies of logic, philosophy of science, philosophy of language, philosophy of mind, epistemology and ontology. Thus, in spite of what the title Truth in Perspective may suggest to the reader at first, the present volume is not only - though it is also a presentation of different theories or conceptions of truth. Most of the book presents a vision of different groups of philosophical questions in which the issue of truth appears embedded together with other related themes, from different points of view.

By 2007, the situation in Afghanistan had reached a breaking point. Afghans were becoming increasingly disillusioned with a state-building process that had failed to deliver the peace dividend that they were promised. For many Afghans, the most noticeable change in their lives since the fall of the Taliban has been an acute deterioration in security conditions. Whether it is predatory warlords, the Taliban-led insurgency, the burgeoning narcotics trade, or general criminality, the threats to the security and stability of Afghanistan are manifold. The response to those threats, both in terms of the international military intervention and the donor-supported process to rebuild the security architecture of the Afghan state, known as security sector reform (SSR), have been largely insufficient to address the task at hand. NATO has struggled to find the troops and equipment it requires to complete its Afghan mission and the SSR process, from its outset, has been severely under-resourced and poorly directed. Compounding these problems, rampant corruption and factionalism in the Afghan government, particularly in the security institutions, have served as a major impediment to reform and a driver of insecurity.

This paper charts the evolution of the security environment in Afghanistan since the fall of the Taliban, deconstructing both the causes of insecurity and the responses to them. Through this analysis, it offers some suggestions on how to overcome Afghanistan's growing security crisis.