We examine the closure conditions of the probabilistic consequence relation of Hawthorne and Makinson, specifically the outstanding question of completeness in terms of Horn rules, of their proposed (finite) set of rules O. We show that on the contrary no such finite set of Horn rules exists, though we are able to specify an infinite set which is complete.

During the first half of the present century a number of outstanding philosophers realized that language theory could profitably be viewed as far more than merely a means of studying one among the many human faculties, or merely sharpening the tool we use to philosophize - they realized that there is a sense in which philosophy of language comprises (almost) the whole of philosophy. This was the famous linguistic turn: philosophers came to accept that everything that is is in a (...) sense through language, and that to study what there is is to study what our words mean.1 The enigma of the language-world relationship was brought to the centre of philosophical discussion early in this century by Frege, Russell, Wittgenstein, Austin and others. Their original point was that we cannot take the representing capacities of language at face value, that in order to treat of things - which cannot be done save with the help of words - we must first treat of words and make sure which of them are really capable of treating of things. Thus the philosophers undergoing the linguistic turn slowly gave up asking what is consciousness (matter, evil etc.)? in favour of asking what is the meaning of 'consciousness' ('matter', 'evil' etc.)? This simple turn seemed to have tremendous consequences for philosophy. By replacing the question what is consciousness? by the question what is the meaning of 'consciousness'? we seem to lose nothing (any meaningful answer to the former question seems to be recoverable from an answer to the latter), and yet it seems to take us from the weird realms of mind to the commonplace domain of language, from the troublesome immersing into people's heads to straightforward observing how they use words. It also seems to guard against the "bewitchment of our reason by language" (Wittgenstein) caused by words which are only seemingly meaningful: such questions as what does the word 'ether' stand for? can be answered simply by nothing, whereas the question what is ether? presupposes that there is something as ether (as.... (shrink)

An essay in the "new" metaphysics which has been emerging from English analytic philosophy. Acknowledging his debt to Wittgenstein, Shwayder concedes that what he has to offer "is nothing but philosophical theory in pretty much the old-fashioned sense." The three foci are referring, properties, and natural numbers. The multifarious and subtle distinctions are the source both of the book's strength and weakness. The concern and care for detailed shades of meaning frequently gets in the way of a more general metaphysical (...) view of the problems treated. --R. J. B. (shrink)

In this article we show that it is possible to completely classify the degrees of r.e. bases of r.e. vector spaces in terms of weak truth table degrees. The ideas extend to classify the degrees of complements and splittings. Several ramifications of the classification are discussed, together with an analysis of the structure of the degrees of pairs of r.e. summands of r.e. spaces.

Despite All Critique (2014) -- World Politics and Western Reason (1980) -- The Doubled Outsides of the Modern International (2005) -- The Subject of Security (1995) -- The Protection of Nature and the Nature of Protection (2005) -- Social Movements/World Politics (1994) -- Europe is Not Where It is Supposed to Be (2000) -- They Seek it Here, They Seek it There : Looking for Politics in Clayoquot Sound (2003) -- Violence, Modernity, Silence : From Weber to International Relations (1993) (...) -- Hobbes, Origins, Limits (2011) -- War, Terror, Judgement (2002) -- International, Imperial, Exceptional (2005) -- Which Democracy for Which Demos? (2013) -- The Political Theory of Boundaries and the Boundaries of Political Theory : Interview With Raia Prokhovnik (2012). (shrink)

The progression of research and scholarly inquiry does not occur in isolation and is wholly dependent on accurate reporting of methods and results, and successful replication of prior work. Without mechanisms to correct the literature, much time and money is wasted on research based on a crumbling foundation. These guidelines serve to outline the respective responsibilities of researchers, institutions, agencies, and publishers or editors in maintaining the integrity of the research record. Delineating these complementary roles and proposing solutions for common (...) barriers provide a foundation for best practices. (shrink)

Three experiments investigated the relationship between subjective experience and attentional lapses during sustained attention. These experiments employed two measures of subjective experience to examine how differences in awareness correspond to variations in both task performance and psycho-physiological measures . This series of experiments examine these phenomena during the Sustained Attention to Response Task . The results suggest we can dissociate between two components of subjective experience during sustained attention: task unrelated thought which corresponds to an absent minded disengagement from the (...) task and a pre-occupation with one's task performance that seems to be best conceptualised as a strategic attempt to deploy attentional resources in response to a perception of environmental demands which exceed ones ability to perform the task. The implications of these findings for our understanding of how awareness is maintained on task relevant material during periods of sustained attention are discussed. (shrink)

A provocative contribution to the new approach to the history and philosophy of science which emphasizes the role of radically new paradigms in scientific revolutions. While normal science proceeds as puzzle-solving within a relatively fixed paradigm, scientific crises lead to new paradigms where data, scientific problems, procedures, and standards for solutions are all altered. Scientific revolutions do not simply modify our understanding of a world which exists independently--they change the data and the world in which the scientist works. The essay (...) is filled with fascinating historical interpretations, though the analysis of the concept of a paradigm and scientific revolution is more suggestive than rigorous.--R. J. B. (shrink)

First published in 1975 by Leeds Books Ltd., this second, revised edition adds only a short, twelve page Postscript and an Index. The former replies to reviews of the original edition by clarifying the use of two key terms, by commenting on its principal weaknesses, and by indicating the direction of further work required by the position advocated.

A provocative collection of technical and popular essays dealing with a variety of scientific and political topics which Popper has treated in his major works. For the most part Popper develops, sharpens, and extends to new areas, themes which he has already explored. The major theme running through the essays is that knowledge grows by unjustified and unjustifiable anticipations, guesses and conjectures. These are controlled by criticisms and refutations. Theories can never be positively justified; they can only prove to be (...) resistant to rational criticism. The boldness of Popper's conjectures demands attempted refutations on the part of the reader.--R. J. B. (shrink)

A provocative collection of technical and popular essays dealing with a variety of scientific and political topics which Popper has treated in his major works. For the most part Popper develops, sharpens, and extends to new areas, themes which he has already explored. The major theme running through the essays is that knowledge grows by unjustified and unjustifiable anticipations, guesses and conjectures. These are controlled by criticisms and refutations. Theories can never be positively justified; they can only prove to be (...) resistant to rational criticism. The boldness of Popper's conjectures demands attempted refutations on the part of the reader.--R. J. B. (shrink)

During the past decade some of the most provocative and controversial disputes concerning the philosophy and history of science have centered about the work of Thomas Kuhn and Sir Karl Popper. One, therefore, looks with anticipation to this volume which is based on a symposium held in July, 1965 where Kuhn, Popper and several of Popper's former students met for an intellectual confrontation. But the result is depressing. The volume is an editorial mess. Two of the main scheduled speakers never (...) appeared at the symposium, although papers by them are published here. Some of the remarks published here seem to be those spoken on the day the symposium was held while others, like Kuhn's answer to his critics, were written four years after the symposium. The result is a confusing and distracting editorial unevenness. While Kuhn's fair-minded opening paper raises some of the most important issues to be confronted, one quickly senses that the Popperians are not really very much interested in discussing Kuhn's work but rather in pushing their own pet theses. Kuhn puts this rather generously when he labels it an example of "talking-through-each-other." Most of the Popperians seem to be obsessed with Kuhn's understanding of normal science and neglect the much more interesting questions concerning his views on scientific revolutions, the sense in which science does and does not make progress, the criteria involved in adjudicating among competing theories. It is almost with relief that one reads Margaret Masterman's remark that it is a "crashingly obvious fact" that there is normal science. Ironically, Masterman's article which is basically sympathetic to Kuhn's work is the most illuminating and the most critical. More successfully than any of other contributors she shows the ambiguities involved in Kuhn's idea of a paradigm. One's wishes that the Popperians would take a good hard look at themselves and what they are doing as it is so disastrously illustrated here. Although ostensibly dedicated to serious critical rationalism, they seem more eager to score points than to understand what they are criticizing. Although they supposedly abhor clubiness, they are rapidly forming themselves into a scholastic circle where the object seems to be to show how brilliant or how stupid some other student of Popper is. Although they scorn the quest for origins, they are almost compulsive in attempting to show that anything worthwhile was previously said by Sir Karl. This book illustrates the faults of the Popperians at their worst and few of their virtues. There is much heat and wit, but little light.--R. J. B. (shrink)

Despite the enormous and growing interest in Marx and the availability of Marx's writing in paperback, it is scandalous how little care has been taken in producing careful texts and English translations of Marx's work. O'Malley's edition is an outstanding exception. It is carefully and intelligently edited. The result makes available an extremely interesting text of Marx. A number of scholars have already argued that in this early critique, one can discover some of the earliest formulations of distinctive Marxian themes. (...) Now the reader can judge for himself, for this is the first full English translation of Marx's Critique. But this Critique is not only extremely important for understanding Marx's intellectual development, it also helps to make Hegel's Philosophy of Right come alive. Marx's fundamental ambivalence toward Hegel is evidenced here. It is clear that Marx is still very much under Hegel's influence and we can see how deeply Hegel is shaping Marx's thought, but there is also a toughness and incisiveness in Marx's criticism of Hegel. O'Malley has provided a very extensive introduction which not only provides the necessary background for understanding this text but also explores the role of this work in the totality of Marx's development. Altogether this edition shows a care and judiciousness which is exceptional. It eminently serves the purpose of making an important text accessible.--R. J. B. (shrink)

In this paper, we re-examine a series of gedanken welcher Weg (WW) experiments introduced by Scully, Englert and Walther that contain the essential ideas underlying the quantum eraser. For this purpose we use the Bohm model which gives a sharp picture of the behaviour of the atoms involved in these experiments. This model supports the thesis that interference disappears in such WW experiments, even though the centre of mass wave function remains coherent throughout the experiment. It also shows exactly what (...) it means to say ‘that the interference can be restored by manipulating the WW detectors long after the atoms have passed’. It does not support Wheeler’s notion that ‘the past is undefined and undefinable without the observation (in the present)’. (shrink)

A new translation which is eminently readable and extremely accurate. Much of the awkwardness and unnecessary obscurity of the Ogden translation has been eliminated. The comprehensive index which combines both English and German expressions is designed to meet the special problems involved in understanding the Tractatus. Unfortunately Russell's introduction to the 1922 edition is reproduced without any indication of the controversy concerning Russell's interpretation, or subsequent interpretations of the Tractatus.--R. J. B.

In this paper we show how the dynamics of the Schrödinger, Pauli and Dirac particles can be described in a hierarchy of Clifford algebras, \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}${\mathcal{C}}_{1,3}, {\mathcal{C}}_{3,0}$\end{document}, and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}${\mathcal{C}}_{0,1}$\end{document}. Information normally carried by the wave function is encoded in elements of a minimal left ideal, so that all the physical information appears within the algebra itself. The state of the quantum process can be (...) completely characterised by algebraic invariants of the first and second kind. The latter enables us to show that the Bohm energy and momentum emerge from the energy-momentum tensor of standard quantum field theory. Our approach provides a new mathematical setting for quantum mechanics that enables us to obtain a complete relativistic version of the Bohm model for the Dirac particle, deriving expressions for the Bohm energy-momentum, the quantum potential and the relativistic time evolution of its spin for the first time. (shrink)