Rose has shown in [2] that the following axioms are sufficient, with modus ponens, for m-valued Łukasiewiczian implication.

THE INDICATIVE CONDITIONAL. A PROBABILISTIC CRITERION OF SOUNDNESS FOR DEDUCTIVE INFERENCES Our objective in this section is to establish a prima facie case ...

In “Tracking, Competence, and Knowledge,” Ernest Sosa notes that in attempting to account for the conditions for knowledge, externalists have proposed that the justification condition be replaced or supplemented by the requirement that a certain modal relation be obtained between a fact and a subject's belief concerning that fact. While assessing attempts to identify such a relation, he focuses on an account labeled “Cartesian‐tracking”, which accounts for the relation in the form of two conditionals. If a person S believes (...) a proposition P → P P → S believes P. Sosa suggests that be abandoned as a requirement, and that, equipped with his modifications, can offer promising results in connection with skepticism. He argues that modified coupled with the requirement that S's belief be “virtuous” can illuminate the nature of propositional knowledge. (shrink)

This article is concerned with one of the notable but forgotten research strands that developed out of French nineteenth-century positivism, a strand that turned attention to the study of scientific discovery and was actively pursued by French epistemologists around the turn of the nineteenth century. I first sketch the context in which this research program emerged. I show that the program was a natural offshoot of French neopositivism; the latter was a current of twentieth-century thought that, even if implicitly, challenged (...) the positivism of first-generation positivists such as Comte. I then survey what French epistemologists—including Ernest Naville, Élie Rabier, Pierre Duhem, Édouard Le Roy, Abel Rey, André Lalande, Théodule-Armand Ribot, Edmond Goblot, and Jacques Picard, among others—had to say about the logic, psychology, and sociology of discovery. My story demonstrates the inaccuracy of existing historical accounts of the philosophical study of scientific discovery. (shrink)

Extends the ideas of social constructivism to the philosophy of mathematics, developing a powerful critique of traditional absolutist conceptions of mathematics, and proposing a reconceptualization of the philosophy of mathematics.

Introduction: Vulnerability is a poorly understood concept in research ethics, often aligned to autonomy and consent. A recent addition to the literature represents a taxonomy of vulnerability developed by Kipnis, but this refers to the conduct of clinical trials rather than qualitative research, which may raise different issues. Aim: To examine issues of vulnerability in cancer and palliative care research obtained through qualitative interviews. Method: Secondary analysis of qualitative data from 26 black Caribbean and 19 white British patients with advanced (...) cancer. Results: Four domains of vulnerability derived from Kipnis’s taxonomy were identified and included: (i) communicative vulnerability, represented by participants impaired in their ability to communicate because of distressing symptoms; (ii) institutional vulnerability, which referred to participants who existed under the authority of others—for example, in hospital; (iii) deferential vulnerability, which included participants who were subject to the informal authority or the independent interests of others; (iv) medical vulnerability, which referred to participants with distressing medical conditions; and (v) social vulnerability, which included participants considered to belong to an undervalued social group. Participants from both ethnic groups populated all these domains, but those who were black Caribbean were more present among the socially vulnerable. Conclusions: Current classifications of vulnerability require reinterpretation when applied to qualitative research at the end of life. We recommend that researchers and research ethics committees reconceptualise vulnerability using the domains identified in this study and consider the research context and interviewers’ skills. (shrink)

On 25th October 1946, in a crowded room in Cambridge, Ludwig Wittgenstein and Karl Popper came face to face for the first and only time. The meeting was a disaster, their loud and aggressive confrontation became the stuff of legend. This book tells what really went on in that room.

This book is less about disjunction than about the English word ‘or’, and it is less for than against formal logicians—more exactly, against those who maintain that formal logic can be applied in certain ways to the evaluation of reasoning formulated in ordinary English. Nevertheless, there are many things to interest such of those persons who are willing to overlook the frequent animadversions directed against their kind in the book, and this review will concentrate on them.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain (...) in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant. (shrink)

Dissent and Philosophy in the Middle Ages offers scholars of Dante's Divine Comedy an integral understanding of the political, philosophical, and religious context of the medieval masterwork. First penned in French by Ernest L. Fortin, one of America's foremost thinkers in the fields of philosophy and theology, Dissidence et philosophie au moyen-âge brings to light the complexity of Dante's thought and art, and its relation to the central themes of Western civilization. Available in English for the first time through (...) this superb translation by Marc A. LePain, Dissent and Philosophy will make a supremely important contribution to the discussion of Dante as poet, theologian, and philosopher. (shrink)

This volume presents a selection of the most influential recent discussions of the crucial metaphysical question: What is it for one event to cause another? The subject of causation bears on many topics, such as time, explanation, mental states, the laws of nature, and the philosophy of science. Contributors include J.L Mackie, Michael Scriven, Jaegwon Kim, G.E.M. Anscombe, G.H. von Wright, C.J. Ducasse, Wesley C. Salmon, David Lewis, Paul Horwich, Jonathan Bennett, Ernest Sosa, and Michael Tooley.

A published simulation model Riolo et al. 2001 ) was replicated in two independent implementations so that the results as well as the conceptual design align. This double replication allowed the original to be analysed and critiqued with confidence. In this case, the replication revealed some weaknesses in the original model, which otherwise might not have come to light. This shows that unreplicated simulation models and their results can not be trusted - as with other kinds of experiment, simulations need (...) to be independently replicated. (shrink)

Philosophy Bites brings together the twenty-five best interviews from this hugely successful website.

1.1 - Background - page 17 1.2 - The Style of Approach - page 18 1.3 - Motivation - page 19 1.4 - Style of Presentation - page 20 1.5 - Outline of the Thesis - page 21..

Creativity is one of the least understood aspects of intelligence and is often seen as intuitive' and not susceptible to rational enquiry. Recently, however, there has been a resurgence of interest in the area, principally in artificial intelligence and cognitive science, but also in psychology, philosophy, computer science, logic, mathematics, sociology, and architecture and design. This volume brings this work together and provides an overview of this rapidly developing field. It addresses a range of issues. Can computers be creative? Can (...) they help us to understand human creativity? How can artificial intelligence (AI) enhance human creativity? How, in particular, can it contribute to the sciences of the artificial', such as design? Does the new wave of AI (connectionism, geneticism and artificial life) offer more promise in these areas than classical, symbol-handling AI? What would the implications be for AI and cognitive science if computers could not be creative? These issues are explored in five interrelated parts, each of which is introducted and explained by a leading figure in the field. - Prologue (Margaret Boden) - Part I: Foundational Issues (Terry Dartnall) - Part II: Creativity and Cognition (Graeme S. Halford and Robert Levinson) - Part III: Creativity and Connectionism (Chris Thornton) - Part IV: Creativity and Design (John Gero) - Part V: Human Creativity Enhancement (Ernest Edmonds) - Epilogue (Douglas Hofstadter) For researchers in AI, cognitive science, computer science, philosophy, psychology, mathematics, logic, sociology, and architecture and design; and anyone interested in the rapidly growing field of artificial intelligence and creativity. (shrink)

Ernest Nagel, one of the world's leading philosophers of science, is an unreconstructed empirical rationalist who continues to believe that the logical methods of the modern natural sciences are the most successful instruments men have devised to acquire reliable knowledge. This book presents "Teleology Revisited"-the John Dewey lectures delivered at Columbia University- and eleven of Nagel's articles on the philosophy of science.

“It’s not good enough to say there’s some mechanism such that you start out with amoebas and you end up with us. Everybody agrees with that. The question is in this case in the mechanical details. What you need is an account, as it were step by step, about what the constraints are, what the environmental variables are, and Darwin doesn’t give you that.”.

Finding suitable analysis techniques for networks generated from social processes is a difficult task when the population changes over time. Traditional social network analysis measures may not work in such circumstances. It is argued that agent-based social networks should not be constrained by a priori assumptions about the evolved network and/or the analysis techniques. In most agent-based social simulation models, the number of agents remains fixed throughout the simulation; this paper considers the case when this does not hold. Thus the (...) aim of this paper is to demonstrate how the network signatures change when the agents’ population depends upon endogenous social processes. We argue for a much wider attention from the social simulation community in addressing this open research problem. (shrink)

When Ernest Gellner was his early thirties, he took it upon himself to challenge the prevailing philosophical orthodoxy of the day, Linguistic Philosophy. Finding a powerful ally in Bertrand Russell, who provided the foreword for this book, Gellner embarked on the project that was to put him on the intellectual map. The first determined attempt to state the premises and operational rules of the movement, Words and Things remains philosophy's most devastating attack on a conventional wisdom to this day.

In this paper I will argue that, in general, where the evidence supports two theories equally, the simpler theory is not more likely to be true and is not likely to be nearer the truth. In other words simplicity does not tell us anything about model bias. Our preference for simpler theories (apart from their obvious pragmatic advantages) can be explained by the facts that humans are known to elaborate unsuccessful theories rather than attempt a thorough revision and that a (...) fixed set of data can only justify adjusting a certain number of parameters to a limited degree of precision. No extra tendency towards simplicity in the natural world is necessary to explain our preference for simpler theories. Thus Occam's razor eliminates itself (when interpreted in this form). (shrink)

The paper investigates what is meant by "good science" and "bad science" and how these differ as between the natural (physical and biological) sciences on the one hand and social sciences on the other. We conclude on the basis of historical evidence that the natural science are much more heavily constrained by evidence and observation than by theory while the social sciences are constrained by prior theory and hardly at all by direct evidence. Current examples of the latter proposition are (...) taken from recent issues of leading social science journals. We argue that agent based social simulations can be used as a tool to constrain the development of a new social science by direct (what economists dismiss as anecdotal) evidence and that to do so would make social science relevant to the understanding and influencing of social processes. We argue that such a development is both possible and desirable. We do not argue that it is likely. (shrink)

These essays explore the relationship between culture and politics in the modern world. They range in space from Iran to Algeria, and the eastern marchlands of Europe to the Atlantic, and in time over the nineteenth and twentieth centuries. But they are all inspired by a cluster of linked preoccupations with the nature of the social order now emerging in the world and the kinds of moral and political legitimation it requires and permits. The essays are also linked by (...) class='Hi'>Ernest Gellner's distinctive, and highly arresting, intellectual temper and style. The volume will interest a wide range of readers in the social sciences and philosophy. (shrink)

The only RNA molecules known to be branched are circular structures with tails known as lariats that arise during nuclear pre‐mRNA splicing. Lariats accumulate within a large multicomponent particle called a spliceosome that forms upon the addition of unspliced mRNA to nuclear extracts. Recently an RNA molecule has been observed to catalyze branch formation. In this case a single intron of a yeast mitochondrial pre‐mRNA participates in a self‐splicing reaction that results in the accumulation of branched lariats that are processed (...) to correctly spliced exons.An enzyme highly specific for branch removal found in the same extracts that form branches during pre‐mRNA splicing can debranch RNA lariats to their linear forms without loss of nucleotides.The chemical synthesis of branched RNA has recently been achieved. High yields of sequence‐specific oligonucleotides are now available for the analysis of RNA splicing by techniques dependent on branch‐site recognition. (shrink)

A “mental” multiplication scheme is given for the super hypercomplex numbers, which extend the 16-element Dirac algebra to 32 elements by appending the complex octonions. This extends the 5-vectors of relativity to 9-vectors. The problems with nonassociativity, for the group structures and wave equation covariance, are explored.

To explain Strepsiades' initiation in Aristophanes' Clouds, recent scholars have referred to a thronosis ritual at the Eleusinian mysteries to describe the process wherein the initiate sits on a stool with head covered. The term thronosis, however, properly belongs to Korybantic initiation ritual, not to the Eleusinian Mysteries. Not only are the terms employed to describe the rituals different, but the iconographic representations of the ritual and the mythic paradigms are different as well. The purificatory silent sitting of the Eleusinian (...) initiate should not be confused with the bewildering and terrifying treatment of the enthroned initiate in a Korybantic initiation. (shrink)

It is argued that complexity is not attributable directly to systems or processes but rather to the descriptions of their `best' models, to reflect their difficulty. Thus it is relative to the modelling language and type of difficulty. This approach to complexity is situated in a model of modelling. Such an approach makes sense of a number of aspects of scientific modelling: complexity is not situated between order and disorder; noise can be explicated by approaches to excess modelling error; and (...) simplicity is not truth indicative but a useful heuristic when models are produced by a being with a tendency to elaborate in the face of error. (shrink)

Men make themselves radically different pictures of reality.The crucial word in this assertion is ‘radically’. Its full force is not often appreciated. But ‘picture’ also requires some elucidation. The term suggests, like the word ‘vision’, something relatively static. A ‘vision of reality’, a style of thought, a culture, is in fact an ongoing process, and one which contains internal options, alternatives, disagreements. There is no language in which one cannot both affirm and deny. Even, or perhaps especially, a culture which (...) maintains that the big issues have been finally settled within it, can yet conceive of the alternatives which are being denied and eliminated. It must give some reasons, however dogmatic, for selecting that which it does select and for excluding that which it excludes, and thus in a way it concedes that things could be otherwise. (shrink)

Plato and the Power of Images addresses ways Plato has used images and the ways to understand their status as images, particularly how an image resembles what it represents and how to avoid mistaking that image for what it represents.