For the first time, this book classifies how attention shifts, and argues that self-awareness, reflection, and even morality, are best thought of as dynamic...

Originally published in 1936, this book presents the ancient Greek text of the paraphrases and quotations of Zeno's philosophical arguments, together with a facing-page English translation and editorial commentary. Detailed notes are incorporated throughout and a bibliography is also included. This book will be of value to anyone with an interest in Zeno and ancient philosophy.

We analyse the extent of possible computations following Hogarth ([2004]) conducted in Malament–Hogarth (MH) spacetimes, and Etesi and Németi ([2002]) in the special subclass containing rotating Kerr black holes. Hogarth ([1994]) had shown that any arithmetic statement could be resolved in a suitable MH spacetime. Etesi and Németi ([2002]) had shown that some relations on natural numbers that are neither universal nor co-universal, can be decided in Kerr spacetimes, and had asked specifically as to the extent of computational limits there. (...) The purpose of this note is to address this question, and further show that MH spacetimes can compute far beyond the arithmetic: effectively Borel statements (so hyperarithmetic in second-order number theory, or the structure of analysis) can likewise be resolved: Theorem A. If H is any hyperarithmetic predicate on integers, then there is an MH spacetime in which any query ? n H ? can be computed. In one sense this is best possible, as there is an upper bound to computational ability in any spacetime, which is thus a universal constant of that spacetime. Theorem C. Assuming the (modest and standard) requirement that spacetime manifolds be paracompact and Hausdorff, for any spacetime there will be a countable ordinal upper bound, , on the complexity of questions in the Borel hierarchy computable in it. Introduction 1.1 History and preliminaries Hyperarithmetic Computations in MH Spacetimes 2.1 Generalising SADn regions 2.2 The complexity of questions decidable in Kerr spacetimes An Upper Bound on Computational Complexity for Each Spacetime CiteULike Connotea Del.icio.us What's this? (shrink)

As the United States is currently prosecuting two wars, it is important to consider whether those wars, and the resulting noncombatantcasualties, can be morally justified. Such consideration can be initiated by considering some of Alan Donagan’s work in his book The Theory of Morality. In that book Donagan sets out to develop, as a philosophical system, that part of the common morality according to the Hebrew-Christian tradition, which does not depend on any theistic beliefs. According to that tradition it is (...) sometimes morally permissible to resort to war. This poses a problem because also part of the tradition is a near absolute prohibition on harming innocent people. Since innocent people die in war, there is a tension here.Donagan claims that this problem can be solved by assigning the blame for some such deaths to the aggressor, thereby permitting (some) resorts to war. This paper shows that this solution is inadequate; and defends a more plausible (and more traditional) justification for some innocent deaths. This justification is consistent with the system Donagan develops, and thus may have application in the consideration of the justification of the two wars currently being prosecuted by the United States. (shrink)

It has been argued that the fundamental laws of physics are deceitful in that they give the impression of greater unity and coherence in our theories than is actually found to be the case. Causal stories and phenomenological relationships are claimed to provide a more acceptable account of the world, and only theoretical entities — not laws — are considered as perhaps corresponding to real features of the world.This paper examines these claims in the light of the author's own field (...) of research: high energy physics. Some of the distinctions upon which the above conclusions are based are found not to be tenable in practice. Examples from experimental particle physics are presented which suggest an important role of the underlying theoretical structure which cannot be overlooked. It is argued that the fundamental theories must, in fact, be treated as being as worthy or unworthy of ontological commitment as the entities they postulate or the phenomenological relationships they inspire. Whilst it is conceded that aspects of the current theoretical formalism belie literal interpretation, it is maintained that revision in these particular areas need not affect the symmetry principles, particle spectra, or coupling strengths that largely determine the empirical content of the theory. (shrink)

This paper examines Hume’s ‘Title Principle’ and its role in a response to one of the ‘manifest contradictions’ he identifies in the conclusion to Book I of A Treatise on Human Nature. This ‘contradiction’ is a tension between two ‘equally natural and necessary’ principles of the imagination, our causal inferences and our propensity to believe in the continued and distinct existence of objects. The problem is that the consistent application of causal reason undercuts any grounds with have for the belief (...) in continued and distinct existence, and yet that belief is as ‘natural and necessary’ as our propensity to infer effects from causes. The TP appears to offer a way to resolve this ‘contradiction’. It statesWhere reason is lively, and mixes itself with some propensity, it ought to be assented to. Where it does not, it never can have any title to operate upon us.’ In brief, if it can be shown that the causal inferences that undermine the belief in external world are not ‘lively’ nor mixed with some propensity’ then we have grounds for think that they have no normative authority. This is in part a response to another ‘manifest contradiction’, namely the apparently self-undermining nature of reason. In this paper I examine the nature and grounds of the TP and its relation to these ‘manifest contradictions’. (shrink)

Aron Gurwitsch claims that the field of consciousness is invariantly organized in a theme, thematic field, margin pattern. However, at least two perceptual presentations, chaos and boundlessness, are not ordered in accordance with this pattern. The question this study poses then is the following: given Gurwitsch's field-theory of experiential organization, what is the structure, status, and function of chaos and boundlessness in the field of consciousness? ;Using Gurwitsch's field-theory organization as a base, the structure of thematic chaos and then of (...) thematic boundlessness is articulated: the first by contrasting the field-theories of Gurwitsch and James, the second by contrasting Gurwitsch and Kant. It is concluded that in both cases no thematic Gestalt-coherence and no thematic field as relevant context is presented. ;In terms of status and function, chaos and boundlessness are interpreted as necessary limits. These "limit cases" are not "ideal limits" since they are possible perceptual presentations. Also, limit is taken to mean a two-edged presentation, one that is both an ending and a beginning. Interpreting Gurwitsch, we conclude that both cases are epistemological endings, since they represent a necessary end to the ordinary perception of things. Interpreting James, we conclude that it is possible that thematic chaos is also a metaphysical beginning in experience, since it is that experience in which reality is presented as underived and original. Interpreting Kant, we conclude that it is possible that boundlessness is also an ethical beginning in experience, since it is that experience in which the most original feeling of our sense of humanity is presented. ;We show that chaos and boundlessness each have their own unique field-organization, that they function as two-edged limits involving epistemological concerns on the one hand and metaphysical and ethical concerns respectively on the other, and that their structure and status as limits in the field of consciousness are not contingent but necessary. (shrink)