Purely parallel neural networks can model object recognition in brief displays – the same conditions under which illusory conjunctions have been demonstrated empirically. Correcting errors of illusory conjunction is the “tag-assignment” problem for a purely parallel processor: the problem of assigning a spatial tag to nonspatial features, feature combinations, and objects. This problem must be solved to model human object recognition over a longer time scale. Our model simulates both the parallel processes that may underlie illusory conjunctions and the serial (...) processes that may solve the tag-assignment problem in normal perception. One component of the model extracts pooled features and another provides attentional tags that correct illusory conjunctions. Our approach addresses two questions: How can objects be identified from simultaneously attended features in a parallel, distributed representation? How can the spatial selectional requirements of such an attentional process be met by a separation of pathways for spatial and nonspatial processing? Our analysis of these questions yields a neurally plausible simulation of tag assignment based on synchronizing feature processing activity in a spatial focus of attention. (shrink)

Kant once wrote, “Many historians of philosophy... let the philosophers speak mere nonsense.... They cannot see beyond what the philosophers actually said to what they really meant to say.’ Rae Langton begins her book with this quotation. She concludes it, after a final pithy summary of the position that she attributes to Kant, with the comment, “That, it seems to me, is what Kant said, and meant to say”. In between are some two hundred pages of admirably clear, tightly argued (...) exegesis, supplemented by detailed references, in which she offers what the dust jacket blurb fairly describes as “a new interpretation and defence of Kant’s doctrine of things in themselves.” This is an extremely engaging and thought-provoking book. I am pleased to recommend it. (shrink)

I begin with Kant's notion of a maxim and consider the role which this notion plays in Kant's formulations of the fundamental categorical imperative. This raises the question of what a maxim is, and why there is not the same requirement for resolutions of other kinds to be universalizable. Drawing on Bernard Williams' notion of a thick ethical concept, I proffer an answer to this question which is intended neither in a spirit of simple exegesis nor as a straightforward exercise (...) in moral philosophy but as something that is poised somewhere between the two. My aim is to provide a kind of rational reconstruction of Kant. In the final section of the essay, I argue that this reconstruction, while it manages to salvage something distinctively Kantian, also does justice to the relativism involved in what J. L. Mackie calls 'people's adherence to and participation in different ways of life'. (shrink)

This third edition of The Infinite includes a new part 'Infinity Superseded' which contains two new chapters refining Moore's ideas through a re-examination of the ideas of Spinoza, Hegel, and Nietzsche. Much of this is heavily influenced by the work of Deleuze. There is also a new technical appendix on still unresolved issues about different infinite sizes.

This essay involves exploration of certain repercussions of Bernard Williams’ view that there is, in Wittgenstein’s later work, a transcendental idealism akin to that found in the Tractatus—sharing with it the feature that it cannot be satisfactorily stated. It is argued that, if Williams is right, then Wittgenstein’s later work precludes a philosophically substantial theory of meaning; for such a theory would force us to try to state the idealism. In a postscript written for the reprint of the essay, reasons (...) are given for thinking that Williams is not right: Wittgenstein’s later work actually helps us to repudiate as ill-conceived all those questions whose answers invite us to embrace any such idealism. But the main thesis of the essay remains intact. Indeed the idea that Wittgenstein’s later work precludes a philosophically substantial theory of meaning is reinforced. (shrink)

I am enormously grateful to everyone who has contributed to this double issue of Philosophical Topics, to Manuel Dries and Joseph Schear for conceiving the issue and initiating the process of inviting contributions, and to Ed Minar and Jack Lyons, former editor and current editor of the journal respectively, for their excellent work in bringing the issue into existence. Each contribution displays a level of engagement with my book1 that would have been gratifying even if the contribution had been confined (...) exclusively to the chapter that is its immediate focus. What I have found most gratifying, however, is the sensitivity that the contributors have shown to the broader project of the book and to the various connections and patterns that I try to trace across chapters. I thank them warmly for this.In the preface to my book I comment on the fact that I am a philosophical generalist, and I go on to apologize to “all those whose expertise I may have propagated without acknowledgement, or mangled, or worst of all ignored” (MST, xix). That certainly includes the present contributors. I take this opportunity to repeat the apology to them, an apology whose need I feel all the more keenly having read their contributions. (shrink)

It is argued that the use/mention distinction, if it is to be a clear-cut one, cannot have the significance that it is usually thought to have. For that significance attaches to the distinction between employing an expression in order to draw attention to, or to talk about, some aspect of the world, as determined by the expression’s meaning, and employing it in order to draw attention to, or to talk about, the expression itself—and this distinction is not a clear-cut one. (...) In the final section of the essay this argument is extended to cast doubt on a rather glib appeal to the use/mention distinction that is frequently made in the philosophy of language. (shrink)

This essay is concerned with Bernard Williams’ contention in Ethics and the Limits of Philosophy that, in ethics, reflection can destroy knowledge. I attempt to defend this contention from the charge of incoherence. I do this by taking seriously the idea that ethical knowledge is knowledge from an ethical point of view. There nevertheless remains an issue about whether the contention is consistent with ideas elsewhere in Williams’ own work, in particular with what he says about knowledge in Descartes. In (...) an earlier essay I argued that it is not. In a subsequent essay I indicated that I had changed my mind and gave a more sympathetic account of Williams’ contention. In this essay I set out the issues and say some more about my change of mind. (shrink)

It is argued that, although there are no ineffable truths, the concept of ineffability nevertheless does have application—to certain states of knowledge. Towards the end of the essay this idea is related to religion: it is argued that the language that results from attempting (unsuccessfully) to put ineffable knowledge into words is very often of a religious kind. An example of this is given at the very end of the essay. This example concerns the Euthyphro question: whether what is right (...) is right because God wills it, or whether God wills it because it is right. (shrink)

This chapter contains section titled: Introduction1 Was the Early Wittgenstein a Transcendental Idealist? Was the Later Wittgenstein a Transcendental Idealist?

The philosophy of mathematics was of colossal importance to Wittgenstein. Its problems had a peculiarly strong hold on him; and he seems to have thought that it was in addressing these problems that he produced his greatest work. However robust the distinction between the calculus and the surrounding prose, the prose may infect the calculus; or the prose may infect how we couch the calculus. Yet Wittgenstein's writings in the philosophy of mathematics stand in a curious relation to this self‐assessment. (...) By 1938, he had written an early version of his master‐work Philosophical Investigations, the second half of which was on the philosophy of mathematics. This material did not survive into the version of Philosophical Investigations that was eventually published after his death. Instead it appeared, modified in various ways, along with notes that he wrote during World War II, as Remarks on the Foundations of Mathematics, another posthumous publication, assembled by his literary executors. (shrink)

This essay is concerned with six linguistic moves that we commonly make, each of which is considered in turn. These are: stating rules of representation; representing things categorically; mentioning expressions; saying truly or falsely how things are; saying vaguely how things are; and stating rules of rules of representation. A common-sense view is defended of what is involved in our doing each of these six things against a much more sceptical view emanating from the idea that linguistic behavior is fundamentally (...) messy. Both the fifth move and the sixth move involve vague concepts, and much of the essay is concerned with developing an approach to various problems and puzzles that attach to such concepts, most notably the sorites paradoxes. (shrink)

This is an updated version of an essay originally written for a special issue of Philosophical Topics on the links between Kant and analytic philosophy. It explores these links by focusing on: Wittgenstein’s Tractatus; the logical positivism endorsed by Ayer; and the (very different) variation on that theme endorsed by Quine. The claim defended is that in all three cases we see analytic philosophers trying to attain and express a general philosophical understanding of why the bounds of sense should be (...) drawn where they should—but thereby confronting the aporia, which Kant too confronted, that it is impossible to do this without transgressing those very bounds. The paper closes by suggesting that the problem is in trying to attain and express such an understanding; in other words, that such an understanding is attainable, but not expressible. (shrink)

This essay is concerned with solipsism, understood as the extreme sceptical view that I have no knowledge except of my subjective state. A less rough formulation of the view is mooted, inspired by a Quinean combination of naturalism and empiricism. An objection to the resultant position is then considered, based on Putnam’s argument that we are not brains in vats. This objection is first outlined, then pitted against a series of counter-objections. Eventually it is endorsed, but only at the price (...) of exposing the formulation of solipsism in question as not, after all, a satisfactory formulation. This leads to further speculation about the status of solipsism itself. Two of the possibilities that are considered are, firstly, that it is incoherent and, secondly, that it is inexpressible. (shrink)

This essay appeared as a contribution to a special issue of European Journal of Philosophy to mark the fiftieth anniversary of the publication of P. F. Strawson’s The Bounds of Sense. In that book Strawson asks whether we should agree with Kant's claim, in his Critique of Pure Reason, that there can be only one world. What Kant means by this claim is that the four-dimensional realm that we inhabit must constitute the whole of empirical reality. Strawson gives reasons for (...) challenging this claim. This essay raises the question whether, even if Strawson is right, we may nevertheless have reason to believe that there can be only one world on a broader understanding of ‘world’. The aim is as much to clarify the issue as to settle it, although an attempt is made to motivate the view that there can indeed be only one world on this broader understanding. (shrink)

Kant once wrote, “Many historians of philosophy... let the philosophers speak mere nonsense.... They cannot see beyond what the philosophers actually said to what they really meant to say.’ Rae Langton begins her book with this quotation. She concludes it, after a final pithy summary of the position that she attributes to Kant, with the comment, “That, it seems to me, is what Kant said, and meant to say”. In between are some two hundred pages of admirably clear, tightly argued (...) exegesis, supplemented by detailed references, in which she offers what the dust jacket blurb fairly describes as “a new interpretation and defence of Kant’s doctrine of things in themselves.” This is an extremely engaging and thought-provoking book. I am pleased to recommend it. (shrink)

Two of Quine's most familiar doctrines are: that there is a distinction between underdetermination and indeterminacy; and that there is no distinction between analytic and synthetic truths. An argument is given that these two doctrines are incompatible. In terms wholly acceptable to Quine and based on the underdetermination/indeterminacy distinction, an exhaustive and exclusive distinction is drawn between two kinds of true sentences, which, it is argued, corresponds to the traditional analytic/synthetic distinction. An appendix is used to develop one aspect of (...) the underdetermination/indeterminacy distinction, as construed here, and to discuss, in passing, some of Quine’s more general views on truth. (shrink)

This essay is concerned with Graham Bird’s treatment, in The Revolutionary Kant, of Kant’s mathematical antinomies. On Bird’s interpretation, our error in these antinomies is to think that we can settle certain issues about the limits of physical reality by pure reason whereas in fact we cannot settle them at all. On the rival interpretation advocated in this essay, it is not true that we cannot settle these issues. Our error is to presuppose that the concept of the unconditioned has (...) application to physical reality. Once this presupposition has been abandoned, we can retrieve sound arguments from the antinomies, not indeed to demonstrate that the views originally being defended are correct, but to demonstrate that the views originally being attacked are incorrect. The essay concludes with some comments concerning how this disagreement relates to a broader disagreement about the best way to understand Kant. (shrink)

The aim of this essay is to identify the significance of animal research and its benefits in cognitive neuroscience research. This essay will evaluate the advantages of conducting research using animal models, its history, and the ethical issues surrounding this technique. It will further evaluate how the research has contributed to improve our knowledge of human brain functioning.