One standard objection to the view that phenomenal experience is functionally determined is based upon what has come to be called ‘The Absent Qualia Hypothesis’, the idea that there could be a person or a machine that was functionally exactly like us but that felt or consciously experienced nothing at all (see Block, 1980; Block and Fodor, 1980; Campbell, 1980; Nagel, 1980). Advocates of this hypothesis typically maintain that we can easily imagine possible systems that meet the appropriate functional specifications but that intuitively lack any phenomenal consciousness. Ned Block (1980), for example, asks us to suppose that a billion Chinese people are each given a two-way radio with which to communicate with one another and with an artificial (brainless) body. The movements of the body are controlled by the radio signals, and the signals themselves are made in accordance with instructions the Chinese people receive from a vast display in the sky which is visible to all of them. The instructions are such that the participating Chinese people together realize whatever programs the functionalist supposes underlie human phenomenal experience.

The philosophy of memory has been largely dominated by what could be called ‘the representative theory of memory’. In trying to give an account of ‘what goes on in one's mind’ when one remembers something, or of what ‘the mental content of remembering’ consists, philosophers have usually insisted that there must be some sort of mental image, picture, or copy of what is remembered. Aristotle said that there must be ‘something like a picture or impression’; William James thought that there must be in the mind 'an image or copy’ of the original event; Russell said that ‘Memory demands an image’. In addition to the image or copy a variety of other mental phenomena have been thought to be necessary. In order for a memory image to be distinguished from an expectation image, the former must be accompanied by ‘a feeling of pastness’. One has confidence that the image is of something that actually occurred because the image is attended by ‘a feeling of familiarity’. And in order that you may be sure that the past event not merely occurred but that you witnessed it, your image of the event must be presented to you with a feeling of ‘warmth and intimacy’. When all the required phenomena are put together, the mental content of remembering turns out to be, as William James says, ‘a very complex representation’.

It is widely held that the normativity of truth and meaning puts a severe constraint on acceptable theories of these phenomena. This constraint is so severe, some would say, as to rule out purely ‘naturalistic’ or ‘factual’ accounts of them. In particular, it is commonly supposed that the deflationary view of truth and the use conception of meaning, in so far as they are articulated in entirely non-normative terms, must for that reason be inadequate.

To be told, ‘know thyself’ is to be told that I don't know myself yet: it carries the assumption that I am in some sense distracted from what or who I actually am, that I am in error or at least ignorance about myself. It thus further suggests that my habitual stresses, confusions and frustrations are substantially the result of failure or inability to see what is most profoundly true of me: the complex character of my injuries or traumas, the distinctive potential given me by my history and temperament. I conceal my true feelings from my knowing self; I am content to accept the ways in which other people define me, and so fail to ‘take my own authority’ and decide for myself who or what I shall be. The therapy-orientated culture of the North Atlantic world in the past couple of decades has increasingly taken this picture as foundational, looking to ‘self-discovery’ or ‘self-realization’ as the precondition of moral and mental welfare. And the sense of individual alienation from a true and authoritative selfhood mirrors the political struggle for the right of hitherto disadvantaged groups, especially non-white and non-male, to establish their own self-definition. The rhetoric of discovering a true but buried identity spreads over both private and political spheres. The slogan of the earliest generation of articulate feminists, ‘The personal is the political’, expresses the recognition of how this connection might be made.

Our reading is a passage from John Locke, An Essay Concerning Human Understanding, Book III, Chapter II, § 2.

When a man speaks to another, it is that he may be understood; and the end of speech is that those sounds, as marks, may make known his ideas to the hearer. … Words being voluntary signs, they cannot be voluntary signs imposed by him on things he knows not. That would be to make them signs of nothing, sounds without signification.

Humans are part of the animal kingdom, but their minds differ from those of other animals. They are capable of many things that lie beyond the intellectual powers ofthe rest of the animal realm. In this paper, I want to ask what makes human minds distinctive. What accounts for the special powers that set humans aside from other animals?

Modern science is not linguistically original in hypothesizing the existence of dark matter. For Plotinus, the matter that underlies all perceptible objects, is essentially obscure and describable only in the negative terms of what it lacks by way of inherent properties. In formulating this theory of absolute matter, Plotinus took himself to be interpreting both Plato and Aristotle, with the result that his own position emerges as a highly original and equivocal synthesis of this tradition. Plotinus did not claim that matter is nothing, but the puzzling status he attributes to it can be aptly compared to Berkeley's doctrine that material substance is a self-contradictory notion.

Descartes first invokes the errors of the senses in the Meditations to generate doubt; he suggests that because the senses sometimes deceive, we have reason not to trust them. This use of sensory error to fuel a sceptical argument fits a traditional interpretation of the Meditations as a work concerned with finding a form of certainty that is proof against any sceptical doubt. If we focus instead on Descartes's aim of using the Meditations to lay foundations for his new science, his appeals to sensory error take on a different aspect. Descartes's new science is based on ideas innate in the intellect, ideas that are validated by the benevolence of our creator. Appeals to sensory error are useful to him in undermining our naïve faith in the senses and guiding us to an appreciation of innate ideas. However, the errors of the senses pose problems in the context of Descartes's appeals to God's goodness to validate innate ideas and natural propensities to belief. A natural tendency to sensory error is hard to reconcile with the benevolence of our creator. This paper explores Descartes's responses to the problems of theodicy posed by various forms of sensory error. It argues that natural judgements involved in our visual perception of distance, size and shape pose a problem of error that resists his usual solutions.

To be asked to provide a short paper on Wittgenstein's views on mathematical proof is to be given a tall order (especially if little or no familiarity either with mathematics or with Wittgenstein's philosophy is to be presupposed!). Close to one half of Wittgenstein's writings after 1929 concerned mathematics, and the roots of his discussions, which contain a bewildering variety of underdeveloped and sometimes conflicting suggestions, go deep to some of the most basic and difficult ideas in his later philosophy. So my aims in what follows are forced to be modest. I shall sketch an intuitively attractive philosophy of mathematics and illustrate Wittgenstein's opposition to it. I shall explain why, contrary to what is often supposed, that opposition cannot be fully satisfactorily explained by tracing it back to the discussions of following a rule in the Philosophical Investigations and Remarks on the Foundations of Mathematics. Finally, I shall try to indicate very briefly something of the real motivation for Wittgenstein's more strikingly deflationary suggestions about mathematical proof, and canvass a reason why it may not in the end be possible to uphold them.

Popper wrote extensively on the quantum theory. In Logic der Forschung (LSD) he devoted a whole chapter to the topic, while the whole of Volume 3 of the Postscript to the Logic of Scientific Discovery is devoted to the quantum theory. This volume entitled Quantum Theory and the Schism in Physics (QTSP) incorporated a famous earlier essay, ‘Quantum Mechanics without “the Observer”’ (QM). In addition Popper's development of the propensity interpretation of probability was much influenced by his views on the role of probability in quantum theory, and he also wrote an insightful critique of the 1936 paper of Birkhoff and von Neumann on nondistributive quantum logic (BNIQM).

Group creativity is vital in overcoming the numerous challenges that the world faces. Yet group creativity is deeply puzzling. It seems plausible that only agents can be creative, so group creativity requires group agency. But how could groups possess the mental states required to be agents, let alone the rich range of them required to be creative? It appears more reasonable to hold that group creativity is not a real phenomenon, but is merely the summed creativity of the individuals forming the group. There is also much empirical evidence that groups are no more creative than their members. In this paper I examine the conceptual and empirical challenges to group creativity, defend its existence, and offer an explanation of how it is possible.

This paper makes the case for amnesty of irregular migrants by reflecting on the conditions under which a wrong that is done in the past can be considered superseded. It explores the relation between historical injustice and irregular migration and suggests that we should hold states to the same stringent standards of compliance with just norms that they apply to the assessment of the moral conduct of individual migrants. It concludes that those standards ought to orient migrants and citizens’ moral assessment of how their states handle questions of irregular migration and to inform political initiatives compatible with these moral assessments.

Most early modern philosophers held that our emotions are always passions: to experience an emotion is to undergo something rather than to do something. Spinoza is different; he holds that our emotions – what he calls our ‘affects’ – can be actions rather than passions. Moreover, we can convert a passive affect into an active one simply by forming a clear and distinct idea of it. This theory is difficult to understand. I defend the interpretation R.G. Collingwood gives of it in his book, The Principles of Art. An affect, it turns out, is passive when it is ambiguous whether we or somebody else is the subject of the affect. An affect is active when we fully accept the affect as our own. Here, I outline Collingwood's interpretation and then develop it further.

In this paper, I discuss the nature and consequences of confabulation about political opinions and behaviours. When people confabulate, they give reasons for their choices or behaviour which are ill-grounded and do not capture what really brought the behaviour about, but they do this with no intention to deceive and endorse their own accounts. I suggest that this can happen when people are asked why they voted a certain way, or support certain campaigns, and so on. Confabulating in these political contexts seems bad because we do not get a fully truthful account of why some political choice was made, and so the reasoning behind the choice is under-scrutinised. However, I argue that if people have a virtue of self-regulation, confabulation in political contexts can actually be part of the process of coming to better understand our political choices and embody more consistently the political values which we ascribe to.

Much of traditional natural theology offers causal explanations- e.g. for the universe's existence and ability to host our sort of life. But a less-remarked strand offers ontological explanations, claiming that theories involving God are the best answers to ontological questions. Leibniz, for instance, wrote in the Monadology that

Pictures have always played a prominent role in philosophical speculation about the mind, but the concept of a picture has itself been the object of philosophical scrutiny only intermittently. As a matter of fact, it was studied most intensively in the course of a theological controversy in the Eastern Roman Empire, during the eighth century - which is a sufficient indication of its marginal place in the history of philosophy. Perhaps this is because pictures have never produced in us the theoretical paralysis which Augustine famously associated with time, but have on the contrary generally seemed too unproblematic to deserve much time from philosophers. Even today, after several decades of accumulating theory, philosophers with no stake in the matter are often impervious to its charm. I feel some sympathy for this attitude, because the task of explaining the nature of depiction is, I believe, one which calls for the refinement rather than refutation of our first thoughts about it. But a precise understanding of depiction is both a necessary prolegomenon to a significant part of aesthetics, and a useful prophylactic against confusion in the theory of the imagination. Besides, there is also the pleasure of the chase, which J. L. Austin nonchalantly appealed to many years before the Research Assessment Exercise was inaugurated.

Religious disagreement is, quite understandably, viewed as a problem for religious belief. In this paper, I consider why religious disagreement is a problem—why it is a potential defeater for religious belief—and I propose a way of dealing with this sort of potential defeater. I begin by focusing elsewhere—on arguments for radical skepticism. In section 1, I consider skeptical arguments proposed as potential defeaters for all of our perceptual and memory beliefs and explain what I think the rational response is to such potential defeaters, emphasizing the way epistemic intuitions are involved in both the skeptical arguments and my recommended response. In section 2, I discuss the way in which peer disagreement—on any topic—is a potential defeater for our beliefs, highlighting the conditions under which recognized disagreement is a successful defeater and those under which it isn't. In the third section, I consider how to use a section-1 type of response to deal with a section-2 type of defeater for religious belief.

So is this it: I must recognize certain authorities in order to make judgments at all? (OC, 493)

I want in this paper to consider Wittgenstein's great posthumous work On Certainty in a different perspective from the usual: from the point of view of certain deep questions in political philosophy. These questions concern the nature of the state's authority and the citizen/s obligation to it; the notion of legitimacy and the role of consent in this context. Such issues have many dimensions; but they arise in part out of difficulties in reconciling the application of such concepts with our understanding of human rationality, especially practical rationality. I think it has been, and remains, characteristic of the main tradition of discussion of such issues to leave certain important questions about the nature of practical rationality unasked. I believe that these questions are asked, though in a different context, in Wittgenstein's On Certainty.