Online research in philosophy

Consciousness is a hot topic. Relegated to the fringes of science for most of the twentieth century, the question of consciousness only crept back to legitimacy with the collapse of behaviourism in the 1960s and 1970s, and only recently became an acceptable term for psychologists to use. Now many neuroscientists talk enthusiastically about the nature of consciousness, there are societies and regular conferences, and some say that consciousness is the greatest challenge for twenty-first century science. Although confusion abounds, there is at least some agreement that at the heart of the problem lies the question of subjectivity - or what it’s like for _me_. As philosopher Thomas Nagel (1974) put it when he asked his famous question "What is it like to be a bat?" - if there is something it is like _for the bat_ then we can say that the bat is conscious. This is what we mean by consciousness - consciousness is private and subjective and this is why it is so difficult to understand.

My answer to the question why? is relatively uncontroversial among anthropologists. Sharing food makes good evolutionary sense, because animals who share food thereby insure themselves against hunger. It is for this reason that sharing food is thought to be so common in the natural world. The vampire bat is a particularly exotic example of a food-sharing species. The bats roost in caves in large numbers during the day. At night, they forage for prey, from whom they suck blood if they can, but they aren’t always successful. If they fail to obtain blood for several successive nights, they die. The evolutionary pressure to share blood is therefore strong. The biologist Wilkinson [59] reports that a hungry bat begs for blood from a roostmate, who will sometimes respond by regurgitating some of the blood it is carrying in its own stomach. This isn’t too surprising when the roostmates are related, but the bats also share blood with roostmates who aren’t relatives. The behaviour is nevertheless evolutionarily stable, because the sharing is done on a reciprocal basis, which means that a bat is much more likely to help out a roostmate that has helped it out in the past. Bats that refuse to help out their fellows therefore risk not being helped out themselves in the future. Vampire bats have their own way of sharing, and we have ours. We call our way of sharing “fairness”. If the accidents of our evolutionary history had led to our sharing in some other way, it would not occur to us to attribute some special role to our current fairness norms. Whatever alternative norms we then..

It is, as Dana Nelkin (2004) says, a rare point of agreement among participants in the free will debate that rational deliberation presupposes a belief in freedom. Of course, the precise content of that belief – and, indeed, the nature of deliberation – is controversial, with some philosophers claiming that deliberation commits us to a belief in libertarian free will (Taylor 1966; Ginet 1966), and others claiming that, on the contrary, deliberation presupposes nothing more than an epistemic openness that is entirely compatible with determinism (Dennett 1984; Kapitan 1986). Since, however, the claim that deliberation presupposes freedom is accepted by all sides in the free will debate, it ought to be possible to frame a minimal version that is neutral between compatibilism and incompatibilism, and which therefore can be accepted by everyone. Peter van Inwagen has advanced the best-known such claim: ‘all philosophers who have thought about deliberation agree on one point: one cannot deliberate about whether to perform a certain act unless one believes it is possible for one to perform it’ (van Inwagen 1983: 154). It is the purpose of this paper to argue that van Inwagen, and the many philosophers who have followed him in this regard, is wrong.

In "What is it Like to be a Bat?" Thomas Nagel argues that we cannot imagine what it is like to be a bat or presently understand how physicalism might be true. Both arguments have been seriously misunderstood. I defend them against various objections, point out a problem with the argument against physicalism, and show how the problem can be solved.

i l l ustrat es t he di ffi cul t y of providing a purely physical characterisation of phenomenal experi ence wi t ha vi vi d exampl e about a bat ’ s sensory apparatus. Whi l e a number of obj ect i ons have al ready been made to Nagel..