Abstract

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.