 The leading contemporary incompatibilist, van Inwagen, rejects any suggestion that the compatibilist and the incompatibilist have a merely verbal disagreement, either because they are using different senses of ‘can’ (‘ability’, ‘power’, “free will” etc.) or because they are focusing on different contexts of utterance. The debate, he says, is about whether determinism has the consequence that no one is ever able to do otherwise (equivalently, that no one ever has it in their power to do otherwise) given what ordinary speakers mean, in the contexts in which they use these words. The contexts to which he is referring are the contexts of deliberation and choice in which we consider our options, while believing that we are able to pursue each of them. When a compatibilist asserts, and an incompatibilist denies, that a person at a deterministic world is sometimes able to do otherwise, they mean exactly the same thing by ‘is able to’; they mean what ordinary English speakers mean (in these contexts). The proposition asserted by the compatibilist is the proposition denied by the incompatibilist. Citing David Lewis as his example of a compatibilist opponent, van Inwagen says that he and Lewis cannot both be right. One of them is wrong, but neither is muddled or making a simple mistake (van Inwagen 2008).