 While the appeal to agent causation might be thought to solve the problem of luck, the objection has been raised that in fact it does not help at all (Haji 2004; Mele 2005 and 2006: ch. 3; van Inwagen 1983: 145 and 2000). Consider Leo. At a certain moment he agent-causes a decision to tell the truth, and until he does there remains a chance that he will instead, at that moment, agent-cause a decision to lie. There is, then, a possible world that is exactly like the actual world up until the time at which Leo agent-causes his decision but in which, at that moment, Leo agent-causes a decision to lie. Nothing about the world prior to the moment of the agent-causing accounts for the difference between Leo’s causing one decision and his causing the other. This difference, then, is just a matter of luck. And if this difference is just a matter of luck, Leo cannot be responsible for his decision.