One problem with an appeal to libertarian free will is that no satisfactory account of the concept of libertarian free will is yet available. Thus, while the requirement that, in order to be free in the libertarian sense, an action not have any cause that lies outside the agent is unproblematic, this is obviously not a sufficient condition, since this condition would be satisfied if the behavior in question were caused by random events within the agent. So one needs to add that the agent is, in some sense, the cause of the action. But how is the causation in question to be understood? Present...