 Peter van Inwagen (2000) makes vivid the lack of control a libertarian agent has over genuinely undetermined events by considering what would happen if God rolled back the relevant stretch of history to some point prior to an undetermined event and then allowed it to unfold once more (N. Levy 2009a: 238). Since events would not unfold in the same way on the replay as they did the first time round, since these are genuinely undetermined, and nothing the agent does (or is) can ensure which undetermined possibility is realized, the outcome of this sequence (in this case the agent’s decision) is a matter of luck. Such luck, skeptics argue, is responsibility-undermining.