 If this is right, then Ockham’s idea seems to imply that we have the ability to do something now such that if we were to do it, then the past would have been different (because God would known what we would do differently and hence would have acted differently in the past). Some philosophers refer to this kind of ability as “counterfactual power over the past.” Alvin Plantinga has this idea in mind in his defense of Ockham’s account of God’s foreknowledge of the contingent future when he says that “it is possible that there is an action such that it is within your power to perform it and such that if you were to perform it, then God would not have created Abraham” (Plantinga 1986, 257). Along the same lines, Edward Wierenga suggests that according to Ockham, Peter has the power to do something such that if he were to do it, then Jesus would not have intended what he said about Peter’s future denials as a prophecy (Wierenga 1991, 440). In other words, Jesus uttered words that actually did constitute a prophecy, but those same words would not have been a prophecy had Peter chosen otherwise (Wierenga 1991, 440). 