This argument requires a number of nontrivial assumptions. So there is no lack of places for an objector to attack, and, in fact, philosophers have tried various ways of discrediting the argument, none of them entirely convincing. Ockhamists (named after William of Ockham) try to defend the claim that many propositions apparently reporting God’s past beliefs are not wholly about the past, and thus are not accidentally necessary. Accordingly, Plantinga (1986) and some of the authors of the papers in Fisher (1989) on the distinction between “hard” facts and “soft” facts deny (4). But it has proven remarkably difficult to provide clear and persuasive principles for determining which propositions apparently about the past are not completely or really about the past.