If there are no conditions presently in place that determine a future free decision, then the proposition describing that decision is neither true nor false.

One tactic for preserving omniscience even while accepting the basic open theist view just described is to hold that God cannot be faulted for not knowing in advance how we will exercise our freedom, since until we do there is simply nothing to know. According to views of this kind, not all propositions about the future have a truth value. Some do, of course: it is a necessary truth that 2 + 2 = 4, and this proposition has as much bearing on the future as it does on the present and past. Similarly, a proposition concerning the future may have a truth value when its truth is causally determined...