"Perhaps the most serious objection against it is that there does not appear to be any way God could come by such knowledge. Knowledge, as we have seen, is not merely a matter of conceiving a proposition and correctly believing it to be true. It requires justification: one must have good reasons for believing. But what justification could God have for believing the propositions that are supposed to constitute middle knowledge? The truth of subjunctives of freedom cannot be discerned a priori, for they are contingent. It is not a necessary truth that if placed in circumstances C, I will decide to attend the concert tonight. Nor can we allow that God might learn the truth of C from my actual behavior — that is, by observing that I actually do, in circumstances C, decide to attend the concert. For God could not make observations like this without also finding out what creative decisions he is actually going to make, which would destroy the whole purpose of middle knowledge.”