If God is omniscient then he knows contingent facts. If he exists a se, then his knowledge of facts must not depend on them. How then does he know them? I take seriously Aquinas’ view that God’s knowledge is the cause of things. I argue that “things” includes both entities and situations, that God’s knowledge of them is his knowledge of his unimpedable will, and that the view does not threaten human freedom. God’s knowledge is thus like my knowledge of (...) my linguistic stipulations, except that whereas my knowledge is dedicta, his is de reo. (shrink)