 Boethius (c480–524) offered a solution to the problem which in effect denied the supposition that God existed in 1900 or believed anything in 1900 (Boethius, The Consolation of Philosophy, Book V). God is, on this view, outside time; he is timelessly eternal. Thomas Aquinas (1225–74) also offered this solution (Aquinas, Summa Theologica, Article 13). The idea behind the solution is, of course, that if God’s knowledge is not temporal there is no reason why Jones should not have the power to bring it about that God knows that he refrains from mowing the lawn on 1/1/2000 instead of knowing that he mows the lawn then, since possessing that power would not require having the power to affect the past.