 Epicurus agrees (Fat. 19). On the other hand, if there is “motion without a cause”, i.e., events that are not causally determined, then both Epicurus and the Stoics agree that not every statement is either true or false (Fat. 20–1, LS 38G). The future has not occurred yet, so nothing exists at present to make a statement about the future true unless there presently exist sufficient conditions to bring about the state of affairs predicted by the statement.