 Does this provide an answer to the objection, or does it rely on one? As pointed out by Brian Leftow in a similar context (Leftow 1991: 173; also Fales 1997), on the view proposed, the temporal and the eternal can enter into causal relations only if they are in some sense simultaneous. That is the reason ET-simultaneity is invoked. If one then relies on a notion of ET-causality in the definition of ET-simultaneity one faces a problem of circularity.