 There is a tradition in philosophy for regarding the very idea of retrocausality as incoherent. The most prominent worry, forcefully made by Black (1956), is the so-called “bilking argument” (see the entry on  time travel).  Imagine a pair of events, a cause, C, and an effect, E, which we believe to be retrocausally connected (E occurs earlier in time than C). It seems possible to devise an experiment which could confirm whether our belief in the retrocausal connection is correct or not. Namely, once we had observed that E had occurred, we could then set about ensuring that C does not occur, thereby breaking any retrocausal connection that could have existed between them. If we were successful in doing this, then the effect would have been “bilked” of its cause.