  Another attempt to demonstrate the impossibility of certain relativistic quantum theories on the grounds of causal paradoxes is advanced by Maudlin (1994, pp. 195-201). (Maudlin does not present his argument in these terms, but the argument is in effect based on such grounds.) Recall (sections 2 and 9) that a way to try to reconcile quantum mechanics with relativity is to account for the curious correlations between distant systems by local backward influences rather than non-local influences. In particular, one may postulate that the correlations between the distant measurement outcomes in the EPR/B experiment are due to local influences from the measurement events backward to the state of the particle pair at the source. In such models of the EPR/B experiment, influences on events are always confined to events that occur in their past or future light cones, and no non-locality is postulated. Maudlin argues that theories that postulate such backward causation will be inconsistent. More particularly, he argues that a plausible reading of Cramer's (1980, 1986) transactional interpretation, and any other theory that similarly attempts to account for the EPR/B correlations by postulating causation from the measurement events backward to the source, will be inconsistent. 