 While these strategies allow us to retain Reichenbach’s principle that correlations among non-causally related events are explained by a common cause that screens off these correlations, they come at a price and, as Wood and Spekkens (2015) show, violate a condition that goes by the names of faithfulness (Spirtes, Glymour, &amp; Scheines 1993 [2000: 35]), stability (Pearl 2009: 49), or no-fine-tuning and which states that every causal dependence implies a probabilistic dependence. Wood and Spekkens show that faithfulness, the causal Markov condition, and the assumptions that the quantum predictions are correct form an inconsistent set. Thus, at least one of the two conditions—faithfulness or the Markov condition—has to be given up.