 Strevens (2007) develops Mackie’s theory further. On the way, he likewise gives up its reductive character by replacing sufficiency with causal sufficiency. The latter is to be understood in terms of causal entailment, which in turn is supposed to represent a causal process. (We explain Strevens’s theory of causation in greater detail in  §2.4.)  Notably, Strevens (2007) argues that Mackie’s original theory already solves not only the causal scenario known as overdetermination—as everyone agrees—but also (early and late) preemption. (For an overview of problematic causal scenarios, see Paul &amp; Hall 2013).