 Another response to the problem of embedding correlations among outcomes in a causal structure has been to assume a type of holism which prohibits treating the spatially separated parts of the entangled system as distinct subsystems. The suggestion is instead to think of the measurement results at the two wings of the experiment as “a single indivisible non-local event” (Skyrms 1984). Hausman and Woodward (1999) argue that it also follows from an interventionist analysis that the measurement outcomes at the two wings of the experiment ought to be treated as a single non-local event. How to causally model entangled states remains a debated question.