 Since preparations, transformations, and measurements have been replaced by local controllables, there is no extra assumption in Shrapnel and Costa’s framework that \(\omega\) is correlated with some controllables but independent of others. Thus the usual route out of the ontological models framework, and so the no-go theorems of  §3,  open to retrocausal approaches—that the framework assumes no retrocausality—is closed off in the Shrapnel-Costa theorem, rendering retrocausal approaches contextual along with the rest of the models captured by the ontological models framework.