 There is another sense of “local” that is sometimes used that will be worth avoiding for the purposes of clarity. This is the idea that causal influences are constrained along timelike trajectories. Thus, given Costa de Beauregard’s suggestion of “zigzag” causal influences, it is perfectly possible for a retrocausal model of quantum phenomena to be nonlocal in the sense that causal relations exist between spacelike separated events, but “local” in the sense that these causal influences are mediated by timelike trajectories. To avoid ambiguity, it will be useful to refer to this latter sense as “action-by-contact” (set apart from action-at-a-distance).