 As a brief aside, this fine-tuning worry for retrocausality in the quantum context arises in a more straightforward way. There is no good evidence to suggest that signaling towards the past is possible; that is, there is no retrocausality at the operational level. (Pegg 2006, 2008 argues that this can be explained formally as a result of the completeness condition on the measurement operators, introducing an asymmetry in normalization conditions for preparation and measurement.) Yet, despite there being no signaling towards the past, retrocausal accounts assume causal influences towards past. That these causal influences do not show up as statistical dependences exploitable for signaling purposes raises exactly the same fine-tuning worry as Wood and Spekkens raise.