 The possibility raised by Näger would circumvent the problem that violations of faithfulness ultimately undermine our ability to make suitable inferences of causal independence based on statistical independence by allowing only a specific kind of unfaithfulness—a principled or law-based unfaithfulness that is “internal” and is thus stable to background conditions—which is much less conspiratorial, as the fine-tuning is a function of the specific process involved. Evans (2018) argues that a basic retrocausal model of the sort envisaged by Costa de Beauregard (see  §1)  employs just such an internal cancelling paths explanation to account for the unfaithful (no signaling) causal channels. See also Almada et al. (2016) for an argument that fine tuning in the quantum context is robust and arises as a result of symmetry considerations.