 In analogy to the case of the determinism challenge, one can resist the conclusion of the argument by denying premise 1 and maintain that causal constraints can play a legitimate and useful role in physical theorizing even if they are not part of a universal principle of causality. Thus, one could maintain that the relativistic constraint that influences do not propagate faster than the speed of light is a genuinely causal constraint, which functions as a desideratum on physical theories but does not lose its legitimacy and importance should it not be satisfied by all successful theories of physics.