 Turning for a moment to moral experience, one controversy (which we discuss below in  section 2),  is whether certain types of moral perceptual experience purport to present instantiated moral properties. If so, and if one takes such experience to bear on philosophical disputes over moral metaphysics, then one can appeal to such experiences as providing presumptive evidence for some form of moral realism. Suppose, though, that one cannot reliably tell by directly introspecting one’s moral experiences whether they have such realist purport. One might then hope to provide evidence that such experiences do have such purport by employing a phenomenal contrast argument.