An important challenge for non-naturalistic moral realism is that it seems hard to reconcile it with the (purported) fact of our reliability in forming correct moral beliefs. Some philosophers (including Cuneo and Shafer-Landau) have argued that we can appeal to conceptual truths about our moral concepts in order to respond to this challenge. Call this “the conceptual strategy”. The conceptual strategy faces a problem: it isn’t clear that the relevant moral concepts are “extension-revealing” in the way that the conceptual strategy (...) needs them to be. A further problem stems from the tradeoff between the “extension-revealing” and the “authority-revealing” aspects of normative concepts. To underscore the import of these issues, I discuss a version of the reliability challenge that concerns authoritative normative facts in ethics (rather than moral facts). The problems I identify for the conceptual strategy carry over to versions of it that are used in response to a range of epistemological arguments in ethics that (like the reliability challenge) are tied to Street’s “Darwinian Dilemma” argument. These problems also bear on the prospects of the conceptual strategy for explaining our (purported) reliability in other domains (e.g., in epistemology, law, and politics). (shrink)