This paper aims to illuminate the deep explanatory challenge to normative realism that underlies two familiar objections to that view. According to the first objection, the realist cannot explain the distinctive deliberative significance of our normative thought. According to the second objection, the realist cannot explain how our normative thought has determinate representational content. This paper argues that, properly understood, these seemingly distinct objections are in fact mutually reinforcing sides of a single deep challenge to the realist's ability to explain what we know about our normative thought: the deliberation/representation challenge. I spell out this challenge and suggest that it is an excellent candidate for the deepest problem in the philosophy of mind for the normative realist. This paper also shows that addressing this challenge to the normative realist-as opposed to the moral realistis illuminating. There are natural and promising replies to each side of the challenge available to the moral realist that are not available to the normative realist. But focusing on the challenge to the normative realist helps us to see that these replies fail to address the challenge in its deepest and most general form.C ontroversy about the credibility of normative realism is endemic to contemporary metaethics. Some take realism to be "obviously, the default position," while others, to put it mildly, do not. 1,2 In the face of such persistent