 Substantive realism holds that there are objective criteria of correctness for moral judgments only if such judgments represent matters of fact about the way the world is. By contrast, the constructivist view is that there are objective criteria of moral judgment insofar as there are objective criteria about how to reason about practical matters. There are objective reasons that prohibit deceiving and manipulating others, but such reasons are the result of practical reasoning, rather than discovered by empirical investigation, grasped by the intellect, or revealed by some god. What makes this view “Kantian” is that there is ultimately one criterion for reasoning on practical matters, which is the Categorical Imperative. By reasoning according to this criterion, we objectively ground moral obligations, which are requirements of practical reason. 