 Most theorists would agree that A’s claim-right gives B what Raz (1975, 35–48) calls an exclusionary reason: a second-order reason not to act on some first-order reason. Dworkin’s trumping metaphor makes it tempting to characterize the normative force of rights in the stronger terms of conclusive reasons. We could indeed attempt to define the Hohfeldian incidents in these terms. A’s having a claim-right that B φ would imply that B has a conclusive reason to φ, and A’s having a privilege-right to φ would imply that A has no conclusive reason not to φ. Powers and immunities would then determine the ways in which agents were and were not able to alter the patterns of conclusive reasons in the world.