Korsgaard (2009) argues, against Kolodny (2005) and Broome (2007), that rational requirements are in fact normative. In her view the normativity of rational requirements is a function of their constitutive role in the deliberative activity of reason. After surveying the treatment of this question in the relevant literature, I explain Korsgaard\u27s theory using pure constructivism as a framing device. I then argue that not only is her account of deliberative reason as an activity unsatisfactory (specifically, it fails to defeat the intuition that charges of boot-strapping are deeply problematic, and makes the adoption of reasons for belief from the deliberative perspective a function of an agent\u27s commitment to principles and not of her ...