Abstract

In his seminal book, The Second-Person Standpoint, Stephen Darwall argues that second-personal reasons can only occur within the realm of practical reason. In order to demonstrate this, Darwall builds on David Velleman’s distinction between substantive and formal aims of thought and action. I show that this distinction shapes Darwall’s conception of the nature of the difference between third-personal and second-personal reasons in such a way that the difference is conceived of as substantive rather than formal. As a consequence, Darwall is left without a satisfactory rendering of both the distinctions between third-and second-personal reasons and the distinction between theoretical and practical reason. Conceiving of these distinctions as formal, however, would open up the possibility of second-personal forms of theoretical reason.