Rationality and Kinds of Reasons

ABSTRACT In his ‘Rationality versus Normativity’, John Broome argues against the view that rationality is reducible to normativity. Broome’s argument rests on the claim that while rationality supervenes on the mind, normativity does not. In this commentary, I argue that Broome's arguments succeed only against views on which reasons and normativity are univocal. Once we admit of multiple kinds of normative reasons, some fact-given and others non-factive, a version of the reasons-responsiveness view emerges that is untouched by Broome's arguments. On such a view, rationality supervenes on non-factive reasons, not on fact-given ones, so rationality supervenes on a kind of normativity that supervenes on the mind. This shows that Broome has not refuted reasons-responsiveness views wholesale. Moreover, because Broome’s arguments do refute univocal versions of reasons-responsiveness views, they provide a justification for preferring non-univocal versions of reasons-responsiveness views to univocal ones.