This article examines and discusses the presuppositions behind the answer that Paul Ricœur brought to the question "What is practical reason?" in a series of studies that led to the "little ethics" of Oneself as Another. The conception defended by Ricœur is presented as a sort of reconciliation, or composition, of Aristotelian ethics and Kantian morality. Two problems in particular are raised: the first is raised by the questionable nature of Ricœur's interpretation of the positions that he synthesizes; the second concerns the model - dialectic or eclectic - of this synthesis.