Classroom discussion can play an important role in the formation of citizens, and in more ways than one. Yet recitation persists as the discursive norm in classrooms, and the literature on discussion lacks clarity as to purpose. This article contributes a delineation of two purposes—interpretation (enlightenment) and decision making (engagement)—and argues that they are elemental to both discussion pedagogy and citizen formation. As practices, they upend recitation and offer an occasion for liberal education, including opening oneself to difference. The author aims to show that classroom discussion is useful both pedagogically and politically when the two purposes are articulated in a diverse school setting, and that critics risk their own interests when they dismiss the possibilities of discussion.