The purpose of this paper is to show that genuine dialogue is a refined human achievement and probably the most valid criterion on the basis of which we can evaluate educational or social policy and practice. The paper explores the prerequisites of dialogue in the language games, the common certainties, the rules of logic and the variety of common virtues; defends dialogue as a normative concept and interprets the principles of dialogue as extensions of its prerequisite virtues. Finally, it examines the social conditions that are conducive to dialogue and those that frustrate it. (Contains 4 notes.)