ABSTRACT
This chapter presents some reasons for bringing together the ideas of communicative planning theory and social choice theory. The amalgamation of arguments leading to a dialogical outcome relation is here called a ‘dialogical decision procedure’. Pairwise comparisons are assumed here, and the problem is that the dialogical decision procedure may give a unique outcome relation even if every argument relation is transitive. The conditions for his general impossibility theorem of social choice are rephrased to fit this context, and it is argued that the reformulated conditions must be fulfilled by a dialogical decision procedure meant to be attractive in the sense of being communicatively rational. The dialogical decision procedure automatically make the priority sequence of any single argument relation the ordering of the dialogical outcome relation, regardless of the priority sequences of all the other argument relations.
