ABSTRACT
In this chapter, we discuss the dialogue logic proposed by the German logician and philosopher Paul Lorenzen, and the ensuing theory of argumentation known as formal dialectics, developed by the Dutch logicians and philosophers Else Barth and Erik Krabbe. We think it more profitable to explain one type of theory within the much wider realm of dialogue theory in some detail than to give a survey of current developments. In trying to do justice to all, we would then do justice to none.
