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In this book two of the leading figures in argumentation theory present a view of argumentation as a means of resolving differences of opinion by testing the acceptability of the disputed positions. Their model of a 'critical discussion' serves as a theoretical tool for analysing, evaluating and producing argumentative discourse. They develop a method for the reconstruction of argumentative discourse that takes into account all aspects that are relevant to a critical assessment. They also propose a practical code of behaviour for discussants who want to resolve their differences in a reasonable way. This is a major contribution to the study of argumentation and will be of particular value to professionals and graduate students in speech communication, informal logic, rhetoric, critical thinking, linguistics, and philosophy.

An important tool for scientific study in any field is a formal language in which the phenomena can be described and hypotheses formulated. In this book a formal notation is developed for the description of the cognitive structure of arguments. The analyses based on this notation are more fine-grained than the analyses in previous attempts, and they are applicable not only to arguments but to all types of moves in a discourse. Further, the notational system provides a basis for the description of relations between arguments and the structure of the discourse as a whole. In the final chapter, some empirical studies of retention of arguments in memory and of précis writing are reported, based on hypotheses formulated in terms of the notational system.

The contributions in the first part 'Re-modelling logic' of this volume take account of formal logic in the theory of 'rational' argumentation. Part two contains papers that distinguish the various dialogue games for logics in terms of 'rights' and 'obligations' of the players. The authors following in the third section study the interaction between participants in a dialogue. Here the tools of the logician are used for the wider purpose of studying the nature of dialogue. The fourth section concern modes of argumentation that are actually found in philosopical texts from earlier centuries. To be followed by contributions in Part five that may be read as attempts to retrieve what was left of the spirit of criticism and debate in philosphy after the onslaught of Cartesianism and idealism.