Introduction to ArguMed 2.0
ArguMed 3 based on DefLog (2001)
ArguMed 2.0 (1999)
ArguMed 1.0 (1998)
From ArguMed's argumentation theory to the dialectical logic DefLog
In the paper 'Dialectical Argumentation as a Heuristic for Courtroom Decision
the expressiveness of the argumentation theory underlying ArguMed 2.0 (and the
corresponding graphical representation of dialectical arguments) has been extended. Any statement
can be attacked by any other statement, and the warrants of supporting and of attacking argument
steps are treated as ordinary sentences.
The thus extended argumentation theory has been implemented in the system ArguMed
3 based on
DefLog. In the paper 'DefLog: on the logical
interpretation of prima facie justified assumptions' the logical system DefLog is described.
The paper provides a thorough formal investigation of the argumentation theory underlying
ArguMed. DefLog is presented as a dialectical logic as
contrasted with a deductive logic such as
propositional logic. The adjective 'dialectical' is meant to suggest that DefLog is
a logic in which justification and defeat occur as a result of juxtaposed
opposing or contradictory claims. Further details on DefLog can be found in the
manuscript 'DefLog - a logic of
dialectical justification and defeat'.