Dialectical Explanations in Defeasible Argumentation.

ALEJANDRO J. GARCÍA; NICOLÁS D. ROTSTEIN; GUILLERMO R. SIMARI

Conferencia; Symbolic and Quantitative Approaches to Reasoning with Uncertainty, 9th European Conference, ECSQARU 2007; 2007

This work addresses the problem of providing explanation capabili-ties to an argumentation system. Explanation in defeasible argumentation is animportant, and yet undeveloped field in the area. Therefore, we move in this di-rection by defining a concrete argument system with explanation facilities.We consider the structures that provide information on the warrant status ofa literal. Our focus is put on argumentation systems based on a dialectical proofprocedure, therefore we study dialectical explanations. Although arguments rep-resent a form of explanation for a literal, we study the complete set of dialecticaltrees that justifies the warrant status of a literal, since this set has proved to be auseful tool to comprehend, analyze, develop, and debug argumentation systems.