Abduction in argumentation: Two representations that reveal its different functions

Overview & Synopsis

Abduction can function in argumentation and proving processes in different ways. In this paper we focus on the ways in which abductive arguments, taking place in argumentation and proving processes, can be reconstructed in the frame of a Global Argumentation Structure (GAS). We propose two different ways to model abductive arguments within a GAS, with a forward or a backward flow, depending on the function of these arguments in the whole argumentation.