The issue of representing attacks to attacks in argumentation is receiving an increasing attention as a useful conceptual modelling tool in several contexts. In this paper we present AFRA, a formalism encompassing unlimited recursive attacks within argumentation frameworks. AFRA satisfies the basic requirements of definition simplicity and rigorous compatibility with Dung's theory of argumentation. This paper provides a complete development of the AFRA formalism complemented by illustrative examples and a detailed comparison with other recursive attack formalizations.
@article{arxiv.1810.04886,
title = {AFRA: Argumentation framework with recursive attacks},
author = {Pietro Baroni and Federico Cerutti and Massimiliano Giacomin and Giovanni Guida},
journal= {arXiv preprint arXiv:1810.04886},
year = {2018}
}