Yes, no, maybe, I don’t know: Complexity and application of abstract argumentation with incomplete knowledge

Abstract argumentation, as originally defined by Dung, is a model that allows the description of certain information about arguments and relationships between them: in an abstract argumentation framework (AF), agent knows for sure whether given argument or attack exists. It means absence two can be interpreted “we know first does not second one”. But question uncertainty has received much attention last years. In this paper, we survey approaches allow to express like “There may (or not) these arguments”. We describe main models incorporate qualitative ignorance) well some applications models. also highlight open questions deserve future.