Arguments Using Ontological and Causal Knowledge

We explore an approach to reasoning about causes via argumentation. We consider a causal model for a physical system, and we look for arguments about facts. Some arguments are meant to provide explanations of facts whereas some challenge these explanations and so on. At the root of argumentation here, are causal links {A 1,i¾?i¾?i¾?,A n } causes B and also ontological links c 1 is_a c 2. We introduce here a logical approach which provides a candidate explanation {A 1,i¾?i¾?i¾?,A n } explains {B 1,i¾?i¾?i¾?,B m } by resorting to an underlying causal link substantiated with appropriate ontological links. Argumentation is then at work from these various explanation links. A case study is developed: a severe storm Xynthia that devastated a county in France in 2010, with an unaccountably high number of casualties.