Conditional Logics and Conditional Reasoning: New Joint Perspectives (Dagstuhl Seminar 19032)

In the last decades, with the emergence of artificial intelligence, a large number of logics called conditional logics have been introduced to model our conditional reasoning captured by so--called conditionals, which are statements of the form `if A then B'. More recently, conditional reasoning has also come under scrutiny by psychologists, yet with more pragmatic and empirical considerations. The main objective of this seminar was to provide an opportunity for these different communities working on that topic to meet and reinforce their ties. We focused on three specific issues. First, we investigated how people's intuitions about `counterpossibles' can be understood empirically and classified with respect to the theoretical accounts of conditional logics. Second, we reconsidered the various semantics of system P and we wondered to which extent pragmatics plays a role in the relevance relation between the antecedant and the consequent of a conditional. Third, we strove to apply the recent advances in proof theory and correspondence theory to conditional logics. These working groups were preceded by short talks and tutorials.