Logic in Philosophy Johan van Benthem Abstract: Contacts between logic and philosophy are described in the form of several historical story lines, showing how subjects migrate naturally between logic, philosophy, and other areas such as mathematics, linguistics, or computer science. Examples include conditional reasoning and belief revision, epistemology and dynamic-epistemic logic, linguistic quantifiers and natural logic. The result is a presentation of current interfaces and the most pressing items on the research agenda which looks very different from classical more 'internal' accounts.