Abstract: This article aims at elucidating the ways in which philosophy may engage in cooperation with other disciplines through “philosophy with” (Hansson 2008). An exemplary investigation is undertaken of the roles of epistemology in investigating knowledge, that is, how epistemology may interact with sciences concerned with knowledge. Four possible roles are distinguished: provider of a priori conceptual analyses, clarifier of scientific concepts and their implications, interpreter of scientific results, and dialogue partner with a voice of its own. Each role is (...) illustrated by contemporary texts, and it is argued that the role of dialogue partner is the most fruitful. (shrink)