Within the last decade the notion of knowledge has gained increasing attention in information systems research. Yet despite this development the understanding of ‘knowledge’ is still immature. Recognizing this issue, researchers have turned their attention toward fundamental aspects of the notion of knowledge, drawing on disciplines which are most relevant for the study of knowledge, e.g., philosophy or sociology of knowledge. We draw on the discipline of media-philosophy and show how this can help to develop a sound understanding of knowledge and contribute to the ‘re-discovery’ of important forms of knowledge that so far have been neglected in information systems research.