Fuzzy epistemology: The fuzziness of experimental systems

Fuzzy sets and systems (FSS) fill the gap between scientific theories and observable real systems and phenomena. In philosophy and history of science and technology this gap carries a great potential for epistemological discussions. A new approach in this area is Hans-Jorg Rheinberger\´s "historical epistemology" dealing with the concept of "experimental systems". In this paper we first summarize some facts on the theory of FSS and Computational Intelligence, then we give a brief sketch of Rheinberger\´s "experimental systems", "epistemic" and "technological things", and finally we propose to combine Rheinberger\´s approach with FSS methodologies.