id: 06110862 dt: a an: 06110862 au: Seising, Rudolf ti: Measures of observables and measures of fuzziness. so: Greco, Salvatore (ed.) et al., Advances in computational intelligence. 14th international conference on information processing and management of uncertainty in knowledge-based systems, IPMU 2012, Catania, Italy, July 9‒13, 2012. Proceedings, Part II. Berlin: Springer (ISBN 978-3-642-31714-9/pbk; 978-3-642-31715-6/ebook). Communications in Computer and Information Science 298, 52-61 (2012). py: 2012 pu: Berlin: Springer la: EN cc: ut: ci: li: doi:10.1007/978-3-642-31715-6_7 ab: Summary: The key aims of modern scientific work have generally been to find relationships between observed phenomena, construct mathematical formulas that describe these relationships, take measurements of the observables, and define axioms using terms that are as exact as possible. In many circumstances, the exactness of observed phenomena is limited ‒ or can only be measured with less than perfect accuracy. However, another problem arises if the concepts of a scientific theory do not fit with the picture that scientists use to understand their observations and experimental results. How to deal with such situations is a question that has intrigued many scientists and philosophers. In the 20th century two scientific theories appeared that change scientist’s views from classical to non-classical and on what is measurable: quantum mechanics and fuzzy set theory. This paper focuses on these developments. rv: