Is there a concept of fuzziness in the epistemological systems of Heinrich Hertz and Ludwig Wittgenstein?

"A picture is a model of reality", "A picture is a fact", and "We picture facts to ourselves" asserted Ludwig Wittgenstein in his Tractatus logico-philosophicus, thereby confirming the influence on his thinking - which he himself acknowledged - of Heinrich Hertz\´s Prinzipien der Mechanik (principles of mechanics). In this contribution the "picture" concept, which has a long tradition in philosophy, serves as the starting point of an interpretation of the relationship between real systems and theoretical structures of modern science. In addition, the approach dubbed as the "structuralist" approach of scientific theories in the 20^th century will be extended and enhanced by the concept of "fuzzy sets" and "fuzzy relations". This fuzzy structuralist view on scientific theories enables us to combine philosophy of science with the methodologies of Computing with words (CW) and the computational theory of perceptions (CTP). Finally we give future prospects of this work.