The proposed discourse is motivated through a bewilderment due to conflicting opinions. It has been the basic intention behind systems theory to include lifeworld into science with reference to Heidegger’s fundamental ontology and the concept of being-in-the-world. However, it was Heidegger, above all, who warned from the supra-theoretical hubris of systems theory and cybernetics. In “The end of philosophy” in 1969 he anticipated: “No prophecy is necessary to recognize that the sciences now establishing themselves will soon be determined and steered by the new fundamental science which is called cybernetics. […] The arts become regulated-regulating instruments of information.“ To reverse once more, Heidegger’s philosophy has reasonably been certified (e.g. by Rüdiger Rimpler) to contain itself processuality and performativity. Others regard it as mysticism. Is mysticism the fate of performative science, too? Last but not least, the more recent phenomenological streams strongly influenced by French thinkers like Maurice Merleau-Ponty or Michel Henry should be mentioned for they particularly add corporeality as an important aspect of performativity and understanding, i.e. the bodily involvement in doing, which is also considered to play the major role of performative science.

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