"Thinking science" is a book that theorize the grounding of performativity theory under common sense everyday life world sociology and discuss a reconstruction of the relation between subject-object in epistemology as it evolutioned to be seen from ancients and classics to modern thought thus from Aristoteles, Kant and hegel, to modern and contemporary sciences, as to ties up and clarify new current new paths, avenues and possibilities to performativity theory within theoretical thought and empirical research. The book forth develop a theorization on the relation between subject and object from the perspective of the logic of concepts focussing a discussion which counterpoint Hegel logic of concept and Kant. The book demonstrate a contemporary phenomenological avenue which attain to renew, enrich, reach and innovate the discussion on this issue in between philosophy and phenomenological sociology. Indeed a full classical philosophy theory on the phenomenology of concepts is developed.