The following investigations attempt this transition to a radically anti-humanist, a radically anti-regionalist and a radically constructivist concep… - Niklas Luhmann

The activity of observing establishes a distinction in a space that remains unmarked, the space from which the observer executes the distinction. The observer must employ a distinction in order to generate the difference between unmarked and marked space, and between himself and what he indicates. The whole point of this distinction (its intention) is to mark something as distinct from something else. At the same time, the observer — in drawing a distinction - makes himself visable to others. He betrays his presence - even if a further distinction is required to distinguish him.

No matter how abstractly formulated are a general theory of systems, a general theory of evolution and a general theory of communication, all three theoretical components are necessary for the specifically sociological theory of society. They are mutually interdependent.

We are still spellbound by a tradition that arranged psychological faculties hierarchically, relegating ‘sensuousness’ — that is, perception — to a lower position in comparison to higher, reflective functions of reason and understanding. The most advanced versions of ‘conceptual art’ still follow this tradition. By refusing to base themselves in sensuously perceptible distinctions between works of art and other objects, these works seek to avoid reducing art to the realm of sense perception.