Contrary to appearances, binary schemas serve not only to separate but also to unite opposites. They facilitate the shift from one definition of the situation to its opposite by requiring no more than a negation, the admittance of which can be regulated in the system – a technique of paradoxical integration. There is a closer connection between truth and untruth than between truth and love, for instance.

Niklas Luhmann, Trust and Power, loc. 662