The media-code itself therefore consists of symbolically generalized rules about the possible combination of other symbols which guide the process of selections for experiencing or acting. Included in the truth-code, for example, are general rules of logic, the current concept of truth, criteria for the acceptability of methods, but not the theories and individual insights which are offered as being possibly true in particular cases. Likewise, included in the power-code is the symbolization of the power sources, of limitations on power, etc., but not the particular selections of the power-holder, his wishes, his orders. The code itself can then outlive changes in particular subject areas and can be stabilized, relatively speaking, independently of them.

DEFINE: Distinguishes the symbolic code (general rules, logic, criteria) from the specific content (theories, orders, insights) that operates under it. The code is stable while content varies.

Niklas Luhmann, Trust and Power, loc. 649