The task of universal pragmatics is to identify and reconstruct universal conditions of possible mutual understanding. - Jürgen Habermas

The speaker must choose a comprehensible [verständlich] expression so that speaker and hearer can understand one another.

Reaching and understanding is the process of bringing about an agreement on the presupposed basis of validity claims that are mutually recognized.

All affected can accept the consequences and the side effects that [the norm's] general observance can be anticipated to have for the satisfaction of everyone's interests, and the consequences are preferred to those of known alternative possibilities for regulation.