[Critical social science attempts] to determine when theoretical statements grasp invariant regularities of social action as such and when they expre… - Jürgen Habermas

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

Habermas (1972) "Sprachspiel, intention und Bedeutung. Zu Motiven bei Sellars und Wittgenstein". In R.W. Wiggerhaus (Ed.) Sprachanalyse and Soziologie. Frankfurt: Suhrkamp). p. 334

As historical and social beings we find ourselves always already in a linguistically structured lifeworld. In the forms of communication through which we reach an understanding with one another about something in the world and about ourselves, we encounter a transcending power. Language is not a kind of private property. No one possesses exclusive rights over the common medium of the communicative practices we must intersubjectively share. No single participant can control the structure, or even the course, of processes of reaching understanding and self-understanding. How speakers and hearers make use of their communicative freedom to take yes- or no-positions is not a matter of their subjective discretion. For they are free only in virtue of the binding force of the justifiable claims they raise towards one another. The logos of language embodies the power of the intersubjective, which precedes and grounds the subjectivity of speakers.