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

[According to Habermas, the genesis of the bourgeois public sphere resulted from a combination of early capitalist commercial development and the organization of territorial … Representative publicness involved a re-presenting or staging for the purposes of display and acclamation, hence] this publicness (or publicity) of representation was not constituted as a social realm, that is, as a public sphere; rather, it was something like a status attribute, if this term may be permitted.

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

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