Full Idea
Habermas claims that what is regarded as a priori changes with history. This is because the linguistic structures on which judgements depend are themselves part of history, not prior to it.
Gist of Idea
What is considered a priori changes as language changes
Source
report of Jürgen Habermas (The Theory of Communicative Action [1981]) by Andrew Bowie - Introduction to German Philosophy Conc 'Habermas'
Book Reference
Bowie,Andrew: 'Introduction to German Philosophy' [Polity 2003], p.258
A Reaction
This is an interesting style of argument generally only found in continental philosophers, because they see the problem as historical rather than timeless. Compare Idea 20595, which sees analyticity historically.
Related Idea
Idea 20959 Concepts are only analytic once the predicate is absorbed into the subject [Schleiermacher]