Full Idea
Understanding is itself based on a priori commitment.
Gist of Idea
Understanding needs a priori commitment
Source
Paul Horwich (Stipulation, Meaning and Apriority [2000], §12)
Book Reference
'New Essays on the A Priori', ed/tr. Boghossian,P /Peacocke,C [OUP 2000], p.169
A Reaction
This sounds plausible, but needs more justification than Horwich offers. This is the sort of New Rationalist idea I associate with Bonjour. The crucial feature of the New lot is, I take it, their fallibilism. All understanding is provisional.