Full Idea
Criteria or rules do not somehow apply to themselves. They must be judged by the sort of rational insight or intuition that the rationalist is advocating.
Gist of Idea
Our rules of thought can only be judged by pure rational insight
Source
Laurence Bonjour (In Defence of Pure Reason [1998], §5.2)
Book Reference
Bonjour,Laurence: 'In Defense of Pure Reason' [CUP 1998], p.131