Full Idea
I call all cognition 'transcendental' that is occupied not so much with objects but rather with our mode of cognition of objects insofar as this is to be possible a priori.
Gist of Idea
'Transcendental' cognition concerns what can be known a priori of its mode
Source
Immanuel Kant (Critique of Pure Reason [1781], B025/A11)
Book Reference
Kant,Immanuel: 'Critique of Pure Reason', ed/tr. Guyer,P /Wood,A W [CUO 1998], p.149
A Reaction
Kant thinks this enquiry is a highly rational affair, but it sounds more like hopeful introspective psychology to me. If you find some prerequisites for an activity, how do you know there aren't others you have missed?
Related Idea
Idea 21441 'Transcendental' is not beyond experience, but a prerequisite of experience [Kant]