Full Idea
Kant maintains that we can only describe the a priori forms of knowledge (space and time, and the twelve categories), whereas Hegel insists that it is possible to deduce them.
Gist of Idea
Kant says we can describe the categories of thought, but Hegel claims to deduce them
Source
report of Immanuel Kant (Critique of Pure Reason [1781]) by Quentin Meillassoux - After Finitude; the necessity of contingency 2
Book Reference
Meillassoux: 'After Finitude: the necessity of contingency', ed/tr. Brassier,R [Bloomsbury 2008], p.38
A Reaction
I've some sympathy with Kant here. There is a sort of introspective philosophical psychology which seems to be possible, independently from empirical psychology.
Related Idea
Idea 15643 Nominal essence mistakenly gives equal weight to all underlying properties that produce appearances [Eagle]