Full Idea
Reason has logical and transcendental faculties.
Gist of Idea
Reason has logical and transcendental faculties
Source
Immanuel Kant (Critique of Pure Reason [1781], B355/A299)
Book Reference
Kant,Immanuel: 'Critique of Pure Reason', ed/tr. Guyer,P /Wood,A W [CUO 1998], p.387
A Reaction
The notion of a transcendental faculty is not entirely clear (despite all Kant's efforts), but it is certainly vital to grasp that rationality extends way beyond logic. The clearest example is induction, which is rational, despite its shortage of logic.
Related Idea
Idea 11951 Hume allows interpolation, even though it and extrapolation are not actually valid [Molnar]