Kant

A person, Kant tells us, is crooked timber from which no straight thing can be made.

There has never been so concise and definitive a debunking of Kant's categorical imperative.

Kant has expounded his argument, and discussed its bearings fully and minutely, in his 'Kritik der Urtheilskraft,' sec.

Hence it was easy for Kant to show that our science is wholly relative and our metaphysics entirely artificial.