of sense knowledge arises; and to arrest our attention on those veils and lenses and say they are all we know, belies the facts of the case and is hardly honest. If we could really do that, we should be retracting the first act of intelligence and becoming artificial idiots. Yet this sophistication is the first principle of German philosophy (borrowed, indeed, from non-Germans), and is the thesis supposed to be proved in Kant’s Critique of Pure Reason.