Lecture 8/8. Reason, properly disciplined, draws permissible inferences from the resulting concepts of the understanding. The outcome is knowledge.
When rightly employed, the perceptual and cognitive powers match up the right way with the real world and ground the knowledge-claims of the developed sciences. However, there is a strong tendency to stretch these processes beyond the permissible boundaries and seek what Kant refers to as "transcendental ideas" that go beyond the realm of actual or possible experience.