Groundwork | Morals and Dogma of the Ancient and Accepted Scottish Rite of Freemasonry | Groundwork UK | Libertarianism (metaphysics) | Review of Metaphysics | Popular Metaphysics | ''Metaphysics'' | Lila: An Inquiry into Morals | Aristotle's Metaphysics | Animals, Men and Morals | Achit (metaphysics) |
Pure practical reason is the opposite to impure (or sensibly-determined) practical reason and appears in Immanuel Kant's Groundwork of the Metaphysics of Morals.