Pure practical reason (German: reine praktische Vernunft) is reasoning that deals with what ought to be; namely, what actions we ought to do, appearing in Immanuel Kant's Critique of Practical Reason and Groundwork of the Metaphysics of Morals. Being the opposite of impure (or sensibly-determined) practical reason, it is the reason that drives actions without any sense-dependent incentives.
Pure practical reason (German: reine praktische Vernunft) is reasoning that deals with what ought to be; namely, what actions we ought to do, appearing in Immanuel Kant's Critique of Practical Reason and Groundwork of the Metaphysics of Morals. Being the opposite of impure (or sensibly-determined) practical reason, it is the reason that drives actions without any sense-dependent incentives.
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