For 10 points, name this faculty whose "pure" form was critiqued by Kant.
Nikolas Kompridis introduced the idea of reflective disclosure to critique Habermas' formulation of this concept. In the first volume of Theory of Communicative Action, Habermas claims that this concept has been subjugated to the use of formal systems that objectify individuals. He then aims to establish a "communicative" understanding of this concept. In a book partially titled for this concept, Horkheimer discussed the limitations of American pragmatism and described how the Nazis were able to push their agenda onto Germany. That book defines the (*) instrumental variety of this concept. An essay by Kant outlines "public" and "private" uses of this concept and claims that freedom is the ability to publicly exercise this faculty. Hume stated that this concept is the slave of the passions, and a book titled after a form of this concept argues for the existence of synthetic a priori truths. For 10 points, name this faculty whose "pure" form was critiqued by Kant.
Nikolas Kompridis introduced the idea of reflective disclosure to critique Habermas' formulation of this concept.
reason [accept "rationality" or more specific forms like "pure reason" or "communicative reason"]