 The opposition between continuity and discreteness plays a significant role in the philosophical thought of Immanuel Kant (1724–1804). His mature philosophy, transcendental idealism, rests on the division of reality into two realms. The first, the phenomenal realm, consists of appearances or objects of possible experience, configured by the forms of sensibility and the epistemic categories. The second, the noumenal realm, consists of “entities of the understanding to which no objects of experience can ever correspond” (Körner 1955: 94), that is, things-in-themselves.