/nooh"meuh non'/, n., pl. noumena /-neuh/.1. the object, itself inaccessible to experience, to which a phenomenon is referred for the basis or cause of its sense content.2. a thing in itself, as distinguished from a phenomenon or thing as it appears.3. Kantianism. something that can be the object only of a purely intellectual, nonsensuous intuition.[1790-1800; < Gk nooúmenon a thing being perceived, n. use of neut. of prp. passive of noeîn to perceive; akin to NOUS]
* * *plural Noumena,in the philosophy of Immanuel Kant (Kant, Immanuel), the thing-in-itself (das Ding an sich) as opposed to what Kant called the phenomenon—the thing as it appears to an observer. Though the noumenal holds the contents of the intelligible world, Kant claimed that man's speculative reason can only know phenomena and can never penetrate to the noumenon. Man, however, is not altogether excluded from the noumenal because practical reason—i.e., the capacity for acting as a moral agent—makes no sense unless a noumenal world is postulated in which freedom, God, and immortality abide.The relationship of noumenon to phenomenon in Kant's philosophy has engaged philosophers for nearly two centuries, and some have judged his passages on these topics to be irreconcilable. Kant's immediate successors in German Idealism in fact rejected the noumenal as having no existence for man's intelligence. Kant, however, felt that he had precluded this rejection by his refutation of Idealism, and he persisted in defending the absolute reality of the noumenal, arguing that the phenomenal world is an expression of power and that the source from which this power comes can only be the noumenal world beyond.
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