Another word for unrealizable

But there are gaps in Kant's system - a imperfect gap between sensation and the sense-forms of time and space; a gap between sense-forms and thought; a gap between the lower but practicable processes of the Understanding and the higher but unrealizable ideas of Reason.

A thing-in-itself which is not a thing to some consciousness is an entirely unrealizable, because self-contradictory, conception.

Cousin Relations was opposed to Kant in asserting that the uncondi- to Kant, tioned in the form of infinite or absolute cause is but Schelling a mere unrealizable tentative or effort on the part of and Hegel.