⁵ It is this observation, unwittingly underscored by Hume (for Kant, the Moses who brought us to within sight of the Promised Land he himself was destined not to enter), that motivates Kant to wheel in his heavy transcendental machinery. For Kant sought to explain the modal commitments implicit in the application of ordinary empirical concepts by placing the modal concepts of law and necessity in the newly postulated realm of pure concepts or categories, which must be graspable a priori precisely in the sense that their applicability is presupposed by the applicability of any empirical concepts. The concept of vocabularies that are “universally LX,” introduced below, is a successor notion along at least one important dimension.