 In doing this, the faculty does not violate any of the standards Kant sets out within Transcendental Idealism, for reason is merely applying the formal principle of complete determination to all possible predicates and constructing an idea (or more precisely, an ideal) thereby. This construction can then be entertained by the intellect, or perhaps, used as a regulative principle, as one does with other less grand ideals. Transcendental error comes in, however, if reason also then tenders the ens realissimum as not merely a formal construct but as the metaphysical ground of all that is: since it (in principle) contains all determinations, and these determinations are of actual entities, a “transcendental subreption” may occur that transforms the ens realissimum from just an intellectual construct into a metaphysical reality as the sum total of all actuality.