Active Forgetfulness, Genealogy, Groundwork

The process of "active forgetfulness", that Nietzsche introduces in II, 1, of the Genealogy of Morals, suggests flaws in both his concept of a 'genealogy of Morals' and Kant's concept of a 'groundwork of a metaphysics of Morals'.  As a transition that cannot be reduced to antecedent conditions, the symbol that is appropriate to Active Forgetfulness, in Nietzsche's imagery of a succession of generations, is one that he does not entertain--Adoption.  Similarly, his image of "fruit" to characterize "the sovereign individual . . . liberated again from the morality of custom" (GM, II, 2), is inappropriate, because a fruit simply drops from a tree when ripe, whereas the "forgetfulness" that the image means to represent is an "active" process, in his own words.  In contrast, a 'groundwork' is, indeed, an active process.  But, if so, then so, too, is a 'groundwork of a metaphysics'.  In other words, the concept of Active Forgetfulness also helps expose 'Metaphysics' as a product of human construction in Kant's system, thereby debunking any reclamation of 'super-natural' privileges for it achieved by its relocation to the realm of Pure Practical Reason.