The Apple of Kant's Ethics: i-Maxims as the Locus of Assessment

I want to distinguish between maxims at three levels of abstraction. At the first level are what I shall call individual maxims, or i-maxims: maxim tokens as adopted by particular rational beings. At the second level are abstract maxims, or a-maxims: abstract principles distinct from any individual who adopts them. At the third level are maxim kinds, or k-maxims: sets of various action-guiding principles that are grouped on the basis of their content. In this paper, I argue for the thesis that i-maxims are the locus of assessment in Kant's ethics.