In two recent articles I offered a solution to an old problem in Kant's account of the categorical imperative, that of finding a unitary interpretation of all four of the Groundwork's applications of the Formula of the Law of Nature (FLN). In this article I bring out the unity of this solution and defend the principle of suitability interpretation of FLN from objections raised by Samuel Kahn.
James Furner, PhD, is a lecturer in philosophy at the Independent Institute of Education, MSA campus, and also an Honorary Research Associate of the SARChI/Newton SA-UK Bilateral Chair in Political Theory, University of the Witwatersrand. His first book, Marx on Capitalism: The Interaction-Recognition-Antinomy Thesis (2018), is published by Brill Press. E-mail: jpfurner@hotmail.com