Abstract

The life story of Kant’s student F. A. Hahnrieder (1765/6–1829) provides us with new examples of the application of the categorical imperative. Kant has given his opinion about that. The biography of Hahnrieder suggests that Kant has not always insisted on the uniqueness of the interpretation of the categorical imperative. He has also admitted other, “paradoxical”, “unusual”, but not “fantastic” interpretations. Kant has even respected a radical interpretation of the categorical imperative. On the base of the archive data, numerous mistakes about Hahnrieder were corrected in biographies of Kant and in the Akademie-Ausgabe.