"categorically" . . "perfect duties" . . . "Categorical imperative" . "universal moral truths" . . "Kantian assumption" . . . . . "Kantian notion of duty" . "Categorical imperative" . "Kant" . "Kant's Categorical Imperative" . "theory" . . . "first formulation" . "one is treated as an end always and never as a means" . "confused with the Golden Rule." . . . "Categorical" . "Kant\u2019s categorical imperative" . "Categorical imperatives" . . "logically consistent ethical rule" . . "categorical freedom" . . "ethics" . . "practice" . "imperfect duties" . "categorical" . "Categorical_imperative#Lying_to_a_murderer" . "Categorical Imperative" . . "concept of duty" . . . "categorical imperative" .