 What is the relationship between the prima facie responsibilities we have and the ‘actual or absolute duty to do one particular act in particular circumstances’ (RG 28)?  Our self-evident prima facie responsibilities are not ‘principles by the immediate application of which our duty in particular circumstances can be deduced’ (FE 84; also 169, 171; OJ 122, 127). Instead, one determines one’s actual duty or one’s duty proper, by reference to ‘all the morally significant kinds it [the act] is an instance of’ (RG 20; italics in original; also FE 84, 186; OJ 126–127). One’s actual responsibility or duty ‘belongs to an act in virtue of its whole nature and of nothing less than this’ (RG 28; also 33, 132).