If the relevant capacity is the idealized ability to reflect rationally in a full sense, then ordinary everyday reflection does not meet the threshold.

The move that must be made here, I think, picks up on Korsgaard’s gloss on Kantianism and the argument that our reflective capacities ultimately ground our obligations to others and, in turn, others’ obligations to regard us as moral equals. Arneson argues, however, that people surely vary in this capacity as well — the ability to reflectively consider options and choose sensibly from among them. Recall what we said above concerning the ambiguities of Korsgaard’s account concerning the degree to