 One final note on responsibility: In the literature one sometimes finds the notion of true or ultimate moral responsibility (Klein 1990; G. Strawson 1994; Kane 1996). It’s not always clear how this is related to what PAP calls, simply, moral responsibility (M. Bernstein 2005; Boxer 2013). On one reading, ultimacy is an additional condition on ordinary responsibility to be listed alongside epistemic and other requirements alluded to earlier. On the other hand, if talk of ultimacy is intended to signal a higher grade of responsibility, there will be a corresponding version of our principle to be evaluated on its own terms: