 One question this defense raises is whether PAP, now construed as PAP-general, is subject to counterexamples similar to FSCs (Cohen &amp; Handfield 2007; Whittle 2010). Another is whether this revised principle reflects the kind of alternatives traditionally thought needed to explain responsibility (McKenna 1998; Kane 2002; Clarke 2009; Whittle 2010; Fischer 2018; cp. entry on  abilities §5.2).  There’s a set of moral practices, and with it a version of PAP, on which responsibility requires more than just the general ability to do otherwise. It’s apparently this reading of PAP that FSCs are targeting. Even if Frankfurt agents have the relevant general abilities, they seem to lack the ability to do otherwise in the sense traditionally—but wrongly, according to Frankfurt and his allies—required for responsibility.