Claims about agents’ abilities—practical abilities—are common in theliterature on free will, moral responsibility, moral obligation, personalautonomy, weakness of will, and related topics. These claims typicallyignore differences among various kinds or levels of practical ability. Inthis article, using ‘A’ as an action variable, I distinguish among threekinds or levels: simple ability toA; ability toAintentionally; and a morereliable kind of ability toAassociated with promising toA. I believe thatattention to them will foster progress on the topics I mentioned. Substan-tiating that belief—by making progress (...) on these topics in light of suchattention—is a project for other occasions. My aim here is to lay a partialfoundation for that project. (shrink)

Peter van Inwagen’s original formulation of the Consequence Argument employed an inference rule that was shown to be invalid given van Inwagen’s interpretation of the modal operators in the Consequence Argument. In response, van Inwagen recently suggested a revised interpretation of his modal operators. Following up on a debate between Blum and Schnieder, I analyze van Inwagen’s revised interpretation in terms of explanatory notions and I argue that van Inwagen faces a dilemma: he either has to admit that beta entails (...) fatalism, or he has to admit that a new counterexample invalidates beta. Either way, it seems reasonable to reject beta and to conclude that the Consequence Argument fails. Further, I argue that Widerker’s well-known substitute for rule beta is faced with a similar dilemma and, therefore, is bound to fail as well. I conclude that, if the modal operators are interpreted in terms of explanatory notions, neither van Inwagen’s nor Widerker’s rule of inference turns out to be valid. (shrink)