Among challenges to libertarians, the _Mind_ Argument has loomed large. Believing that this challenge cannot be met, Peter van Inwagen, a libertarian, concludes that free will is a mystery. Recently, the _Mind_ Argument has drawn a number of criticisms. Here I seek to add to its woes. Quite apart from its other problems, I argue, the _Mind_ Argument does a poor job of isolating the important concern for libertarians that it raises. Once this concern has been clarified, however, another argument (...) serves to renew the challenge. The Assimilation Argument challenges libertarians to explain how ostensible exercises of free will are relevantly different from other causally undetermined outcomes, outcomes that nobody would count as exercises of free will. In particular, libertarians must explain how agents can have the power to settle which of two causally possible futures becomes the actual future. This will require them to distinguish cases where this power is supposedly present from similar cases where it’s clearly absent. (shrink)

The Luck Argument is among the most influential objections to the main brand of libertarianism about metaphysical freedom and moral responsibility. In his work, Alfred Mele [2006. Free will and luck . Oxford: Oxford University Press] develops - and then attempts to defeat - the literature's most promising version of the Luck Argument. After explaining Mele's version of the Luck Argument, I present two objections to his novel reply to the argument. I argue for the following two claims: (1) Mele's (...) reply is either otiose or undermined by his own defense of the Luck Argument from a different objection and (2) Mele's reply turns out to lack the form required to engage the step of the Luck Argument it targets. Having shown that the failure of Mele's novel attack is overdetermined, I close by defending a different (and, I believe, decisive) objection to the Luck Argument - which, as it happens, lurks right under Mele's nose. (shrink)