Daniel Speak

My dissertation is a systematic defense of the moral relevance of alternative possibilities. As such, it constitutes an attack on semi-compatibilism. ;To begin, then, I defend alternative possibilities against three related but independent lines of criticism. The most prominent of these is Harry Frankfurt's now famous counterexample strategy in which cases are constructed that purport to show that a person can, in fact, be responsible even when he cannot do otherwise. Another line of criticism is John Fischer's "flicker of freedom" argument, which builds on Frankfurt-type argumentation by challenging the "robustness" of alternative possibilities. Finally, some recent critics of alternative possibilities have developed "reasons-responsiveness" accounts of moral responsibility that seem further to invalidate the importance of the power to do otherwise. By extending traditional concerns and developing new objections, I argue that room remains for the possible relevance of an alternative possibilities condition on moral responsibility. ;I try to make a positive case for the plausibility of relevance by offering reasons to think that the ability to do otherwise plays an important role in our moral life. Alternatives are important, I argue, because giving up a "freedom to do otherwise" condition would put us in an epistemic bind with respect to our responsibility. That is, the kind of confidence we ordinarily have in our own moral responsibility would be unjustified if it turned out that we do not have alternatives. A second consideration in favor of the relevance of alternatives is distinctively moral. I explore and exploit the relationship between the ability to do otherwise and the putatively Kantian idea that "ought" implies "can," concluding that the semi-compatibilist must either reject both alternative possibilities and the Kantian thesis, or accept that people would not be blameworthy for their moral failures under determinism. Neither option is attractive. ;I conclude, then, that there is good reason to believe that alternative possibilities are necessary for moral responsibility and that semi-compatibilism should be rejected. Our intuitions about the importance of being able to do otherwise can still factor into the traditional arguments to the conclusion that moral responsibility is incompatible with causal determinism