I focus on a key argument for global external world scepticism resting on the underdetermination thesis: the argument according to which we cannot know any proposition about our physical environment because sense evidence for it equally justifies some sceptical alternative (e.g. the Cartesian demon conjecture). I contend that the underdetermination argument can go through only if the controversial thesis that conceivability is per se a source of evidence for metaphysical possibility is true. I also suggest a reason to doubt that (...) conceivability is per se a source of evidence for metaphysical possibility, and thus to doubt the underdetermination argument. (shrink)

Our aim in this paper is to put the concept of moral responsibility under a microscope. At the lowest level of magnification, it appears unified. But Gary Watson has taught us that if we zoom in, we will find that moral responsibility has two faces: attributability and accountability. Or, to describe the two faces in different terms, there is a difference between being responsible and holding responsible. It is one thing to talk about the connection the agent has with her (...) action; it is quite another to talk about the potential interaction the agent might have with her moral community. It turns out, though, that the faces of moral responsibility can themselves be viewed under an even higher level of magnification. If moral responsibility has two faces, then our aim in this paper is to examine their features. To do so reveals subtle distinctions in our concept of moral responsibility and its interaction with surrounding issues that, we argue, can help illuminate various debates in the literature. (shrink)

: It is generally accepted that skeptical scenarios must be possible to raise legitimate skeptical doubt. I argue that if the possibility in question is supposed to be genuine metaphysical possibility, the skeptic's reasoning does not straightforwardly succeed. I first motivate the metaphysical possibility requirement on skeptical scenarios : it's a plausible position that several authors accept and that a family of prominent views—sensitivity, safety, relevant alternatives—are committed to. I argue that plausible constraints in modal epistemology show that justification for (...) believing that certain global skeptical scenarios are metaphysically possible rests on some justified beliefs about the external world, and that this undermines the skeptical argument. While there may still be local skeptical challenges, skeptics cannot appeal to the metaphysical possibility of skeptical scenarios to generate global external world skepticism. (shrink)