This paper provides an opinionated guide to discussions of acting and believing on the basis of reasons. I aim to bring closer together largely separate literatures in practical rea- son and in epistemology. I focus on three questions. First, is basing causing? Causal theories of basing remain popular despite the notorious Problem of Deviant Causal Chains. Causal theorists in both the epistemic and practical domains have begun to appeal to dispositions to try and solve the problem. Second, how unified are (...) acting and believing on the basis of reasons? I consider an important challenge to their unity due to Setiya. I sketch a response, which posits unity of causal structure across acting and believing on the basis of reasons. Third, how does acting or believing on the basis of a good reason relate to acting or believing on the basis of a reason simpliciter? I generalize a recent argument of Lord and Sylvan's to include acting as well as believing. The conclusion is that, for both believing and acting, ϕing on the basis of a good reason does not amount to ϕing on the basis of a reason that just so happens to be good. (shrink)

Non-causal accounts of action explanation have long been criticized for lacking a positive thesis, relying primarily on negative arguments to undercut the standard Causal Theory of Action The Stanford Encyclopedia of Philosophy, 2016). Additionally, it is commonly thought that non-causal accounts fail to provide an answer to Donald Davidson’s challenge for theories of reasons explanations of actions. According to Davidson’s challenge, a plausible non-causal account of reasons explanations must provide a way of connecting an agent’s reasons, not only to what (...) she ought to do, but to what she actually does. That is, such explanations must be truth-apt, not mere rationalizations. My aim in this paper is to show how a non-causal account of action can provide explanations that are truth-apt and genuinely explanatory. To make this argument, I take as a given an account of the practical syllogism discussed by Michael Thompson and Eric Wiland, according to which the practical syllogism is truly practical rather than propositional in nature. Next, I present my primary positive thesis: reasons for actions have explanatory power in virtue of being parts of a structure—the practical syllogism—that contains the action being explained. I then argue that structural action explanations can meet Davidson’s challenge and that they genuinely explain actions. Finally, I conclude by addressing some objections to my argument. (shrink)