Abstract

Most contemporary theories of action maintain that there are basic actions. A basic action is something that one does intentionally without doing anything else intentionally as means to that end. Most contemporary theories of action also maintain that there are non-basic actions that are mistakes in performance, where a mistake in performance is a case of mucking up what one meant to do, without the failure being the result of prevention or abnormal interference. But most contemporary theories of action deny that there are basic mistakes in performance: stretches of activity that would be basic actions were they to succeed, but are in fact mistakes in performance. I argue that we have reason to think that there are basic mistakes in performance, and if there are, then we must give up a key commitment common to much contemporary action theory. The commitment is that every particular imperfect expression of the will is grounded in some particular perfect expression of the will. Giving up this commitment has important metaphysical consequences for how we think of the will as a power of agency, and implies that causal deviance perhaps isn’t the main problem that causal theorists of action ought to worry about.