We are bombarded with epistemic norms. Respect your evidence. Don’t believe in contradictions. Don’t arbitrarily change beliefs. But how do such norms get their normative force? Why should we respect our evidence, for example? In this paper I offer a familiar type of answer, epistemic instrumentalism. Epistemic instrumentalism holds that epistemic norms get their normative force by being useful. You should respect your evidence because it will help you achieve some valuable ends. This answer, while familiar, is not very popular. (...) There is a widely accepted objection to epistemic instrumentalism, the too few reasons objection. The objection looms so large that standard developments of instrumentalism have become bloated with philosophical machinery to respond to it. This does a disservice to epistemic instrumentalism. Rather than focusing completely on the objection, I focus on describing a simple model for how conforming to the epistemic norms is broadly useful. Once I describe the simple model, the too few reasons objection becomes much easier to answer. This strategy results in a well-motivated philosophical theory based on uncontroversial facts that has many advantages over rival theories. (shrink)

Beliefs should conform to some norms. Epistemic instrumentalism holds that your beliefs should conform to these epistemic norms just because conforming is useful. But there seems to be cases where conforming to the epistemic norms isn’t useful at all, as in so-called “too-few-reasons” cases. In response to these cases, universal epistemic instrumentalists argue that despite first appearances, it is always useful to conform to the epistemic norms. I argue that all current versions of this universalist response are objectionable. I conclude (...) with a conjecture about why no version of universalism will succeed. (shrink)

Douglas Walton’s multitudinous contributions to the study of argumentation seldom, if ever, directly engage with argumentation in mathematics. Nonetheless, several of the innovations with which he is most closely associated lend themselves to improving our understanding of mathematical arguments. I concentrate on two such innovations: dialogue types (§1) and argumentation schemes (§2). I argue that both devices are much more applicable to mathematical reasoning than may be commonly supposed.