Berislav Marušić

The ethics of belief is concerned with the question what we should believe. According to evidentialism, one should believe something if and only if one has adequate evidence for what one believes. According to classic pragmatism, other features besides evidence, such as practical reasons, can make it the case that one should believe something. According to a new kind of pragmatism, some epistemic notions may depend on one’s practical interests, even if what one should believe is independent of one’s practical reasons. In this paper I recount and briefly assess the debate between evidentialism and pragmatism.

We often promise to ϕ despite having evidence that there is a significant chance that we won’t ϕ. This gives rise to a pressing philosophical problem: Are we irresponsible in making such promises since, it seems, we are insincere or irrational in making them? I argue that we needn’t be. When it’s up to us to ϕ, our practical reasons for ϕ-ing partly determine whether it is rational for us to believe that we will ϕ. That is why we can sometimes rationally believe that we will ϕ even if our belief goes against the evidence.