What is Wrong with Agnostic Belief?

One who thinks that our foreseeable sources of evidence could not indicate whether something is true is a sort of agnostic about that thing. If one also believes that thing, one has an ‘agnostic belief’. This chapter argues that not all agnostic beliefs must be irrational. Three reasons for thinking that all agnostic beliefs are irrational are considered: agnostic beliefs are always unjustified, always involve a sort of akrasia or incoherence, or always commit one to absurd ‘Moore-paradoxical’ judgements. But, none of these reasons pan out. So, some agnostic belief might fail to be irrational. However, such an agnostic belief, if it is to be defensible, must have some interesting features, which are discussed in the conclusion.