I defend a proposition-directed, sui generis account of agnosticism, according to which being agnostic about some proposition, P, involves a sceptical or questioning mental stance towards both the truth and falsity of P. Call this the questioning-attitude account. The questioning-attitude account contrasts with the question-directed attitude account of Jane Friedman, which holds that the object of agnosticism is a question rather than a proposition. I argue that the questioning-attitude account not only avoids a major weakness of Friedman’s question-directed attitude account, (...) but it also displays the following three attractive features: (1) it offers an explanation of why ascriptions of agnosticism often take an interrogative compliment, (2) it offers a univocal account of the content of all three doxastic attitudes, and (3) it fleshes out the claim that agnosticism is sui generis by describing what makes agnosticism distinct from both belief and disbelief. (shrink)