Abstract

Epistemic impermissivism is the view that there is never more than one doxastic attitude it is rational to have in response to one's total evidence. Epistemic permissivism is the denial of this claim. The debate between the permissivist and the impermissivist has proceeded, in large part, by way of 'negative' arguments that highlight the unattractiveness of the opposing position. In light of the deadlock that has ensued, this paper has two aims. The first is to introduce the concept of a 'positive' argument for impermissivism. The second is to show that this argument faces a dilemma, one that generalizes the problems that famously arise for formal constraints like the Principle of Indifference. The aim of this paper is to strengthen the argument against the impermissivist by showing that no positive argument for impermissivism is likely to succeed.