Double-Checking: In Speech and in Private

Abstract Can we rationally double-check something we already know? Those who say “no” endorse the Ignorance Norm, which states that we should not ask a question whose answer we already know, thereby classifying double-checking as improper. Those who say “yes” reject the Ignorance Norm, instead proposing a broader norm that accommodates double-checking. I argue that both positions are unsatisfactory. Instead, I propose a novel solution that offers two key advantages over existing accounts. First, it preserves the Ignorance Norm. Second, it treats double-checking as a proper form of asking questions. The proposed solution draws on insights from speech act theory, arguing for a distinction between the default way of asking questions – governed by the Ignorance Norm – and the practice of double-checking which is subject to a stronger norm. While in default contexts we ask questions to acquire knowledge, in cases of double-checking we seek further epistemic goods, such as certainty or second-order knowledge.