  In comparison with normal linguistic interaction, signaling problems are very specialized. A fundamental difference is that people normally need not agree upon which action(s) would be desirable, given some state of affairs. When we search for an audience reaction canonically associated with an assertion that \(p\), the most natural candidate is something like believing that \(p\) (or perhaps believing that the speaker believes \(p)\). Yet coming to believe a proposition is not an action, and Lewis’s definition of convention presupposes that conventions are regularities of action. Hence, believing what people say cannot be part of a Lewisian convention.