 Arguably, a Lewisian convention is not normative; it does, for instance, not seem to require any prescription to conform being in force in the community. Yet another question concerns the requirement of regularity. Even if regularity of use were required for meaning (Davidson famously disputed this; cf. Davidson 1984a; 1986b), such regularity might not need to be due to either norm or convention. A relevant observation here is that people, upon reflection, usually can provide at least rough formulations of the rules or conventions they are following and cite them as reasons for their actions. But when it comes to the semantic rules of natural language, this is far from being the case; the question would be why.