<p>Some philosophers argue that knowledge is the norm of belief. They typically have in mind “norms” that specify what one ought to do as a matter of normative fact, in a way that’s independent of whether anyone actually conforms to these norms or expects others to do so. This paper explores a different sense in which knowledge could be a norm for belief. Under this sociological, descriptive sense, “norms” constitutively depend on what we in fact expect of each other, and the standards by which we evaluate and criticize each other’s activities. Since which social norms we enforce is to some degree a contingent, voluntary matter, it makes sense to ask whether there’s practical utility in adopting knowledge as a social norm for belief. We argue that enforcing such knowledge norms for belief would be more practically useful than two of the main alternative social norms we could enforce instead.</p>