 Some philosophers have argued that certainty is the norm of assertion: one can assert that p just in case one is certain that p (Stanley 2008; Peterson 2019; Beddor 2020b). The norm is often defended by adapting Moore’s paradox to certainty (Moore 1942). According to the original form of the paradox, there is something infelicitous about assertions like, “It’s raining, but I don’t believe it is.” Defenders of the certainty norm of assertion argue that assertions like, “Dogs bark, but I’m not certain that they do,” are just as odd (Stanley 2008, p. 47). The explanation of this infelicity is then provided by the fact that certainty is the norm of assertion. When the speaker asserts, “Dogs bark,” but then goes on to deny being certain of that claim, she has undermined her own assertion, contradicting in practice what she has just said.