 The claim that  (KNA)  is supported by these conversational patterns has been extensively criticized. The most common line is that the available data can be explained equally well (if not better) by competing accounts. For instance, several authors argue that the oddity of Moorean Assertions and Lottery Assertions can be explained by appeal to a justification  norm.[21]  Others have noted that these conversational patterns may be explained by appealing to more general principles, rather than assertoric norms specifically. For instance, it has been argued that Lottery Assertions and Moorean Assertions are improper because they violate more general (Gricean) conversational  principles.[22]