 It should be noted, however, that even if (18b) is redundant, it is arguably a felicitous discourse, and therefore some subtlety is needed in applying van der Sandt’s cancellation principle in the simplified form above. The issue is not simply whether a discourse is felicitous, but whether there is any clash with the maxims. And this will of course depend on how exactly the maxims are formulated. But for the purposes of understanding the intention of van der Sandt’s analysis, we can take it that though an utterance of (18b) could be felicitous, it would be a case of flouting (in Grice’s sense), a case where a maxim is disobeyed in order to preserve some greater conversational goal.