  This sentence seems just as infelicitous as its non-negated counterpart, and yet it is not trivially false (if anything, it seems trivially true). This is not yet a serious problem for the Gricean account of category mistakes. The account can be easily extended to address this example as well: according to Grice’s maxim of quantity, one should make their contribution as informative as required. But trivially true sentences (such as, it is claimed, (24)) are clearly not informative, thus violating the maxim of quantity. There are trickier cases, however, ones of category mistakes that are neither trivially true nor trivially false. Consider for example the following: