  Similarly, the fact that category mistakes embed felicitously in propositional attitude reports presents at least a challenge to the meaninglessness view: since ‘John said that the number two is green’, or ‘Jane dreamt that her toothbrush is pregnant’ are themselves felicitous reports, these reports are not (even by the lights of the meaninglessness view) meaningless. This leaves the question of whether it is possible that the report as a whole is meaningful, even though the embedded category mistake is not. Note that in the case of the syntactic approach, we were able to test how such embeddings behave using clear examples of syntactically ill-formed strings, ones which are not themselves category mistakes (e.g. ‘John said that rides boy the on’). In this case, however, matters are much trickier as we do not have any clear examples of grammatical but meaningless sentences that are not category mistakes which we can use to test the behavior of such embeddings. Nevertheless, more theoretical arguments concerning the semantics of attitude reports might bear on the question. For example, if we accept that the meaning of a sentence is composed out of the meaning of its constituents and that the relevant ‘that’-clause is a constituent of the  attitude  report,[15]  it follows that the attitude report as a whole cannot be meaningful  if its constituent category mistake is meaningless.