 However, to investigate the possibility of the imagined diary case by exploring it from the inside (the only way, he thinks, really to expose the confusions involved) requires him to use certain words when it is just the right to use these words which is in question. Thus he is forced to mention in §258 examples like ostensive definition, concentrating the attention, speaking, writing, remembering, believing and so on, in the very process of suggesting that none of these can really occur in the situation under consideration (§261).