 This remark has usually been interpreted as a demand that, for the sign ‘S’ to have been given a meaning, it must always figure thereafter (if used affirmatively and sincerely) as a true statement: that is, I must use the sign ‘S’ affirmatively only when I really do have the sensation S. And it has usually been thought that the subsequent argument concerns the adequacy of memory to ensure that I do not later misidentify my sensations and call a different kind of sensation ‘S’ in the future. This account of the argument and its history is summed up by Anthony Kenny as follows: