The first person singular is the nucleus on which all the other referential devices depend… The final point of reference, by which a statement is attached to reality, is the speaker's reference to himself, as one thing and one person among others… The world is always open to conceptual re-arrangement. But the re-arrangement is only the addition of new tiers of discrimination to a foundation that remains constant: the recognition of persisting things singled out by active observers who have a statable standpoint as objects among other objects. It is in judgments of perception that the notion of identity, and principles of individuation, are given their earliest sense. That beings, who are capable of action and observation, are born into, and move among, a world of persisting objects is a logical necessity and not a contingent matter of fact. (Stuart Hampshire, Thought and Action, London: Chatto and Windus, 1959, pp. 40, 87).