 Suppose we are convinced, perhaps by arguments already given, that the teacher of Plato and Xenophon is not, by itself, a satisfactory specification of the meaning of “Socrates”. We might beat an orderly retreat, maintaining that it is still part of that meaning. Instead of being specifiable in a single succinct condition, the meaning of “Socrates” is constructed from a cluster of conditions, which includes, but is not exhausted by, the teacher of Plato and the teacher of Xenophon.