  Second, what sorts of individuals does the name pick out, and what features do those individuals share? Readers of the Socratic dialogues will recall that when Socrates asks his “What is X?” question (e.g., “What is piety?” “What is courage?” “What is knowledge?”), the respondent frequently opens with some sort of list. Euthyphro, when asked what piety is, says: “I say that piety is doing what I’m doing right now, prosecuting the wrongdoer, be it about murder or temple robbery or anything else, whether the wrongdoer is your father or your mother or anyone else” (Euthyphro 5d–e). Theaetetus, when asked what knowledge is, first replies: “I think the things someone might learn from Theodorus are knowledge—geometry and the things you enumerated just now [arithmetic, astronomy, music]—and cobbling, too, and the arts (technai) of the other craftsmen; all of them together and each separately are simply knowledge” (Theaetetus 146c–d). Socrates regularly objects that the interlocutor has merely given him a list, whereas he wants to know what all the items on the list have in common and what makes them all instances of one kind. Although he complains about the list, it helps to orient the investigation, because reflection on the list equips the inquirers to see the common features shared by all the items enumerated.