Socrates asks Euthyphro whether the gods value piety because it is good, or if piety is good because the gods value it. If we generalize Socrates’s question, we come to a choice that has exercised tremendous influence in the history of metaphysics. Instead of asking about value, we can talk about any property. Instead of asking about valuing, we can ask about any attitude or activity. Instead of talking just about the gods, we can talk about any class of individuals. If we make all these generalizations we get the following pair of questions.