 We need to proceed cautiously here. No one doubts that what we ought to do depends on how things are non-morally. For example, the moral claim that a given man deserves to be punished presupposes the non-moral fact that he committed the crime. It should come as no surprise, then, that experimental evidence might be relevant in this way to morality. Whether experimental evidence is relevant to discovering the fundamental moral principles—those meant to be put into action one way or another depending on how the world is non-morally—is still subject to debate.