 If an argument for moral error theory has two steps—the conceptual and the ontological—then there are two places to object. If we consider Mackie’s argument, for example, then one kind of opponent will agree that objective values and prescriptions would be too weird to countenance, but maintain that it doesn’t matter because moral discourse is not committed to the existence of such strange creatures. Another kind of opponent will agree with Mackie that morality is committed to the existence of objective values and prescriptions, but maintain that there is nothing particularly strange about them.