 While the examples from Plato and Sartre are the ones most commonly cited, there are many others. Literature abounds with such cases. In Aeschylus’s Agamemnon, the protagonist ought to save his daughter and ought to lead the Greek troops to Troy; he ought to do each but he cannot do both. And Antigone, in Sophocles’s play of the same name, ought to arrange for the burial of her brother, Polyneices, and ought to obey the pronouncements of the city’s ruler, Creon; she can do each of these things, but not both. Areas of applied ethics, such as biomedical ethics, business ethics, and legal ethics, are also replete with such cases.