The document outlines two types of egoism: psychological egoism, which claims we always act in self-interest even if unconsciously, and ethical egoism, which claims we should always act in self-interest. It notes that using psychological egoism to argue for ethical egoism commits a logical fallacy, as it does not follow that something we do we should do. It also discusses arguments for and against ethical egoism, and poses questions about whether we should consider self-interest or others' interests in our actions.