In Russ Shafer-Landau’s text, he discusses Ethical Objectivism, revealing that moral ethics are true simply by definition. He also addresses objections to Ethical Objectivism, one of which is J.L. Mackie’s Error Theory. The Error Theory maintains that since there are so many disagreements about ethics, there is no way to prove that moral ethics are true, and thus moral ethics cannot simply be true by definition as Shafer-Landau and his Ethical Objectivism theory claims they are. Mackie agrees with Objectivists about the “normativity” of ethics, however, he is adamant that there are no moral truths, and to support this claim, he uses the Argument from Relativity and the Argument from Strangeness. The aforementioned claim about the lack of proof
