Philosophers like A.J. Ayer and Charles Stevenson argued that at least a major function of ethical language is for speakers to express emotions, not for speakers to express beliefs about the world. In this episode, I discuss Ayer's pure emotivism, his arguments for this metaethical view, and then I discuss Stevenson's attempts at improving Ayer's view. I call Stevenson's view an impure version of emotivism.