Anyone who has taught an introductory ethics course or a professional ethics class has likely heard students writing off ethics and ethics instruction as unimportant, offering as evidence some type of moral relativism. Even if the instructor is sympathetic towards a particular version of moral relativism, students’ relativist claims can be disconcerting and can seriously detract from their will...

Epicurean epistemology is infamous for the claim that all sense-perceptions are true. 1 This is how Lucretius puts it: what is perceived by any of the senses at any given time is true ( De Rerum Natura [ DRN ] 4.499). This claim—which I shall call SPT—seems deeply misguided. It appears obvious that sense-perception can err. The plan for this chapter is to show that SPT is a sophisticated philos...