Although the contemporary metaethics literature contains many references to (and discussions of) the late J.L. Mackie’s arguments against moral realism, I’ve never seen anyone formally analyze its logical structure. (If I’m mistaken and someone has done that, please provide a citation in the combox.) The goal of this post is to try to take first … What *Is* the Logical Structure of Mackie’s Anti-Moral Realism Argument?