“I was involved in three long-running arguments over the course of my career. The first was with the Althusserians, on Marx’s theory of history, and I knew what that was about. The second was with Nozick, on self-ownership, and I knew what that was about. The third was with Dworkin, on expensive tastes, and I still have no idea what that was about.”
(Imperfect paraphrase from memory of conversation a few years ago.)