Robert Nozick's 1974 experience machine asks whether a life of perfectly simulated bliss, while your body floats in a vat, is actually a good life. This episode uses that puzzle to introduce eudaimonia, the ancient Greek goal that translators have long rendered as happiness even though Aristotle meant an objective assessment of a whole life rather than a feeling. The hosts unpack the word's roots, the evil children thought experiment that shows why contentment based on falsehood does not count, and arete as excellence in function, from the sharpness of a knife to the defining excellence of a human being.

The episode then follows the debate across the schools: Socrates and Plato arguing virtue is sufficient and that the tyrant with Gyges' ring is a slave to his appetites, Aristotle insisting external goods and luck also matter, Epicurus trea ...