Part III found order without a master plan. This part looks for knowledge without a master method. Every argument has to stop somewhere: ask for the proof of the proof and you end in a regress, a circle or an axiom taken on trust. These pages stop short of proof on purpose, because a claim no one can test is a claim no one can correct.
How the claims are held. Logic as a tool for finding mistakes rather than proving truths. Why no method gets to rule, and why no test ever hits a single claim. And why the free-market quarrel between Mises and Friedman, and the attempt to get an ethic out of economics, turn on the same question.
What the moral words do. Happiness, selfishness, objective and free, and how a word that slides between meanings wins arguments it shouldn’t. Then the ground under the rest of the book: agency as the best reason for respect anyone has found. It’s offered as a reason, not a proof, because a reason is something you offer a person, and a proof is something you enforce.
Chapters
17. Method Without Foundations
18. What Moral Words Do