From Partially Examined Life episode 348, “Tim Williamson’s Knowledge-First Epistemology” (Part One, Part Two). See Williamson, “Knowledge First Epistemology,” in The Routledge Companion to Epistemology; Kuhn’s “normal science” from The Structure of Scientific Revolutions as a project in knowledge-first puzzles; and general concepts of epistemic normativity and radical externalism in epistemology.