Paul's treatment of marketing brought to mind Gladwell's What We Can Learn From Spaghetti Sauce: http://www.ted.com/index.php/talks/view/id/20. The Ockhamist dialectic -- "If we are going to be honest, then we must admit the possibility that everything we know and believe is, in fact, incorrect" -- evokes existentialists e.g. Eckhart Tolle: "The greatest achievement of humanity is not its works of art, science, or technology, but the recognition of its own dysfunction, its own madness."