The sequence of antagonistic "'revolutions" and counter-revolutions' between Keynesian and Classical Economics was in the end quite sterile. Fostering a dialogical conception of economics argument, we reconstruct the Pigouvian analytical "node" and the debate unfolding between Keynes and Pigou. The Cambridge "Keynesians" Joan Robinson and Richard Kahn broke that fledging dialogue and ungracefully abandoned a number of Keynes'--and also some of their own--central conceptions. Re-thinking this dialogue leads to new analytical paradigms and perspectives.