Note the distant background voice is intentional for potential humour, as in sort of an intellectual heckler. Of course I could have moved closer to the microphone.
BLACKBURN, SIMON (1996) Oxford Dictionary of Philosophy, Oxford, Oxford University Press.
LANGER, SUSANNE K (1953)(1967) An Introduction to Symbolic Logic, Dover Publications, New York. (Philosophy).
PIRIE, MADSEN (2006)(2015) How To Win Every Argument, Bloomsbury, London.