1. Rips, Lance J., The Psychology of Proof: Deductive Reasoning in Human Thinking, Cambridge, Mass.: MIT Press, 1994
2. Priest, Graham, and Routley, Richard, “Applications of Paraconsistent Logic,” in Graham Priest, Richard Routley, and Jean Norman (eds.) Paraconsistent Logic: Essays on the Inconsistent, München: Philosophia Verlag, 1989, 367–93
3. The Nature of Judgement;Moore;Mind,1898
4. How Bertrand Russell discovered his paradox
5. Flew, Anthony (ed.), Essays in Conceptual Analysis, London: Macmillan, 1960