1. Camp, E. (2004) ‘The Generality Constraint and Categorical Restrictions’, Philosophical Quarterly 54: 210–31.
2. Conant, J. (2002) ‘The Method of the Tractatus’ in E. Reck (ed.) From Frege to Wittgenstein ( Oxford: Oxford University Press ), pp. 374–470.
3. Crary, A. and Read, R. (2000) The New Wittgenstein ( London: Routledge).
4. Diamond, C. (1991) The Realistic Spirit ( Cambridge, Mass.: MIT Press).
5. Diamond, C. (2000) ‘Ethics, Imagination and the Method of Wittgenstein’s Tractatus ’ in A. Crary and R. Read (eds) The New Wittgenstein ( London: Routledge ), pp. 149–73.