John Locke, excerpts from Essay Concerning Human Understanding (Oxford: 1975)
John Mackie, Problems from Locke, ch. 1 (Clarendon: 1976).
Hardin, “Color and Illusion”, in W. G. Lycan (ed.), Mind and Cognition (Blackwell: 1990).
Alex Byrne and David Hilbert, “Color realism and color science,” Behavioral and Brain Sciences 26 (2003): 3-21; available at http://web.mit.edu/abyrne/www/colorrealismandcolorscience.pdf
Gilbert Harman, “Ethics and Observation”, from his The Nature of Morality, (Oxford University Press: 1977) John Mackie, excerpts from Ethics: Inventing Right and Wrong (Penguin: 1977)
David Lewis, “Dispositional Theories of Value,” Proceedings of the Aristotelian Society, Suppl. Vol. 63 (1989), 113-137
Peter Railton, “Moral Realism,” Philosophical Review 95 (1986), 163-207
Gideon Rosen, “Objectivity and Modern Idealism: What is the Question?”, in Michaelis Michael and John O’Leary-Hawthorne (eds.), Philosophy in Mind, (Kluwer: 1994), pp. 277-319.