Publications
Gewirth, Alan. 1974. The 'is-ought' problem resolved. Proceedings and Addresses of The American Philosophical Association 47 : 34–61.
Jaggar, Alison. 1974. It does not matter whether we can derive 'ought' from 'is'. Canadian Journal of Philosophy 3 : 373–379.
Perry, Thomas D. 1974. A refutation of Searle's ammended 'is-ought' argument. Analysis 34 : 133–139.
Nesbitt, Winston. 1973. Performatives and the gap between 'is' and 'ought'. Australasian Journal of Philosophy 51 : 165–170.
Oppenheim, Felix E. 1973. Facts and values in politics: Are they separable? Political Theory 1 : 54–68.
Genova, A.C. 1971. Assertion and evaluation in Searle's theory of speech acts. Southwestern Journal of Philosophy 2 : 65–72.
Zemach, Eddy H. 1971. Ought, is, and a game called 'promise'. The Philosophical Quarterly 21 : 61–63.
Searle, John R. 1969. Speech acts: An essay in the philosophy of language. Cambridge University Press.