1. A.J. Ayer,Language, Truth and Logic(New York: Dover, 1952), p. 115.
2. Main Trends in Recent Philosophy: Two Dogmas of Empiricism
3. Ludwig Wittgenstein,Philosophical Investigations, trans. G.E.M. Anscombe (New York: Macmillan, 1958); J.L. Austin,How to Do Things with Words, 2nd edn, ed. J.O. Urmson and M. Sbisa (Cambridge, MA: Harvard University Press, 1975).
4. Ian Ramsey, ed.Words about God: The Philosophy of Religion(New York: Harper, 1971); Janet Martin Soskice,Metaphor and Religious Language(Oxford: Clarendon Press, 1985).