[2]Allan F. Randall. Computational Platonism. http://home.ican.net/~arandall/Plato/, Toronto, 1995, 1996. [This contains a brief introduction to the lambda-calculus. Although the lambda-calculus is not dealt with much in this essay, I consider it important to the future development of the ideas.]

[3]Roger Penrose. The Emperor's New Mind: concerning computers, minds, and the laws of physics. Oxford U. Press, Oxford, 1989. [This book contains an excellent introduction to the basic ideas of computability, and gives some idea of their metaphysical relevance. However, Penrose's actual metaphysics is diametrically opposed to mine.]

[4]There are of course many variations on these themes, and not all idealism is rationalist. For an introduction to my own views, which motivate this essay throughout, see "http://home.ican.net/~arandall/".

[5]Parmenides of Elea. On Nature, Allan F. Randall (Ed.). http://home.ican.net/~arandall/Parmenides/, Toronto, c. 475 BC, 1996.

[6]René Descartes. Meditations on First Philosophy. In: Discourse on Method and Meditations on First Philosophy (3rd Ed.), pp. 46-105. Hackett, Indianapolis, 1637, 1641, 1993.

[7]Gottfried Wilhelm Leibniz. G.W. Leibniz's Monadology: an edition for students, Nicholas Rescher (Trans.). U. of Pittsburgh Press, Pittsburgh, 1720, 1991.

[8]F.H. Bradley. Appearance and Reality (2nd Ed.). Clarendon Press, Oxford. In: Writings on Logic and Metaphysics, J.W. Allard & G. Stock (Eds.), pp. 115-225. Clarendon Press, Oxford, 1893, 1897, 1994.

[9]Allan F. Randall. Truth, Coherence and Correspondence in the Metaphysics of F.H. Bradley. http://home.ican.net/~arandall/Bradley/, Toronto, 1996.

[10]Hugh Everett, III. "'Relative state' formulation of quantum mechanics," Reviews of Modern Physics 29, 454--462, 1957.

[11]Allan F. Randall. Quantum Superposition, Necessity and the Identity of Indiscernibles. http://home.ican.net/~arandall/Indiscernibles/, Toronto, 1996.

[12]Brandon Carter. In: Confrontation of cosmological theories with observation, M.S. Longair (Ed.), p. 291. Dordrecht, Reidel, 1974.

[13]John D. Barrow and Frank J. Tipler. The Anthropic Cosmological Principle. Oxford U. Press, Oxford, 1986.

[14]Parmenides[4], fragment 6.

[15]Richard P. Feynman. QED: the strange theory of light and matter. Princeton U. Press, Princeton, 1985.

[16]For those with an interest in infinity: the number of programs produced is countably infinite (like the integers). However, the number of steps required to run them all is uncountably infinite (like the reals).

[17]Nick Herbert. Quantum Reality. Anchor Press/Doubleday, Garden City, New York, 1985. [The best non-mathematical introduction to quantum physics I have seen.]

[18]James Gleick. Chaos: making a new science. Viking Penguin, New York, 1987. [This book gives a very accessible introduction to the theory of chaos--how tiny changes in initial conditions can rapidly have huge macroscopic effects.]