A.K. Dewdney. Beyond Reason: 8 Great Problems That Reveal the Limits of Science. Hoboken, New Jersey: John Wiley & Sons, Inc., 2004. 224 pp. $27.95 (cloth).

Some of the integers z will appear inside their corresponding subsets f(z) and some won't. If we take the set of all integers z that are not members of f(z) and place them in a special set W, we can ask a very serious question about W: To