John Allen Paulos, Beyond Numeracy
(New York: Vintage Books, 1992), p. 108 (discussing Eli Halberstam's novel Rucker: A Life Fractal
Rucker idly picks his nose while thinking about his theorems, and if the reader chooses to follow up on this, he is directed to a page (on the disk version the alternatives are listed on a menu which appears at the bottom of the monitor) where Rucker's keen interest in proboscis probing is discussed at length. What percentage of people pick their noses? Why do so few people do it in public; yet, in the false privacy of their automobiles why do so many indulge? If you push even further in this direction, there is the memory from a few weeks previous when Rucker, stopped at a red light, saw the elegantly coiffed Mrs. Samaras seated in the BMW across from him, her index finger seemingly deep into her frontal cortex.