This forecast is, I trust, sufficiently detailed so that you will have no difficulty in checking its accuracy or its lack thereof?"
"Detailed! Accuracy!" Samms could scarcely think. "But listen—not that I want to cross you up deliberately, but I'll tell you now that a man doesn't like to get sliced by a barber, even such a little nick as that. I'll remember that address—and the cat—and I'll never go into the place!"
"Every event does affect the succession of events," Mentor acknowledged, equably enough. "Except for this interview, you would have been in New Orleans at that time, instead of in Spokane. I have considered every pertinent factor. You will be a busy man. Hence, while you will think of this matter frequently and seriously during the near future, you will have forgotten it in less than five years. You will remember it only at the touch of the astringent, whereupon you will give voice to certain self-derogatory and profane remarks."
"I ought to," Samms grinned; a not-too-pleasant grin. He had been appalled by the quality of mind able to do what Mentor had just done; he was now more than appalled by the Arisian's calm certainty that what he had foretold in such detail would in every detail come to pass. "If, after all this Spokane—let a tiger-striped kitten jump into my lap—let a left-handed Tony Carbonero nick me—uh-uh, Mentor, UH-UH! If I do, I'll deserve to be called everything I can think of!"
"These that I have mentioned, the gross occurrences, are problems only for inexperienced thinkers." Mentor paid no attention to Samms' determination never to enter that shop. "The real difficulties lie in the fine detail, such as the length, mass, and exact place and position of landing, upon apron or floor, of each of your hairs as it is severed. Many factors are involved. Other clients passing by—opening and shutting doors—air currents—sunshine—wind—pressure, temperature, humidity. The exact fashion in which the barber will flick his shears, which in turn depends upon many other factors—what he will have been doing previously, what he will have eaten and drunk, whether or not his home life will have been happy ... you little realize, youth, what a priceless opportunity this will be for me to check the accuracy of my visualization. I shall spend many periods upon the problem. I cannot attain perfect accuracy, of course. Ninety nine point nine nines percent, let us say ... or perhaps ten nines ... is all that I can reasonably expect...."