 Consider the paternity case State v. Boyd (331 N.W.2d 480, Minn. 1983). Expert witness Dr. Polesky testified that 1,121 unrelated men would have to be randomly selected from the general population before another man could be found with all the appropriate genes to have fathered the child in question. This formulation can be misleading since the expected number of matching DNA profiles need not be the same as the number of matching profiles actually found in a population (the error of thinking otherwise is called the expected value fallacy). On a more careful formulation, the probability that a random person  would be a  match is \(\slashfrac{1}{1121}\), or in symbols, 