Dewey Cornell, a clinical psychologist and professor of education at the University of Virginia, said that even if Duncan’s statistic were true, "it would be misleading and incomplete," because it does not address how many people grew up in father-absent households and did not commit felonies. "We could point out that 99 percent of felony offenders drank milk as a child, too, but it is easy to see the fallacy here because we have no preconceptions about milk the way we do about father absence," he said. "Father absence is surely an important concern, but it is on...