His dissertation was a statistical study of accumulated fossil data, "an estimation of true taxonomic duration from fossil occurrence data." It asked the question, "Give our actual fossil record, how can we estimate when these organisms actually began to exist and when they became extinct?" After [Kurt] Wise presented his work, one of his peers said, according to Wise, "It's obvious this worked had to be done. We see that now, but we would never have done it. Your creationist worldview made you see things differently. T. Stafford, ed. The Adam Quest (T. Nelson 2013), 20.