Had the psychological inquiry into her condition stopped there, she would have been declared a fit subject for institutional care, according to the Binet-Simon rating. But Doctor Wallin insisted on additional and different testings, and presently made the significant discovery that her trouble lay, not in any structural brain defect, but in a functional weakness of the nervous system that caused her to become fatigued at slight mental exertion. She was, in short, a "psychasthenic," and needed only proper treatment by a skilled neurologist to be put into condition to profit from her lessons as her schoolmates did. So, too, with a man of twenty-eight, who, tested by the Binet-Simon system, displayed the mentality of a boy of twelve. Had he been in the hands of an investigator who knew no more of the technic of psychological examination than the Binet-Simon scale, he would unhesitatingly been classified as feeble-minded. But, as Doctor Wallin said, in discussing the case: "He did not impress me at all as being feeble-minded. His appearance, speech, and conduct suggested the polished and cultivated gentleman. I put him through approximately thirty sets of mental tests [other than twenty-five individual Binet tests] and thirty moral tests. These tests demonstrated that there was a considerable difference in the strength of his different mental traits. Some traits were on the twelve-year plane, some on the fifteen-year, and some on the adult plane. In some mental tests he did as well as college men. He passed correctly practically all of the moral tests. "His was indeed a case showing more or less deficiency in respect to various mental traits. But, contrary to the Binet rating, the man was not feeble-minded. It eventually developed that a sexual complex was at the root of his trouble." Again, with the express purpose of determining the reliability or unreliability of the Binet-Simon tests as sufficient indicators of the mental status, Doctor Wallin applied these tests to several successful farmers and business men. The results were surprising and amusing. He tells us: