Nevertheless he regarded both the legal notion of sanity and the medical notion of psychosis as being irrelevant to this case.  Here was a human animal who had made a profound and apparently successful adjustment to an alien society... but as a malleable infant.  Could the same subject, as an adult with formed habits and canalized thinking, make another adjustment just as radical, and much more difficult for an adult to make than for an infant?  Dr. Harshaw intended to find out; it was the first time in decades he had taken real interest in the practice of medicine.