One thing you have to remember about Tom Brown is that he has been given an almost shaman status in some particular Native American culture/nation. He has studied extensively in those ways. As all of us do, we tend to view and approach life through our own worldview. His leans heavily to the natural/spiritual because that is who he is. I am sure that as a shaman (wisdom holder and seeker) he looks to a variety of disciplines to ensure he is gaining as much knowledge as possible to benefit those he comes in contact with. There are aspects of science that, no doubt, are helpful to his craft. Remember, he will view the science through the lens of his natural/spiritual training. There may an effort to resist categorizing and labeling in this instance. This is because those are very Western ideas and processes. He, I believe, just treats it as tracking. In the end, Tom Brown's method is Tom Brown's method.