Tallis, a Professor of geriatric medicine at the University of Manchester, and Fellow of the Academy of Medical Sciences, challenges the "orthodoxy", held by most neuroscientists and philosophers of the mind, that very soon scientists will be able to explain the mystery of human consciousness in terms of the activity of the brain. He stresses, however, that his argument is not about technical limitations; rather it is about the deep philosophical confusion embedded in the assumption that if you can correlate neural activity with consciousness, then you have demonstrated they are one and the same thing, and that a physical science such as neurophysiology is able to show what consciousness truly is.