The doctrine concerning man comprises anthropology (including logic and ethics) and politics.

" The typical shallow observer, whose testimony has done so much to prevent anthropology from being a science, would conclude, if he happened to see a Samoyede on one of these "amorous evenings," that he "loved" his wife, whereas it ought to be clear to the most obtuse that he loves only himself, caring for his wife merely as a means of gratifying his selfish appetites.

All that psychology can teach anthropology, on this whole topic of 'possession;' is that secondary or alternating personalities are facts in rerum natura, that the man or woman in one personality may have no conscious memory of what was done or said in the other, and that cases of knowledge said to be supernormally gained in the secondary state are worth inquiring about, if there be a chance of getting good evidence.