In many ways, demented patients present the greatest challenge to the question of what makes us human. Victims of dementia seem to lose all power of reason, recognition, speech, and memory. Their minds disintegrate, and all that seems to be left is the physical form. That, too, rapidly fades. Because of this, we tend not to see them as humans, but as something inhuman or formerly human—merely masses of flesh to be tossed aside. But this is a mistake.