Hmm.The point was that people with Alzheimers have trouble interpreting images, and obviously remain concious until the latest stages of their disease.

> remain concious until the latest stages of their disease.

Are you saying that people with advanced Alzheimers lose consciousness? That's not the case. Although it might become hard for people with advanced Alzheimers to demonstrate their consciousness, that doesn't mean that their consciousness isn't there.