 In a seminal paper, Andy Clark and David Chalmers (1998) propose the radical thesis that the mind extends beyond the brain and the body, right out into the environment. In their now famous illustration, two characters, Inga and Otto, hear about an interesting exhibition at the Museum of Modern Art. Inga is neurotypical. She recalls the address of the museum and travels there. Otto, on the other hand, has Alzheimer’s disease. Because he forgets things so easily, he maintains a notebook with the addresses of places he is wont to visit. He looks up the address of the museum and travels there. The moral of this illustration is the so-called Parity Principle.