“I used to believe there was a part of the human brain we couldn’t quite excise, and its sole purpose was to encourage self-destruction. Someday, I thought, the guys working on the BRAIN Initiative would push aside a contour in the gray matter and find a pulsing, jet-black spot. They’d insert a probe into the patient’s head to press the nodule and the patient’s immediate response would be to shout out, “FUCK IT! WHY NOT?”