"IN FACT, “THERE may not be a single moment when consciousness, or the potential to experience pain, is turned on,” Nicholas Fisk wrote with Vivette Glover, a colleague at Imperial College, in a volume on early pain edited by Anand. “It may come on gradually, like a dimmer switch.” It appears that this slow dawning begins in the womb and continues even after birth. So where do we draw the line? When does a release of stress hormones turn into a grimace of genuine pain?"