"It's possible that they decided it wasn't worth the risk. And it isn't beyond the pale to suggest that Goyle's understanding of the human psyche is not terribly subtle." A well-directed Memory Charm would probably be the best tool on a sane person, he was sure, but this could have been different. "I don't know why his Healers chose the path they did, and I doubt Goyle or Nott know, either. I would simply send him back to the hospital for a more professional diagnosis - but you seemed to think it was worth quite a lot of trouble to remove him from St. Mungo's." He glanced across at him. "Changed your mind?"