Once there was a little old man. His eyes blinked and his hands trembled; when he ate he clattered the silverware distressingly, missed his mouth with the spoon as often as not, and dribbled a bit of his food on the tablecloth. Now he lived with his married son, having nowhere else to live, and his son's wife didn't like the arrangement.

"I can't have this," she said. "It interferes with my right to happiness." So she and her husband took the old man gently but firmly by the arm and led him to the corner of the kitchen. There they set him on…