It took Tom a long time to realize that Danny was not using his father’s violence as a way of excusing his own behaviour. It was rather more sophisticated than that. He was talking about moral circles, the group of people (and animals) inside the circle, whom it is not permissible to kill, and the others, outside, who enjoy no such immunity. For Danny’s father, dogs, cats and most people were inside the circle. Chickens, convicted murderers, rabbits, enemy soldiers, farm animals, enemy civilians (in some circumstances), game birds, children (in uniform), burglars, if caught on the premises, and Irishmen, if suspected of being terrorists and providing the appropriate warnings had been given, were outside. Danny simply presented the picture of a small boy, in short trousers, sitting on a bale of scratchy straw, listening. The question was implicit. You said I had a clear understanding that killing was wrong. Are you sure?