P: Complying with the new safety regulations is useless. Even if the new regulations had been in effect before last year' s laboratory fire, they would not have prevented the fire or the injuries resulting from it because they do not address its underlying causes. Q: But any regulations that can potentially prevent money from being wasted are useful. If obeyed, the new safety regulations will prevent some accidents, and whenever there is an accident here at the laboratory, money is wasted even if no one is injured. A point at issue between P and Q is whether ['accidents at the laboratory inevitably result in personal injuries', 'the new safety regulations are likely to be obeyed in the laboratory', "the new safety regulations address the underlying cause of last year's fire", 'it is useful to comply with the new safety regulations']