Suppose a terrorist is pulling out his victim’s teeth one by one, and that the only way to stop him is to kill him. Most people would say that doing so is permissible, even though the harm to the aggressor is much greater than the value of the victim’s teeth.
任何时候受到身体上的危害，使用所有必需的武力都是允许的。设想一下，一名恐怖分子在把受害者的牙一颗一颗地拔出来，而唯一制止他的方式就是将其击毙。大多数人会说这样做是允许的，即使对侵犯者的伤害远远大于受害者牙齿的价值。