以下是引用xxiaoyan在2005-7-20 13:25:00的发言:谢谢你的解释,但是我有个问题,C选项中说的是People with high immune-system activity cannot develop mental illness,那么取非应该是People with high immune-system activity can develop mental illness,我的理解是与人数没有什么关系 继续讨论 刚才看了OG11的解释,再想了想,我想,对于C取非的结论和原文结论对照其实可以看出区别: C取非:People with high immune-system activity can develop mental illness原文结论:concluded from this experiment that the immune system protects against mental illness as well as against physical disease. OG11解释C: Immune-system activity could protect mental health without offering total prevention of mental illness;this assumption is not needed. 综上,i-s只是protect again,并不能保证total prevention,即:protect和develop并非互斥的,这样说,C其实并没有削弱原结论。个人理解,C其实是无关项,按照<logical reasoning bible>的说法,我认为C因该算是个shell game,因为它误导我们以为protect against就一定是develop的反面了。 个人理解,欢迎大家继续讨论。
[此贴子已经被作者于2006-12-3 0:49:38编辑过] |