The best argument for the tenure system that protects professional employment in universities is that it allows veteran faculty to hire people smarter than they are and yet remain secure in the knowledge that unless they themselves are caught in an act of moral turpitude--a concept that in the present climate almost defies definition--the younger faculty cannot turn around and fire them. This is not true in industry. Which of the following assumptions is most likely to have been made by the author of the argument above? (B)If no tenure system existed, veteran faculty would be reluctant to hire new faculty who might threaten the veteran faculty's own jobs. (D)If a stronger consensus concerning what constitutes moral turpitude existed, the tenure system in universities would be expendable. 答案是B。应该是无因就无果吧! 我的问题是:D为什么不对!书上说对D取非,段落推理仍然可以成立,所以不正确。但是对D取非,not 该加在哪里呢!(从句还是主句啊?)对于假设题用加not 的方法我总是用不好!!经常是不晓得not该加在哪里??