I am using company pc and no Chinese input (or I cut and paste from other web page), thus I need to use English. Reply to 周自横. For 假言推理 (有p , 有q) there got 3 type: 1.充分条件- 有p 一定有q ,但无p 未必无q 2.必要条件- 无p 一定无q ,但有p 未必有q 3.充分必要条件- 有p 一定有q ,无p 一定无q So you mix-up with 必要条件. The definition of 先決條件 has two. First, some definite as 充分必要条件(mainly for Taiwan scholar), Second, you also can definite as per dictionary (common understanding on this term). As a conclusion, the debate will be the definition argument (depend who can provide better and more persuasive definition) which you should prepare and you can not say “we can accept this definition”, if did so than the judge will make decision. I don’t how the judge come out the result and this is not my concern. I just want to point out debater need to got basis understanding on this. If I am not mistake, the same type of debate topic come up in year 2003 全中辩, but debater still can use this argument. You try to get the previous debate record to learn how the previous debater deliberates the argument (as that time, they are still secondary students). Recommend some good internet resource on logic. < http://www.beidabiz.com/mba/grk/kqfd/lj03.html>, common linguistic logic for who planned to do US degree and need to take GRK Exam. <http://www.pkuschool.com/teacher/details.asp?TopicAbb=directions&SubjectAbb=sx&FileName=g1v4sxb501aa11.htm&FileID=55018&Title=%B3%E4%B7%D6%CC%F5%BC%FE%D3%EB%B1%D8%D2%AA%CC%F5%BC%FE>, more to mathematic logic for who study in mathematic or IT. Last time, I still can some China Mainland debate website explains the logical relation on this topic, but they had removed it since I can not find it. [br][br]-=-=-=-=- 以下内容由 phua1991 在 2006年06月09日 11:49am 时添加 -=-=-=-=-
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