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标题: 请教关于weaken的问题 [打印本页]

作者: shineyang 时间: 2011-7-31 12:46
标题: 请教关于weaken的问题
Premise

rinking milk causes cancer.
Premise:In North American, people drink a lot of milk.
Conclusion:Therefore, there is a high frequency of cancer in NA.
谁能帮忙分析一下这个weaken的原因啊？谢谢谢谢啦！

作者: sdcar2010 时间: 2011-7-31 19:51
1) In North American, people exercise regularly. Study shows that exercising regularly has anti-cancer effect.
2) Study shows that people in NA have a special anticancer gene.
3) Study shows that drinking 3 cups of milk daily causes cancer, but drinking 1 cup of milk daily does not cause cancer. In NA, people drink one cup of milk daily.

作者: eynl12345 时间: 2011-7-31 20:05
我做题时喜欢把这种题目归为预测型。
我的思路就是寻找反作用因素或者质疑前提的正作用不够
LS的1，2就是在找反作用因素，3就是质疑前提的正作用不够。

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