[揽瓜阁逻辑小分队] day72

PBkk

Day 72
1.        在河边种树
In the arid land along the Colorado River, use of the river's water supply is strictly controlled：farms along the river each have a limited allocation that they are allowed to use for irrigation.But the trees that grow in narrow strips along the river's banks also use its water.Clearly, therefore, if farmers were to remove those trees, more water would be available for crop irrigation.
Which of the following, if true, most seriously weakens the argument?
A. The trees along the river's banks shelter it from the sun and wind, thereby greatly reducing the amount of water lost through evaporation.
B. Owners of farms along the river will probably not undertake the expense of cutting down trees along the banks unless they are granted a greater allocation of water in return.
C. Many of the tree species currently found along the river's banks are specifically adapted to growing in places where tree roots remain constantly wet.
D. The strip of land where trees grow along the river's banks would not be suitable for growing crops if the trees were removed.
E. The distribution of water allocations for irrigation is intended to prevent farms farther upstream from using water needed by farms farther downstream.
C：if farmers were to remove those trees, more water would be available for crop irrigation.
Weaken：
- 原理：直接解释水源不会增加（反而会减少）


2.        辞职的主管
department head. a lot of department heads would retire while the number of qualified person for new head is only half of the posts, which results in the shortage of heads. Many departments of the company will have no head for the company，since...

C：Many departments of the company will have no head for the company
直接解释原理：因为公司不会降低qualification标准、公司不会source outside 等等


3.        没钱修路的政府
A government plans to develop new road, but doesn't have the money. So the government will let a private company to take on the task and develop a new tollway. Oppose: the government let the private company make too much money by collecting toll fees.
Q: What weaken the opponent's argument?



C：the government let the private company make too much money by collecting toll fees.
Weaken：
原理：原理上讲高速公路收费其实不怎么赚钱（收不回成本等）
因果关系：其他地方有类似情况结果公司没赚钱。

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superyingying

1.        在河边种树
前提：在河边的树也用河水
结论：把河边的树砍了，就能有更多的水分配给农民了
削弱：树的减少不会导致有更多的水这个方向
2.        辞职的主管
前提：许多部门的领导要退休了，而合格的领导候选人人数仅为岗位数的一半
结论：公司的许多部门将会没有部门领导
思路：合格的领导候选人人数不会通过其他方式增加
3.        没钱修路的政府
前提：政府准备让私人公司去建立一条新的收费公路
结论：政府让私人公式通过收过路费挣太多的钱
思路：削弱建收费公路和收过路费挣太多钱之间的关系，即达不到挣太多钱这个结果

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