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- 2022-7-13
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1. 修桥
一个地方要修桥。修桥的钱要从民众募集。但是这个桥只有一部分居民经常使用,另一部分住在偏远地方的人用不上。所以向所有人募集钱是不公平的。Assumption
前提:一部分在偏远地区的人用不上这个桥
结论:向所有人募集钱不公平
演绎推理
假设:建了这个桥后对偏远地区的人的生活没有一点改善(不会方便贸易之类的)
2. 珍稀白鲸
有一种珍稀白鲸 死亡率很高 而且原因是因为colison(忘了怎么拼了就是撞击那个单词)with ships 所以就调低了在某些白鲸密集区域船只航行速度的limit 果然白鲸数量上升了 说明政策有效 问还需要知道什么条件 我选的是在没限速的区域白鲸的数量
事实:白鲸因为撞击船,死亡率很高
前提:调低白鲸密集地区船航行速度
结论:白鲸数量上升,政策有效
逻辑链:调低速度-白鲸数量⬆️
补充条件:上升的数量是不是在这个降低速度的地区发生的
3. 三文鱼和小虾米
The economy around Lake Paqua depends on fishing of the lake's landlocked salmon population. In recent years, scarcity of food for salmon there has caused a decline in both the number and the size of the adult salmon in the lake. As a result, the region's revenues from salmon fishing have declined significantly. To remedy this situation, officials plan to introduce shrimp, which can serve as a food source for adult salmon, into Lake Paqua.
前提:三文鱼的食物减少,导致三文鱼数量大小下降
方案:引入虾作为三文鱼的食物
方案推理
Which of the following, if true, most seriously calls into question the plan's chances for success?
削弱:副作用、可行性、可操作性
(A) Salmon is not a popular food among residents of the Lake Paqua region.
(B) Tourists coming to fish for sport generate more income for residents of the Lake Paqua region than does commercial fishing.
(C) The shrimp to be introduced into Lake Paqua are of a variety that is too small to be harvested for human consumption.
(D) The primary food for both shrimp and juvenile salmon is plankton, which is not abundant in Lake Paqua. 引入虾,虾还得和三文鱼竞争食物,自己估计也活不久
(E) Fishing regulations prohibit people from keeping any salmon they have caught in Lake Paqua that are smaller than a certain minimum size.
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