标题: 是Logic gap还是Feasibility of a premise [打印本页] 作者: angelcity 时间: 2011-6-25 12:52 标题: 是Logic gap还是Feasibility of a premise OG 48.If the county continues to collect residential trash at current levels, landfills will soon be overflowing and parkland will need to be used in order to create more space. Charging each household a fee for each pound of trash it puts out for collection will induce residents to reduce the amount of trash they create; this charge will therefore protect the remaining county parkland.
Which of the following is an assumption made in drawing the conclusion above?选C (A)Residents will reduce the amount of trash they put out for collection by reducing the number of products they buy.
(B)The collection fee will not significantly affect the purchasing power of most residents, even if their households do not reduce the amount of trash they put out.
(C)The collection fee will not induce residents to dump their trash in the parklands illegally.
(D)The beauty of county parkland is an important issue for most of the county's residents.
(E)Landfills outside the county's borders could be used as dumping sites for the county's trash.
我想问一下 "dump their trash illegally "和"the charge will protect the remaning county parklan" 是 "logic gap" 还是"feasiblity of a premise"? 还是其他什么逻辑问题？从题目分析来看，我觉得它是"feasiblity of a premise".但是在manhattan上有道题，我觉得挺类似的，它却被归类为“logic gap” 谢谢！
Country B's oil production is not sufficient to meet its domestic demand. In order to sharply reduce its dependence on foreign sources of oil, Country B recently embarked on a program requiring all of its automobiles to run on ethanol in addition to gasoline. Combined with its oil production, Country B produces enough ethanol from agricultural by-products to meet its current demand for energy. Which of the following must be assumed in order to conclude that Country B will succeed in its plan to reduce its dependence on foreign oil ?
answer:
(D) In Country B, gasoline consumption is not increasing at a substantially higher rate than domestic oil and ethanol production.
(A)Residents will reduce the amount of trash they put out for collection by reducing the number of products they buy.
(B)The collection fee will not significantly affect the purchasing power of most residents, even if their households do not reduce the amount of trash they put out.
(C)The collection fee will not induce residents to dump their trash in the parklands illegally.
(D)The beauty of county parkland is an important issue for most of the county's residents.
(E)Landfills outside the county's borders could be used as dumping sites for the county's trash.
我想问一下 "dump their trash illegally "和"the charge will protect the remaning county parklan" 是 "logic gap" 还是"feasiblity of a premise"? 还是其他什么逻辑问题？从题目分析来看，我觉得它是"feasiblity of a premise".但是在manhattan上有道题，我觉得挺类似的，它却被归类为“logic gap” 谢谢！
Country B's oil production is not sufficient to meet its domestic demand. In order to sharply reduce its dependence on foreign sources of oil, Country B recently embarked on a program requiring all of its automobiles to run on ethanol in addition to gasoline. Combined with its oil production, Country B produces enough ethanol from agricultural by-products to meet its current demand for energy. Which of the following must be assumed in order to conclude that Country B will succeed in its plan to reduce its dependence on foreign oil ?
answer:
(D) In Country B, gasoline consumption is not increasing at a substantially higher rate than domestic oil and ethanol production.
其一：计划的目的。In order to sharply reduce its dependence on foreign sources of oil。即使假设D不成立，这个目的一样可以达到。因为若不执行这个计划，dependence会更加更加严重，执行了肯定会减少这个dependence。也就是说D根本不是个必要假设。
其二：ethanol的产量的绝对大小没有说明白，只是说enough to meet its current demand for energy.这个enough可以是刚刚好够，也可以非常充足。换句话说，如果ethanol产量的基数很大，即时gasoline consumption增速很大，在相当一段时间内仍然能够保持enough。
看来曼哈顿的逻辑不行啊，难怪大家都推MANHATTAN的SC，从来不推它的CR作者: angelcity 时间: 2011-6-26 09:41
楼上早!抱歉我怎么把问题贴得这么乱，呵呵，你还能看清~ 排除了一种“计划本身会引入新问题而影响结果”的可能性，好象叫“Alternate model of causation”, whatever,叫什么也无所谓了，能做对就行。 manhattan的那题,正如你说，估计只能在一堆选项中"矮子拔将军"了。 但是它也提到这么一句话:一个现象，如果要找出其主要原因和各种可能性，可能是无穷尽的。但如果选项里只给你这个scope，并且可能正确选项甚至都不是按常规分析最最重要的哪个原因，但你还是在这个scope里挑吧~（呵，有点像为自己设计的题目开脱一下） BTW，逻辑你有什么首推的复习资料么？我才刚开始，没有什么idea，看各种心经看得都乱了。。。作者: colasama 时间: 2011-6-26 10:04
嗯，的确是只能从选项中找一个相对最好的。但就是感觉有些非官方题的思路不够“正宗”，怕会影响解题方法~
