GMAT逻辑基础大讲堂之Assumptions(二).

　　GMAT逻辑考试需要考生着重备考的知识点有哪些?以下将由备考达人为大家深入分析和讲解GMAT逻辑的基本知识点，刚刚接触GMAT逻辑考试的同学们不妨来参考一下，或许能够从中得到一些启发。

　　Jumps in Reasoning

　　Jumps can occur between the premises and the conclusion or between each premise. Here is a jump between premises:

　　1. Our school requires some of the highest tuitions in the country.

　　2. High tuitions in any school discourage poor students from attending.

　　3. Discriminatory schools cannot attract the best and the brightest students.

　　Therore, our school cannot attract the best and the brightest students.

　　The first and second premises are related, but not perfectly: schools that impose the highest tuitions do not necessarily impose high tuitions – only tuitions that are higher than other schools. That said, it is not unreasonable to assume that a school with some of the highest tuitions in the country would have high tuitions. So this is a jump, but it is a small one. The second and third premises makes a larger jump: a school discourages poor students from attending is not necessarily a discriminatory school.

　　So in a sufficient assumption question, the correct answer for this argument would likely link these last two phrases together by saying that “any school that discourages poor students from attending is a discriminatory school” or “only discriminatory schools discourage poor students from attending.” Note that both expressions say the same thing because any means if and only means then.

　　Necessary Assumption

　　Prompts for sufficient assumptions:

　　• The conclusion relies on which one of the following assumptionps?

　　• The argument presupposes which one of the following?

　　• The conclusion does not follow unless

　　Bore you look at the answers:

　　1. Pinpoint the main conclusion in the passage. (Read my previous Main Point post.)

　　2. Separate the premises from everything else. After you find the main point, don’t assume that all the other statements are premises; they might include opposing viewpoints, background information, and concessions.

　　3. Are there any jumps between the premises and the conclusion or between each premise? To find these jumps, look for any concepts that are discussed only once. There often two such concepts in the same passage. Unlike the jumps in sufficient assumption passages, however, the jumps in necessary assumption passages are often less obvious.

　　Look for the answer that must be true for the conclusion to stand.

　　1. Ask yourself, “Does this answer have to be true?” Or could the conclusion still be true without it? In other words, if the answer were not true, would it undermine the conclusion? Is it an assumption that the conclusion depends on?

　　2. Negate your last two best answers choices. The negated answer that undermines the conclusion is the correct answer.

　　3. If you spot any jumps, the correct answer will often link those two concepts together.

　　Negating an answer choice

　　Imagine you are eating ice cream anyour friend asks you how it tastes. You reply, “It is sweet.” The negation of this statement is that the ice cream “is not sweet.” The complete opposite of this statement is that the ice cream “is sour.”

　　When you negate an answer, just negate it. Try not to turn it into its opposite. Also, negate either the verb or the quantity, but not both.

　　以上为大家详细介绍了GMAT逻辑考试的基本知识点，考生们可据此作为参考，通过针对性的练习来逐步掌握GMAT逻辑的备考要点，掌握解题规律，从而在GMAT考试中取得更好的成绩。 相关链接：

1.GMAT逻辑基础大讲堂之Assumptions(一)

2.什么是GMAT考试

3.在职考生GMAT考试备考心得总结

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