GMAT考試邏輯之假言三段論.

怎樣復(fù)習(xí)GMAT考試邏輯呢?很多考生不知道GMAT邏輯有哪些復(fù)習(xí)的重點(diǎn)。這里給大家重點(diǎn)介紹的是邏輯中的假言三段論，澳際小編下面給GMAT入門的同學(xué)詳細(xì)的分析一下，希望考生們注意：

　　l 具有“如果p,則q的形式，與之相矛盾的形式：“P且非Q”或“非Q且P”

　　l 當(dāng)一些推論由問題的時(shí)候，GMAT考試一定要用一些非常強(qiáng)的假設(shè)，如only ,the only ,wheather---or not ,all

　　1 If the airspace around centrally located airsports were restricted to commercial airliners and only those private planes equipped with radar ,most of the private planes traffic would be forced to use outlying airfields .such a reduction in the amount of private-plane traffic would reduce the risk of midair collision around the centrally located airports.

　　標(biāo)準(zhǔn)形式：前提1：if the airspace around centrally located airports were restricted to commercial airliners and only those private planes equipped with radar.

　　結(jié)論：most of the private planes traffic would be forced to use outlying airfields.

　　2 In order to be happy , one must have an intimate relationship with another person .yet the world’s greatest composers spent most of their time in solitude and had no intimate relationships.so the psychological theory must be wrong.

　　標(biāo)準(zhǔn)形式：if p( to be happy),then q (one must have an intimate relationship with another person ).

　　結(jié)論：But its wrong.┐q

　　前提：p

　　3 if the edition sold in Britain were in American English, its idioms and spellings would appear to British readers to be strikingly American

　　結(jié)論： to conflict with the novel’s setting.

　　標(biāo)準(zhǔn)形式：思路歸繆法(排除其他可能)注意 NO

　　前提：

　　4 In a bureaucracy ,all decisions are arrived at by a process that involves many people. There is no one person who has the authority to decide whether a project will proceed or not .

　　結(jié)論： in bureaucracy ,risky projects are never undertaken.

　　標(biāo)準(zhǔn)形式：

　　1) only one person decision is a risky project.

　　2) 排除

　　5 the apple sold in this cafeteria are greasy. The cashier told me that the apples are in that condition when they are delivered to the cafeteria and that the cafeteria does not wash the apples it sells. Most fruit is sprayed with dangerous pesticides bore it is harvested,and is dangerous until it is washed .Clearly, the cafeteria is selling pesticide-covered fruit,thereby endangering its patrons.

　　標(biāo)準(zhǔn)形式：1)徹底排除在進(jìn)入飯店以前被清洗的可能

　　二， 小結(jié)：GMAT邏輯如果論證都是有明顯缺陷的，假設(shè)的作用在于彌補(bǔ)其中的缺陷。而對于一個(gè)一個(gè)論證而言，最嚴(yán)重的缺陷就是反例的存在，即與論證的結(jié)論相矛盾的命題的存在。從這個(gè)角度而言，GMAT入門假設(shè)的作用就是防止反例的產(chǎn)生，排除反例的存在。然而，要彌補(bǔ)一個(gè)有缺陷的論證，排除一個(gè)有缺陷的論證的反例，其假設(shè)一定視角絕對的，或者說是較苛刻的。這種假設(shè)在語言的標(biāo)志是使用諸如ALL,EVERY,NO,ONLY ,AT LEASTZ這樣的詞

　　上述就是小編總結(jié)的GMAT考試關(guān)于邏輯的一些常識，假言三段論是GMAT邏輯非常重要的部分。不太懂的GMAT入門考生可以多參考一下上述的這些知識，希望大家能順利的復(fù)習(xí)好邏輯部分，拿到邏輯的高分。

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