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首頁 · 留學考試 · GMAT 留學考試

美國留學,GMAT邏輯技巧的核心要點總結

發布時間:2016-10-26 作者:美國本科留學小編     來源:美國留學

     

  GMAT邏輯題作為GMAT語文的一部分,十分考查大家的邏輯推理能力,面對GMAT邏輯的多變題型,只有掌握一些技巧,才能妥善處理GMAT邏輯。下面為大家整理對于GMAT邏輯技巧的解讀,供大家參考學習。


  GMAT邏輯推理對很多同學來說都是一大難點,只有掌握好GMAT邏輯技巧才能從容應對GMAT邏輯題庫。


  GMAT邏輯推理中的假設題型作為一類??碱}型有著非常重要的意義,往往在考試時,考生卻不知道應該如何有效找到可以使得整個推理成立的必要條件,或者考生往往出于使推理一定正確的心理,在各個選項中游走不定,最終導致考生無法清楚到底哪個選項才是“真正”的符合題干要求的推理條件。其實我們在解題的過程中把握一個宗旨,也許我們就會發現其實假設題型并非我們想象的那樣難,這個宗旨就是:只需要找到一個能使得推理成立的條件或者說是必要條件,我們不需要去保證通過這個條件推理一定做到正確。下面就讓我們通過實例對考生在假設推理的過程中容易出現的錯誤進行解析。


  無法找出題干中討論對象之間的本質關系


  例:A thorough search of Edgar Allan Poe’s correspondence has turned up not a single letter in which he mentions his reputed morphine addiction. On the basis of this evidence it is safe to say that Poe’s reputation for having been a morphine addict is undeserved and that reports of his supposed addiction are untrue.


  Which of the following is assumed by the argument above?


  (A) Reports claiming that Poe was addicted to morphine did not begin to circulate until after his death.


  (B) None of the reports of Poe’s supposed morphine addiction can be traced to individuals who actually knew Poe.


  (C) Poe’s income from writing would not have been sufficient to support a morphine addiction


  (D) Poe would have been unable to carry on an extensive correspondence while under the influence of morphine


  (E) Fear of the consequences would not have prevented Poe from indicating in his correspondence that he was addicted to morphine.


  上述題干中提到:一、研究發現Poe的信件中未提及他患有嗎啡癮;二、Poe沒有嗎啡癮


  本題極力在讓考生從“對Poe的信件調查[證據]→Poe未患有嗎啡癮[結論]”找出兩者的內在聯系,5個選項中也給出了不同的假設,那么我們只需通過反推,來找出一種能夠使得推理成立的假設條件即可,但考生往往會拋開“信件調查”去思考其他使得上述結論正確的條件(假設),換句話說考生往往會認為除了對信件的調查這樣一個證據以外,還可以有其他證據能夠推出Poe未患有嗎啡癮。通常來講,當一個推理是從一個我們已知的,已經發生的事實推斷出一個結論的時候,我們需要記住的就是,其中的隱含假設多為這個結論的唯一原因,換句話說,在本題中要想對Poe的信件做出說明,那么我們只能假定Poe不會因害怕后果而不在其信件中提及對嗎啡的嗜好,本題的正確假設選項為E.

 

以上是留學美國網為大家推薦的美國留學,GMAT邏輯技巧的核心要點總結,如需更多幫助請咨詢我們的全國免費電話:400-000-7805;010-65183908詳情咨詢】或參與免費評估,以便給您進行準確定位。

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