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四天GMAT邏輯學習法

 來源:chasedream    要點:GMAT邏輯學習法  
編輯點評: 做邏輯題,總結是關鍵,總結到最后會發現,邏真的不難。不管題目怎么問都萬變不離其宗,歸根到底就在考邏輯鏈!

reebe不是什么大牛,一戰成績只有Verbal拿的出臺面。CR曾經是樓主的雞肋,這部分的提高幫了不小的忙。以前因為OG邏輯一半的正確率苦惱過很長時間,試過流行的lawyer邏輯法,也啃過曼哈頓,可能不適合自己所以收效甚微。無奈之中受小安閱讀暴力法的啟發,reebe自創另一個攻克邏輯方法,經過四天時間的試驗終于茅塞頓開。reebe在CD受益太多,真心愿意把它分享給大家,不敢保證絕對的正確合理,也不敢保證適合所有還在迷茫邏輯的XDJM,但如果能起到一點點的幫助,reebe就很欣慰了。巴拉巴拉扯了一堆,下面進入正題~

CR,說白了就是翻來覆去考察邏輯鏈,邏輯鏈研究透徹以后就不怕各種題型的多角度考察,咱要以不變應萬變,對吧

這四天reebe把它分為2+2。材料可以選擇OG或者prep,任何一樣就夠了。前兩天做什么呢,就是老老實實把所有題好好做一遍,用自己的感覺也好猜測也罷,總之題目一定要讀懂,然后根據正確答案把錯題更正。積累了一定的題量,就已經為后兩天暴力邏輯提供了充足的材料。后兩天是最最關鍵的兩天,我們要做什么呢。很簡單,把題目分別歸為高頻的四大類:削弱,加強,評價和假設,分類攻破。每道題剔除各種背景信息,提煉出簡化的邏輯鏈,然后依次縱向羅列出來邏輯鏈的種類可分為四種類型:推理→事實型(文章給出已有的事實,推斷導致該事實的原因);事實→推理型(文章給出已有的事實,推斷事實導致的結果);措施→目的型(為了達到一目的,建議采用某個措施),AB對比型(Eg: A比B好,A比B經濟,etc.)將每題正確答案分別寫在邏輯鏈下,看它是從邏輯鏈哪個環節切入達到削弱/加強/評價/假設的目的。最后歸納總結不同類型邏輯鏈所對應的解題方式。可能有點抽象哈,reebe以削弱類為例解析一下:
____________________________________________________________

推論→事實型 (prep193)

Because it was long thought that few people would watch lengthy televised political messages, most televised political advertisements,like commercial advertisements,took the form of short messages.Last year,however,one candidate produced a half-hour-long advertisement.At the beginning of the half hour slot a substantial portion of the viewing public had tuned in to that station.Clearly,then, many more people are interested in lengthy televised political messages than was previously thought. 削弱

邏輯鏈:更多的人對長廣告感興趣(推理)→有很大部分人將頻道調回長廣告(事實)

答案:這個廣告在精彩的電視節目時段播出。

削弱:他因導致。即:并非人們對長廣告感興趣,而是因為精彩的電視節目才調回頻道。(攻擊推理)

事實→推論型 (prep2-83)

Many people suffer an allergic reaction to sulfites,including those that are commonly added to wine as preservatives.However , since there are several winemakers producing wine to which no sulfites are added, those who would like to drink wine but are allergic to sulfites can drink these wines without risking an allergic reaction to sulfites. 削弱

邏輯鏈:一些酒沒加硫磺(事實)→對硫磺過敏的人可以喝這種酒(推理)

答案:酒中自然產生硫磺

削弱:直接推翻結論。即:就算沒有人為加硫磺,酒里也有可能有硫磺,所以喝這種酒還是有可能過敏,直接推翻結論。(攻擊推理)

TIP:選項永遠都不能質疑已定事實,只能在推理上做文章。

措施→目的型 (prep2-92)

Editor: Articles in Gardening Magazine often spur sales of the plants they describe, particularly among people new to gardening. Accordingly, we will no longer publish articles or accept advertisements praising the beauty of rare wildflowers. Most such plants sold to gardeners have been difficult to propagate under cultivation, so plant sellers often collect them in the wild. Our new policy is part of our efforts to halt this yearly plundering of our native plant populations. 削弱

邏輯鏈:不刊登稀有野花的文章(措施)→阻止野花的數量的減少(目的)

答案:賣植物的錢用來研究廉價的給野花授粉技術

削弱:其他因素阻礙目的達成。即:不刊登這類文章就沒有賣植物的錢,也就失去授粉技術的資金,野花的數量還是會減少。

TIP:措施目的型的前提都是假設措施已實施!

AB對比型 (prep2-103)
Electronic computer chips made of tiny silicon wafers now regularly contain millions of electronic switches. Unfortunately, electronic switches that are this small cannot withstand intense radiation. Micro-Mechanics plans to produce a chip that, because it uses only microscopic mechanical switches, will be invulnerable to radiation damage. The switches will, however , be slower than electronic switches and the chip will contain only 12,000 switches. there to be a market for Micro-Mechanics's chip as a result of the apparent advantage described above 削弱

邏輯鏈:M-M芯片比E芯片速度慢且轉換器少,但抗輻射→M-M會有市場(M-M芯片比E芯片好)答案:現在制造出的E芯片能抗輻射了

削弱:縮小比較對象AB的差距。即:A的優勢沒有那么明顯

TIP:縮小AB之間的差距的概念是指,A的優勢沒有那么明顯,并不是B一定得比A好



 

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