Re: pp3-cr-96

[EE1 (不鹵肋骨)]

※ 引述《chenemily (天天保持好心情)》之銘言：
: In the nation of Partoria, large trucks currently account for 6 percent of
: miles driven on Partoria’s roads but are involved in 12 percent of all
: highway fatalities. The very largest trucks—those with three trailers—had
: less than a third of the accident rate of single- and double-trailer trucks.
: Clearly, therefore, one way for Partoria to reduce highway deaths would be to
: require shippers to increase their use of triple-trailer trucks.
: Which of the following, if true, most seriously weakens the argument?
: A. No matter what changes Partoria makes in the regulation of trucking, it
: will have to keep some smaller roads off-limits to all large trucks.
: B. So far only the best, most experienced drivers for Partorian trucking
: companies have been driving triple-trailer trucks.
: C. Very few fatal collisions involving trucks in Partoria are collisions
: between two trucks.
: D. In Partoria, the safety record of the trucking industry as a whole has
: improved slightly over the past ten years.
: E. In Partoria, the maximum legal payload of a triple-trailer truck is less
: than three times the maximum legal payload of the largest of the
: single-trailer trucks.
: 想請問正解 B
: 題目的因果: 增加triple-trailer trucks----highway deaths下降
: 其他選項我都可以排除
: 可是B是哪裡反駁
: 請大大幫忙一下
: 謝
剛在GMATCLUB.com做到這一題
我跟一些外國朋友一樣思考(B)選項時出了問題
我解讀(B)選項時跟他們一樣心裡想的是：
　　倘若只有最棒最具經驗的司機才能開三節大卡車
　　所以實施政策以後當然可以降低事故死亡率
　　因為這種車只有最優秀的菁英（經過嚴格的訓練考試實習篩選後）才能開
　　所以(B)反而是strengthen
結果真的大出我意料之外
到底我的思考邏輯出了什麼問題呢？

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◆ From: 61.227.39.63
推 gray43:母群體問題:三節車目前事故低是因為駕駛都是最好的
→ gray43:但若依argument去提高三節車數量,目前開單節車的司機也會
→ gray43:開始開三節車,導致駕駛素質下降
→ gray43:另外也可說是走他因:B選項暗示車子的事故發生率與駕駛
→ gray43:而非車子大小有關
→ EE1:問題是題目沒有講說所有最棒的司機都已經開三節車去了
→ EE1:或許還有很多優秀司機因為名額限制被迫開單節車...
→ EE1:開放三節車名額只是把這些原本就符合資格的人挪過來開三節車
→ EE1:如果(B)選項的only改成 most of 或者 all 我才可以認同這選項
推 danyuchn:過度推論了，誰說要經過嚴格考試篩選了。選項只有說目前
→ danyuchn:所有開三節車的人都是好driver，並沒有說未來新的三節車
→ danyuchn:駕駛一定會是好的。請注意「so far」，不要把過去的事實
→ danyuchn:當成未來的理所當然而偷渡一個不存在的前提「只有好駕駛
→ danyuchn:才能有開三節車的資格。」
→ EE1:謝謝Dustin老師