LSAT-3-1-21,LSAT-3-1-24 help

wujie_ren

LSAT-3-I-21 24
21. Pedr Unlike cloth diapers, disposable diapers are a threat to the environment. Sixteen billion disposable diapers are discarded annually, filling up landfills at an alarming rate. So people must stop buying disposable diapers and use cloth diapers.
Maria: But you forget that cloth diapers must be washed in hot water, which requires energy. Moreover, the resulting wastewater pollutes our rivers. When families use diaper services, diapers must be delivered by fuel-burning trucks that pollute the air and add to traffic congestion.

Maria objects to Pedro's argument by

(A) claiming that Pedro overstates the negative evidence about disposable diapers in the course of his argument in favor of cloth diapers.
(B) indicating that Pedro draws a hasty conclusion, based on inadequate evidence about cloth diapers.
(C) pointing out that there is an ambiguous use of the word "disposable" in Pedro's argument
(D) demonstrating that cloth diapers are a far more serious threat to the environment than disposable diapers are
(E) suggesting that the economic advantages of cloth diapers outweigh whatever environmental damage they may cause

The key is B, but what’s wrong with D?

LSAT-3-I-24
24. If a society encourages freedom of thought and expression, then, during the time when it does so, creativity will flourish in that society. In the United States creativity flourished, during the eighteenth century. It is clear, therefore, that freedom of thought was encouraged in the United States during the eighteenth century.

An error of reasoning of the same kind as one contained in the passage is present in each of the following arguments EXCEPT:

(A) According to the airline industry, airfares have to rise if air travel is to be made safer; since airfares were just raised, we can rest assured that air travel will therefore become safer.
(B) We can conclude that the Hillside police department has improved its efficiency, because crime rates are down in Hillside, and it is an established fact that crime rates go down when police departments increase their efficiency.
(C) People who are really interested in the preservation of wildlife obviously do not go hunting for big game; since Gerda has never gone hunting for big game and intends never gone hunting for big game and intends never to do so. it is clear that she is really interested in the preservation of wildlife.
(D) If the contents of a bottle are safe to drink, the bottle will not be marked "position" so, since the bottle is not marked "poison", its contents will be safe to drink.
(E) None of the so-called Western democracies is really democratic, because, for a country to be democratic, the opinion of each of its citizens must have a meaningful effect on government, and in none of these countries does each citizen's opinion have such an effect.

The key is E, but it seems A is not following the line of reasoning of the original version.
A should be           airfares rise-------safer
Safer--------therefore, airfares rise.
Am I wrong?

                  

flora_wang

A) According to the airline industry, airfares have to rise if air travel is to be made safer; since airfares were just raised, we can rest assured that air travel will therefore become safer.

此选相是:
由
非airfares rise------>非air travel be made safer
(等于air travel be made safer---->airfares rise)
得到结论:
airfares rise----->air travel be made safer


和提干一样:
freedom----->florish
得到结论
florish---->freedom

请求指教

flora_wang

LSAT-3-I-21 24
21. Pedro: Unlike cloth diapers, disposable diapers are a threat to the environment. Sixteen billion disposable diapers are discarded annually, filling up landfills at an alarming rate. So people must stop buying disposable diapers and use cloth diapers.
Maria: But you forget that cloth diapers must be washed in hot water, which requires energy. Moreover, the resulting wastewater pollutes our rivers. When families use diaper services, diapers must be delivered by fuel-burning trucks that pollute the air and add to traffic congestion.

(A) claiming that Pedro overstates the negative evidence about disposable diapers in the course of his argument in favor of cloth diapers.
(B) indicating that Pedro draws a hasty conclusion, based on inadequate evidence about cloth diapers.
(C) pointing out that there is an ambiguous use of the word "disposable" in Pedro's argument
(D) demonstrating that cloth diapers are a far more serious threat to the environment than disposable diapers are
(E) suggesting that the economic advantages of cloth diapers outweigh whatever environmental damage they may cause

The key is B, but what’s wrong with D?

这个偶也错了. 再想想, 看了mindfree 哥哥的几个贴子, 觉得好象是这样: 关键看问提先:

Maria objects to Pedro's argument by :
是要求从逻辑推理上回答

在看题目edro:先提结论B, 再给原因 A, 就是A----->B

Maria:没说别的就说: But you forget that A1, A2, A3 问题不是Maria这里到底认为是哪种diaper更污染环境, 关键是Pedro的逻辑推理有缺陷,所以Maria补充了3个evidence,
Maria 本人的论点不重要, 换句话说, 即使有A1,A2,A3, maria也可能认为disposal diaper更污染环境. M是不同意P的推理方法....

可以看看这

http://forum.chasedream.com/dispbbs.asp?boardID=24&ID=2983

请求指教