请教OG逻辑的84对错误选项的解释

牛肉面三碗 · 发表于 2011-3-23 21:31:02

84. Many people suffer an allergic reaction to certain sulfi tes, including those that are commonly added to wine as
preservatives. However, since there are several winemakers who add sulfi tes to none of the wines they produce,
people who would like to drink wine but are allergic to sulfi tes can drink wines produced by these winemakers
without risking an allergic reaction to sulfi tes.
Which of the following is an assumption on which the argument depends?
(A) These winemakers have been able to duplicate the preservative effect produced by adding sulfi tes by
means that do not involve adding any potentially allergenic substances to their wine.
(B) Not all forms of sulfi te are equally likely to produce the allergic reaction.
(C) Wine is the only beverage to which sulfi tes are commonly added.
(D) Apart from sulfi tes, there are no substances commonly present in wine that give rise to an allergic reaction.
(E) Sulfi tes are not naturally present in the wines produced by these winemakers in amounts large enough to
produce an allergic reaction in someone who drinks these wines.
Argument Construction
Situation People who are allergic to certain sulfi tes can avoid risking an allergic reaction by
drinking wine from one of the several producers that does not add sulfi tes.
Reasoning On what assumption does the argument depend? Drinking wine to which no sulfi tes have
been added will not prevent exposure to sulfi tes if, for instance, sulfi tes occur naturally in
wines. In particular, if the wines that do not have sulfi tes added have sulfi tes present
naturally in quantities suffi cient to produce an allergic reaction, drinking these wines will
not prevent an allergic reaction. Th e argument therefore depends on assuming that this is
not the case.
A Th e argument does not require this because the conclusion does not address allergic reactions to
substances other than sulfi tes.
B Th e argument specifi cally refers to “certain sulfi tes” producing allergic reactions. It is entirely
compatible with certain other forms of sulfi tes not producing allergic reactions in anyone.
C Th is is irrelevant. Th e argument does not claim that one can avoid having an allergic reaction to
sulfi tes from any source just by restricting one’s wine consumption to those varieties to which no
sulfi tes have been added.
D Once again, the argument’s conclusion does not address allergic reactions to substances other
than sulfi tes in wine.
E Correct. Th e argument relies on this assumption.

我不明白为什么AD的错误在于does not address allergic reations to substances other than sulfites in wine?
请大侠们帮帮忙！！！

sdcar2010 · 发表于 2011-3-23 21:48:19

For all CR questions, you have to know what the conclusion is and what is the scope thereof. For assumption questions, anything out of scope in the answer choice would not make the same choice the correct answer. The assumption you are looking for HAS to work within the same scope of the argument presented in the stimulus.

In addition, for necessary assumption, the quickest way is to use negation method, which I have used many a time to find the correct answers.

牛肉面三碗 · 发表于 2011-3-24 00:06:58

谢谢哇，你的理论很扎实嘛

请教OG逻辑的84对错误选项的解释

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