SDCAR2010【逻辑入门】（八）Assumptions

lianlianchen

LZ的头像看了眼晕, 你之前那些美男美女的头像多养眼啊, 抽空换一换吧, 请照顾一下你的FANS的视力.

纳什总冠军

非常感谢SDcar的题目和解析，不过我有如下几个问题，希望您能抽空解答一下：

1.我在做逻辑题目特别是假设题目的时候常常会因为几个比较关键的词不知道是什么意思而严重影响我对这个argument的理解，导致最后不知所云，因此想请教一下，怎样能在完全不知道argument在讲什么的时候把正确的选项选择出来？

2.关于您给出的10道necessary Assumption中的Q10，我是negativea D,结果是Apart from sulfites, there are substances commonly present in wine that give rise to an allergic reaction.我个人感觉这说明了即使有些商人没有添加s，还是有些消费者会allergic。

3.Q6的A选项， Not being able to take college-level courses while in prison is unlikely to deter anyone from a crime that he or she might otherwise have committed. 这句话中文意思是什么，取非后是否能反驳conclusion?

谢谢解答！

helenlife

Hi SDCAR2010，

Just get a question: What's the difference between assumption and premise?

It seems critical for certain types of CR.

Look forward to your explanation.

Thanks!

sdcar2010

Assumption = "unstated" premise

caoqin1981

这个贴让我更加清楚了什么是普通的充分条件，什么是必要且充分条件，谢谢LZ的分享

waiting1

5. Excavations of the Roman city of Sepphoris have uncovered numerous detailed mosaics depicting several readily identifiable animal species:  a hare, a partridge, and various Mediterranean fish.  Oddly, most of the species represented did not live in the Sepphoris region when these mosaics were created.  Since identical motifs appear in mosaics found in other Roman cities, however, the mosaics of Sepphoris were very likely created by traveling artisans from some other part of the Roman Empire.

这题牛牛为什么选C呢？我在做gwd时遇到了这题，我自己也选的c，但答案给的是E。。。牛牛能解释下e哪里不对吗？谢谢

sdcar2010

I was wrong. E is right. Sorry.

suntree846

hello LZ:
10. Many people suffer an allergic reaction to certain sulfites, including those that are commonly added to wine as preservatives. However, since there are several wine makers who add sulfites to none of the wines they produce, people who would like to drink wine but are allergic to sulfites can drink wines produced by these wine makers without risking an allergic reaction to sulfites.

Which of the following is an assumption on which the argument depends?
A. These wine makers have been able to duplicate the preservative effect produced by adding sulfites by means that do not involve adding any potentially allergenic substances to their wine.
B. Not all forms of sulfite are equally likely to produce the allergic reactions.
C. Wine is the only beverage to which sulfites are commonly added.
D. Apart from sulfites, there are no substances commonly present in wine that give rise to an allergic reaction.
E. Sulfites are not naturally present in the wines produced by these wine makers in amounts large enough to produce an allergic reaction in someone who drinks these wines.

i can't understand what's wrong with the answer(D)

look forward to you explanation!
thx!

sdcar2010

Remember: focus on the conclusion, which deals with allergy to SULFITES. We do not care if there are other allergic substances in wine.

hello LZ:
10. Many people suffer an allergic reaction to certain sulfites, including those that are commonly added to wine as preservatives. However, since there are several wine makers who add sulfites to none of the wines they produce, people who would like to drink wine but are allergic to sulfites can drink wines produced by these wine makers without risking an allergic reaction to sulfites.

Which of the following is an assumption on which the argument depends?
A. These wine makers have been able to duplicate the preservative effect produced by adding sulfites by means that do not involve adding any potentially allergenic substances to their wine.
B. Not all forms of sulfite are equally likely to produce the allergic reactions.
C. Wine is the only beverage to which sulfites are commonly added.
D. Apart from sulfites, there are no substances commonly present in wine that give rise to an allergic reaction.
E. Sulfites are not naturally present in the wines produced by these wine makers in amounts large enough to produce an allergic reaction in someone who drinks these wines.

i can't understand what's wrong with the answer(D)

look forward to you explanation!
thx!

-- by 会员 suntree846 (2011/10/3 10:56:21)

suntree846

I see
thank you!