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December 2004 LSAT
Nylon industry spokesperson: Even though cotton and nylon are used for similar purposes, some people have the mistak...
on September 25 at 09:56PM
Why is E the Correct answer ?
on September 25 at 10:50PM
Conclusion: The notion that cotton is natural but nylon is not is mistaken. (In other words, the author concludes that nylon is natural.)
Premise: Nylon's main components are petroleum and nitrogen.
Premise: Nylon comes from the atmosphere, which is natural.
Premise: Petroleum comes from oil, which comes from ancient plants, which are natural.
The spokesperson's conclusion, in order to be justifiable, requires that either cotton is unnatural, or nylon is natural. The argument proceeds with the latter, suggesting that nylon is natural because its main components have natural sources.
We need an answer choice that helps to justify the conclusion. Our correct answer must link the given premises to the conclusion. Answer choice E does so perfectly, because it demonstrates that the main components argument leads to the spokesperson's conclusion.
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