LSAT-17-4-12

valarie

12.   A recent study found that snoring, though not common in either group, is more common among smokers than among nonsmokers. On the basis of this evidence, the author hypothesized that smoking by itself can induce snoring.

Which one of the following, if true, casts the most doubt on the author’s hypothesis?

(A) Stress induces both snoring and smoking in certain individuals.

(B) Obesity induces many individuals to smoke.

(C) Most snorers do not smoke.

(D) Most smokers do not snore.（A）

(E) Both smoking and snoring cause throat problems.

Why C is not right? A does not necessarily weaken because "stree induces snoring+smoking in CERTAIN individuals" doesn't mean smoking does not induce snoring in other certain individuals.

C says "most snorers do not smoke", meaning these snorer "the most snorer" get snoring due to other reasons - reasons other than smoking.

lawyer_1

这题确实易错。原文结论是：吸烟单独可能引起SNORING（不是：吸烟可能引起SNORING）。讨论的问题在吸烟是否要和别的因素结合才能引起SNORING。A说要和STRESS结合才能INDUCE SNORING，虽然A说STRESSINDUCE这两样，好像两者没INDUCE关系，但结合原文（吸烟的人比没吸烟的人SNORING多），A说出是STRESS和吸烟结合导致SNORING。故WEAKEN结论的单独

valarie

知道了。说得好。