by RonPurewal Sat Mar 16, 2013 9:49 am
well, first off, you can eliminate choice (d) pretty quickly, on the grounds that "there is presently no objective test for whiplash" is a fact.
since this is a fact, it can't possibly be a "conclusion" of any kind; conclusions must be claims, not facts. (a fact can't be a conclusion because facts don't require supporting arguments; you can just come out and state them, because they're, well, facts.)
from this point, you don't even have to process the actual material of the argument -- you can just read the transitions, which will give you a remarkably exact sense of what's going on in there.
Some commentators have argued, correctly, that, since (bold #1)...
--> the speaker says "correctly", so it's clear that the speaker accepts bold #1 as correct. on the other hand, that's not significant, because #1 is factual, and the gmat doesn't contain stated facts that turn out to be false (only claims are weakened/disproved on gmat problems).
what's significant is that the fact is used by "some commentators", i.e., other people.**
These commentators are, however, wrong to draw the further conclusion that (bold #2)
--> bold #2 is the other guys' conclusion, and our speaker thinks it's wrong.
so, we want an answer choice that says, "bold #1 is a fact that the other guys use in making their case; bold #2 is the other guys' main point, which is wrong according to our narrator."
that's (a).
(b) is wrong because our narrator doesn't defend the other guys' conclusion; (s)he does the opposite.
(c) is wrong for the same reason as (b), but also because it mis-identifies a fact (bold #1) as a "claim".
(d) is wrong for two reasons: because it mistakenly labels a factual statement as a "conclusion" (as stated above), and also because it says that the fact is used to support an argument with which the narrator agrees. the opposite is true; that fact is used by the narrator's opponent.
(e) is wrong because it says that our narrator disagrees with #1, rather than with #2.
--
**in fact, as soon as you see "some people think...", "it is commonly thought that...", etc. - basically, any form of The other guys think X - you can go ahead and assume that the narrator (= main argument) is going to oppose that point of view.
after all, that's the only sensible rationale for introducing "the other guys" into the argument in the first place. (if the narrator agreed with the other guys, then there would be no point in citing the other guys at all -- i.e., rather than saying The other guys think X, and they're right, the narrator will just say X.)