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I completely agree.How do we know that D is not a simple correlation and a causation instead? Maybe the children were more sincere and hence watched whatever limited educational programs that were being displayed?

A & B are better, I'd say.

Someone, please prove us wrong though :D

Carrotchoppa
I don't think D) is correct. The question asks for something that weakens the claim that early TV's cultural and educational influence was more limited than advocates suggested. We are looking for evidence that early TV had cultural and education influence as a whole.

Just because children who regularly watched TV scored higher than peers who didn't watch TV, does NOT mean that the general population educationally benefited from TV. It could be the case that only 100-200 children watched TV, and while their scores were higher, this does not mean that TV had influence on the population!

Anyone have other thoughts? (I put B, but it isn't a great answer either).
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I don't think D) is correct. The question asks for something that weakens the claim that early TV's cultural and educational influence was more limited than advocates suggested. We are looking for evidence that early TV had cultural and education influence as a whole.

Just because children who regularly watched TV scored higher than peers who didn't watch TV, does NOT mean that the general population educationally benefited from TV. It could be the case that only 100-200 children watched TV, and while their scores were higher, this does not mean that TV had influence on the population!

Anyone have other thoughts? (I put B, but it isn't a great answer either).

Why did you pick 100-200? Why not 2 or 2 Million?

What you did was trying to weaken an answer choice when you needed to weaken the argument. Taking a contrary assumption (“maybe only 100 kids watched”) requires outside speculation, and is something you don't want to invest your efforts into as you are now wading into the territory of "what constitutes a valid 6-year study" in 1957 with children. Are you able to evaluate that kind of an argument? Exactly, nobody probably can, and that is exactly why GMAT does not want you wondering about the answer choices and waste your energy there.

On the GMAT CR and RC we assume statements offered as new evidence are credible unless the choice itself casts doubt (e.g., “in a sample of twelve children...”). (D) gives no red flags to feel it was not statistically sufficient; “long-term studies” implies robustness. It did not give a number but that's not a weakness but rather if it did give a number, how would you be able to evaluate it? Would 200 be enough? or 2,000? or 200,000? But what if at that time only a small share of the populate had TV and so 200 was a significant number?



B addresses just one of the author’s four points, it is a weak weakener that weakens the overall claim only slightly.
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You are focusing on the wrong target. Take a look at this Official Guide RC question - it has the same situation.

https://gmatclub.com/forum/much-researc ... 22701.html

Q: Which of the following, if true, would most tend to weaken the conclusions drawn from "some research" (see line 8)?

A. In a subsequent study, consumers who were asked to evaluate new products with relatively low prices had the same perception of the products’ performance risk as did consumers who were shown the same products priced more expensively.

Correct answer is A). How do we know that that study was not done with just 2 people and thus was completely invalid? What proof do you have to offer why A should not be the correct answer and perhaps B or C should be the answer?


P.S. In terms of your "causation" - it may be... but for weaken statements, we do not need absolute proof, just a doubt is enough to weaken. If a bank is robed and while the police has no proof that Tom robbed the bank, the fact that Tom was around the bank at the time of the robbery is enough for the police to detain them for questioning (it may have just been a coincidence and he was just working out, so not enough to accuse but enough to suspect). in the Weaken question category, we need suspect, unlike the Must be True category or inference which must be ironclad.


apoorvarora19
I completely agree.How do we know that D is not a simple correlation and a causation instead? Maybe the children were more sincere and hence watched whatever limited educational programs that were being displayed?

A & B are better, I'd say.

Someone, please prove us wrong though :D


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