OG Weaken

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OG Weaken

by Mo2men » Wed Feb 21, 2018 11:24 am
A greater number of newspapers are sold in Town S than in Town T. Therefore, the citizens of Town S are better informed about major world events than are the citizens of Town T.

Each of the following, if true, weakens the conclusion above EXCEPT:

(A) Town S has a larger population than Town T.

(B) Most citizens of Town T work in Town S and buy their newspapers there.

(C) The average citizen of Town S spends less time reading newspapers than does the average citizen of Town T.

(D) A weekly newspaper restricted to the coverage of local events is published in Town S.

(E) The average newsstand price of newspapers sold in Town S is lower than the average price of newspapers sold in Town T.

OA: E

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by ErikaPrepScholar » Thu Feb 22, 2018 11:14 am
We want to find the answer that DOESN'T weaken the conclusion that "The citizens of Town S are better informed about major world events that are the citizens of Town T." Any answers that do weaken this conclusion can be eliminated.

(A) Town S has a larger population than Town T.

If more people live in Town S than Town T, it makes sense that more newspapers would be sold there. Say there are 1000 people in Town S, of which 250 buy the newspaper, and 400 people in Town T, of which 200 buy the newspaper. More newspapers are bought in Town S, but only 25% of Town S buys the newspaper, while 50% of Town T buys the newspaper. Thus, the citizens in Town T could be more informed than the citizens of Town S, even while buying fewer newspapers. Eliminate.

(B) Most citizens of Town T work in Town S and buy their newspapers there.

This means that a bunch of the newspapers in Town S are being bought be citizens of Town T. It's possible then that more citizens of Town T read the newspaper than do citizens of Town S - they just buy it in Town S! This would mean that the citizens of Town T are likely at least as informed as (if not more informed than) the citizens of Town S. Eliminate.

(C) The average citizen of Town S spends less time reading newspapers than does the average citizen of Town T.

This means that even though more citizens are buying newspapers in Town S, they aren't reading them as much as the citizens of Town T! This means that the citizens of Town T are learning more from the newspapers, which is likely to make them more informed. Eliminate.

(D) A weekly newspaper restricted to the coverage of local events is published in Town S.

Remember: the question asks about being informed about major "world" events, not "local" events. The people buying local newspapers in Town S aren't learning anything about world events. If a large enough portion of the newspapers sold in Town S are these local newspapers, it's very possible that more people in Town T are reading newspapers concerned with world events than people in Town S are. This would make the citizens of Town T more informed. Eliminate.

(E) The average newsstand price of newspapers sold in Town S is lower than the average price of newspapers sold in Town T.

This could help explain why more newspapers are sold in Town S than in Town T - it's less of an expenditure. However, this doesn't tell us anything about how informed the citizens are. Even if people in Town S are getting their newspapers for less money, they're likely learning as much from them as the people spending more in Town T. So this doesn't impact our opinion of how informed the citizens in either town are. This is the correct answer.
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by ceilidh.erickson » Fri Feb 23, 2018 10:18 am
This is question #67 in OG 11. (Please cite your sources).

It's important to note that "each of the following weakens EXCEPT" does NOT mean "which one of the following strengthens." With WEAKEN EXCEPT questions, it's more likely that you'll have 4 weaken + 1 irrelevant than 4 weaken + 1 strengthen.

When you want to WEAKEN an argument, do not try to attack the conclusion directly. Instead, identify the MISSING pieces (the assumptions) that would be needed to connect the premise to the conclusion.

Premise: A greater number of newspapers are sold in Town S than in Town T.

Conclusion: citizens of Town S are better informed about major world events than are the citizens of Town T.

What's missing? What else would HAVE to be true for that conclusion to follow from that premise?
  • - does NUMBER of newspapers directly correlate to number of people reading them? What if people share newspapers with multiple people? Or buy more than one per person?
    - and does number of newspapers correlate to PERCENTAGE of citizens being informed? What if town S has more people? The same percentage of people buying newspapers would = a greater number.
    - are people actually reading the newspapers and absorbing the information? The fact that they're sold doesn't necessarily correlate to people getting the information.
    - do newspapers contain world events? The premise didn't say so. And if so, are people reading that part?
    - are newspapers being read by citizens of town S? They're being purchased there, but that doesn't necessarily mean they're read there.
    - are newspapers the only source of information about world events? What about tv, radio, etc?
In order to weaken the argument, we want to attack one of these missing assumptions.

(A) Town S has a larger population than Town T.
This attacks the assumption that number of newspapers is correlated with percentage of citizens informed. Larger population í a smaller percentage of citizens could buy newspapers but it could still be a greater number. This weakens.

(B) Most citizens of Town T work in Town S and buy their newspapers there.
This attacks the assumption that where a newspaper is bought = which citizens are informed. It's possible that newspapers sold in town S are informing citizens of town T, so the premise no longer leads to the conclusion. This weakens.

(C) The average citizen of Town S spends less time reading newspapers than does the average citizen of Town T.
This attacks the assumption that the fact that a newspaper was purchased gives us information about whether the reader is informed. Less time reading might mean less well informed. This weakens.

(D) A weekly newspaper restricted to the coverage of local events is published in Town S.
This attacks the assumption that newspapers always inform citizens about world events. It may be the case that many people bought this local-only newspaper, so we cannot conclude that more newspapers = better informed about the world. This weakens.

(E) The average newsstand price of newspapers sold in Town S is lower than the average price of newspapers sold in Town T.
This doesn't attack any of the assumptions that would have to be true for the conclusion to hold. It perhaps explains WHY more newspapers were sold in town S but doesn't give us any reason to doubt that more newspapers sold = citizens better informed. This is irrelevant.

The answer is E.


For more practice with WEAKEN EXCEPT, see:
https://www.beatthegmat.com/cr-support- ... tml#550195
Ceilidh Erickson
EdM in Mind, Brain, and Education
Harvard Graduate School of Education