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Hi all,
I need some help with this question. i watched and read the explanations, and while i now understand how to eliminate the other choices, i still don't quite get why answer C is the necessary assumption. Here's how i broke down the passage --
Context: Some nuclear reactors are in geologically quiet region, which only has minor faults and lives far away from plates.
Premise: no minor fault in this region produces earthquake more than once in any 100000 year period. That means there is at least a 100000 year waiting period between earthquakes.
Conclusion: in this region, potential nuclear sites near a fault that produced an earthquake in living memory are least likely to be struck.
So i imagine that X is a nuclear site in a quiet region near a minor fault that produced an earthquake in living memory, say 100 years. From the premise, X will not be struck by another earthquake for at least 99900 years. That's pretty unlikely. But i need to compare it to other sites, so this is where the necessary assumptions come.
C: in this region, every potential nuclear site is near 1 or more minor fault.
The negation test means there is a nuclear site Y in this region that's not near any minor fault. But the passage says nothing about the frequency of earthquakes in areas without minor faults. For instance, if Y's area has earthquakes every year, even though there are no faults, X would be less likely to be struck than Y. But that means the conclusion still holds, failing the negation test.
Am i wrongly using the negation test for this question? Hopefully someone can explain my error here. Thanks a lot.
Admin Note: https://classic.7sage.com/lsat_explanations/lsat-17-section-2-question-21/
i still don't get the explanation for question 27.
The logic for answer B is not cohesive → difficult to examine all relevant options critically
Noncohesive groups appear in paragraph 1, which states not cohesive → compliance out of fear
But there is no mention of critical examination in the first paragraph. That only happens later in paragraphs 2 and 3, which discuss cohesiveness and groupthink, so they don't support B either.
Where can i find the missing assumption that compliance out of fear → difficult to examine all relevant options critically ?
Unfortunately, when i did this problem, i could not find any answer i liked and just ended up randomly guessing E before the time ran out.
Also, does 'antecedent' in the last sentence mean necessary condition?
#help