Preptest 48 Section 4 #21

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sdwarrior403

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Preptest 48 Section 4 #21

Postby sdwarrior403 » Sun Aug 19, 2012 10:33 pm

I have this one as:

IUR and TSL ---> ~SIN
SUC ---> T
----------------------------
SUC ---> ~IUR and ~TSL


Why did the LSAT have the conclusion's necessary condition be a condition that could never be logically inferred with the correct answer? I know its splitting hairs, but the T ---> SIN chain is only going to give us ~IUR or ~TSL. Is there a reason why this question has not been removed? Or have I misunderstood this one?

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sdwarrior403

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Re: Preptest 48 Section 4 #21

Postby sdwarrior403 » Mon Aug 20, 2012 5:46 pm

Thread was nearing the next page of threads so I bumped it.

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Liquox

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Re: Preptest 48 Section 4 #21

Postby Liquox » Mon Aug 20, 2012 6:17 pm

i don't think people know what you're talking about. try posting the actual question

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sdwarrior403

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Re: Preptest 48 Section 4 #21

Postby sdwarrior403 » Mon Aug 20, 2012 9:30 pm

I have given the question location. I cannot post the actual question due to there being a copyright.

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flippacious

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Re: Preptest 48 Section 4 #21

Postby flippacious » Mon Aug 20, 2012 9:49 pm

This question is tough because the "variables" are wordy and the first sentence throws in the word "requires" in a way that makes conditionality confusing. I definitely didn't think it fit together correctly when I did this section timed. I ended up with (A) because "trust" was the odd variable out, and (A) is the only answer choice that mentions trust.

Here's my breakdown of stimulus:

Sentence one = Sincerity requires no lies. S --> ~L
Sentence two = If do not trust, do not succeed. ~T --> ~Suc, or Suc --> T
Sentence three = Therefore, if succeed, then must not lie. Suc --> ~L

So, you have the conclusion: Suc --> ~L
How can we get there? If we add (A), which is trust requires sincerity, or T --> S, we can get:

Suc --> T --> S --> ~L

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sdwarrior403

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Re: Preptest 48 Section 4 #21

Postby sdwarrior403 » Mon Aug 20, 2012 9:58 pm

I agree with what you stated but is it not true that the test writers made a mistake with the and-or situation in the conclusion?

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sdwarrior403

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Re: Preptest 48 Section 4 #21

Postby sdwarrior403 » Tue Aug 21, 2012 10:19 pm

Bump for an answer. The quick and short of my trouble is that i feel this answer choice gives us a chain to use relevant evidence, but the evidence is going to lead us to an or statement while the conclusion is an and statement. This would mean that we really do not have an answer choice that proves the conclusion to be true.

VasaVasori

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.

Postby VasaVasori » Tue Aug 21, 2012 10:44 pm

.



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