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 Administrator
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#26498
Complete Question Explanation

Question #12: Parallel Reasoning. The correct answer choice is (A)

The stimulus describes a dilemma. You have two competing objectives - to keep a confidence and answer questions truthfully. However, keeping one promise would effectively break the other. In other words, the objectives are mutually exclusive. On that basis, the author concludes that one cannot be expected to achieve both objectives simultaneously.

Answer choice (A) is the correct answer choice, as it provides a direct parallel to the idea discussed above: having a certain right (to say what we want) conflicts with an obligation (to civility). So, the two cannot be achieved simultaneously.

Answer choice (B) is incorrect, because neither the premises nor the conclusion match those in the stimulus. First, we don't have two competing objectives. Furthermore, the reasoning in this answer choice is conditional in ways that the original argument is not.

Answer choice (C) describes a Catch-22, a situation where you're damned if you do, damned if you don't. This is markedly different from the logic of the original argument, in which neither of the two courses of action have a negative outcome: their objectives couldn't be achieved simultaneously, but neither objective carried a particular downside.

Answer choice (D) is incorrect for the same exact reason as answer choice (B).

Answer choice (E) is attractive, but ultimately incorrect. Just like the original argument, it describes two courses of action that are incompatible with each other: both new employees and additional overtime would dramatically increase labor costs, which we apparently cannot afford to do. In contrast with the original argument, however, here the author concludes that we need to keep our business hours as they stand: in other words, neither course of action should be pursued. Compare this to the conclusion in the original argument, which held that both objectives cannot be achieved simultaneously (but perhaps either of them can be achieved without the other).

"Not both" is not the same as "neither." Compare the following two statements:
  • You cannot both go to law school and go to med school.
    You can neither go to law school nor go to med school.
The first claim simply means that the two options are mutually exclusive (law :dblline: med). This is the nature of the relationship in the stimulus. The second claim forbids the occurrence of either event. This is the case with answer choice (E).
 saranash1
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#9658
12. can you explain to me how we got the answer choice A?
 Steve Stein
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#9671
Hi,

It would be helpful to know your take on the question--how did you break down the stimulus, for example; did other answer choices look more appealing, or does the right answer not seem to reflect similar reasoning?

Let me know--thanks!

~Steve
 lsatstudent99966
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#108388
Administrator wrote: Fri Jan 21, 2011 12:00 am Complete Question Explanation

Answer choice (B) is incorrect, because neither the premises nor the conclusion match those in the stimulus. First, we don't have two competing objectives. Furthermore, the reasoning in this answer choice is conditional (the conclusion uses the contrapositive). No such parallels exist in the original argument.
Sorry, I accidentally submitted my previous post while previewing it. So I reposted with my full question.

I have no problem understanding that (B) is clearly wrong, as it does not match the structure of the stimulus at all.

However, I think the reasoning in answer choice (B) is probably not a contrapositive?

It seems more like an invalid transitivity to me?

"Any Politician needs to be popular"

Politician :arrow: Popular

"the only way for some politicians to be popular is to deceive."

Popular :some: deceive

"some politicains must deceive"

Politicians :some: deceive

So does this sound like an attempt to create an invalid transitive link? It couldn't be linked this way because there is a modifier "some" in the second link.

Can someone confirm whether I'm understanding this correctly? Thanks very much.
 Jon Denning
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#108691
This is an interesting one! First, I agree that there's not really a contrapositive in play here, so I edited out that part of the original explanation of (B). Good catch!

Let me see if I can help break down (B). I'll do this in part with some conditional-ish diagramming—which, as is often the case, I think actually over-complicates this if you rely solely on diagrams—and in part by just considering what's actually being said and how the logic of it fits together.

Here's one way you could diagram the first part of it.

..... Politicians :some: Popular :arrow: Promises :arrow: Deceive

Note that would get you to the idea that if politicians want/need to be popular, and some of them can only be popular by deceiving the people, then some politicians must deceive.

Or you could actually include the "some" as part of your first sufficient term by just combining "Politicians" and "Popular," like this:

..... Some Politicians Popular :arrow: Promises :arrow: Deceive

Again, we'd trigger that first condition ("Some Politicians Popular") by knowing that ALL politicians need to be popular: if popular is true of all of them, then it's for sure true for some of them, and away we go:

..... Some Politicians Popular :arrow: Deceive

I should point out that "Some Politicians Popular" includes "Some Politicians," so Some Politicians :arrow: Deceive is true.

I hope that helps!
 lsatstudent99966
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#108715
Jon Denning wrote: Fri Aug 30, 2024 3:43 pm This is an interesting one! First, I agree that there's not really a contrapositive in play here, so I edited out that part of the original explanation of (B). Good catch!

Let me see if I can help break down (B). I'll do this in part with some conditional-ish diagramming—which, as is often the case, I think actually over-complicates this if you rely solely on diagrams—and in part by just considering what's actually being said and how the logic of it fits together.

Here's one way you could diagram the first part of it.

..... Politicians :some: Popular :arrow: Promises :arrow: Deceive

Note that would get you to the idea that if politicians want/need to be popular, and some of them can only be popular by deceiving the people, then some politicians must deceive.

Or you could actually include the "some" as part of your first sufficient term by just combining "Politicians" and "Popular," like this:

..... Some Politicians Popular :arrow: Promises :arrow: Deceive

Again, we'd trigger that first condition ("Some Politicians Popular") by knowing that ALL politicians need to be popular: if popular is true of all of them, then it's for sure true for some of them, and away we go:

..... Some Politicians Popular :arrow: Deceive

I should point out that "Some Politicians Popular" includes "Some Politicians," so Some Politicians :arrow: Deceive is true.

I hope that helps!
Thank you so much John. It definitely helps!

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