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General questions relating to LSAT Logical Reasoning.
 MichaelJAG
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#19598
Dear PowerScore,

I have an extremely difficult problem with recognizing conditional statements in actual LSAT problems. I do excellent on the homework assignments, the Logical Reasoning exercises from the Logical Reasoning Workbooks, yet it seems that I am looking at totally different material, when I complete actual LSAT problems. I cannot see the conditional statements at all; however, I do recognize my errors after I read the PowerScore explanations. Nevertheless, the new information from the explanations seem to never carry over to the next problem. I understand the concepts behind conditional reasoning, but I frankly suck when it comes to actual practice with real LSAT problems. What can I do to resolve this issue :-? ? Thank-you

Regards,

Michael
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 Dave Killoran
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#19610
Hi Michael,

Thanks for the questions! The problems you are having are actually pretty standard, and ones that fortunately aren't too difficult to fix. So, I feel like with some work, you can get this corrected. Here are a few points that might help:

First, I'm all for understanding the theory behind concepts, and ultimately that is what will really make something click. With conditionality it's tough at first to use all the conceptual knowledge simply because there's so much of it. It creates a mental logjam when you are first working with these problems. The way to get around that is in the beginning to go on a sort of autopilot, and to do that, you need to first memorize the conditional indicators (the lists with "if," "then," "all," "every," etc). Why? Because although the definitions of conditionality will help you recognize when it is present (especially in the harder problems), at first when you are trying to recognize it in a sentence it is all about the language. There is almost always some type of indicator or logical formation present that tips you off as to which condition is sufficient and which is necessary. So at first, you need to be a robot that simply recognizes the terms and processes the conditions. If you see an "all," for example, you know that introduces a sufficient condition and you can proceed from there. That allows you to go quickly and at the same time reduces the chances of error.

Second, one thing to avoid is trying to figure each relationship out based on what you know of the real world when you read each sentence. In the real world that works fine, but in the LSAT world that causes a lot of problems because LSAT speakers can make up ridiculous and nonsensical statements.

Here's an example I used in another post on this board:


..... Sentence: The sun rises only if I wake up in the morning.


If you reason this out using your understanding of the real world, you would probably make "sun rises" the necessary condition because it is ridiculous to think that the sun would depend on whether I woke up or not. However, I wouldn't even try to think about it that way during the exam. Instead, I'd see the term "only if," know that that introduces a "necessary" condition, and immediately realize that "I wake up" is necessary and thus that "sun rises" is sufficient, leading to the following diagram:


..... Sun rises :arrow: I wake up in the morning


That diagram and relationship is ridiculous from a real world standpoint, but, nonetheless, that is exactly what the author said in the sentence. And that's the key thing here: you aren't trying to figure out what things mean according to you or the real world, you are trying to figure out what the author said. Identifying indicators makes that much easier because you never have to try and determine what you think was said, you simply react based on the indicators that are used.

That's a start, but it will definitely help you recognize when these relationships are present. And, you have to be able to do it until it becomes second nature. It's like a flashcard: if I said to you, "every!" you should immediately say back, "sufficient!" If you hesitate, that translates into lost time on the test. So, for every term, it should be nearly instantaneous. The good news is that although it's a bit of work at first, eventually you get so that you don't even think about it, and you react quickly and smoothly when you encounter those terms. It's at that point that we start moving into more difficult problems where they don't use indicators or where the indicators are confusing. But we'll worry about those after we get the basics down.

Please let me know if that helps, and please keep me posted on your progress. Thanks and good luck!

Dave
 MichaelJAG
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#19618
Thank-you for the reply. The information about the indicator words seriously helped me a lot with understanding the correct answer for previous problems. However, I am still having trouble with understanding why a certain answer choice is correct and another is incorrect. I will use #10 and #11 from Lesson 2HW.

#10 If I am not mistaken, then the fourth sentence states: OC :arrow: S, and the contrapositive is Not S :arrow: Not OC. Is that not exactly what answer choice A states? Why is that the incorrect answer? I do not know how to diagram the sentences in the stimulus to produce answer choice D: PHJ :arrow: PMI.

#11 BESS :arrow: Not PFY. Not BEPFY :arrow: BESS. Contrapositive: Not BESS :arrow: BEPFY :arrow: Not BESS. Is this not the same thing as saying A :arrow: B :arrow: A; therefore, A :arrow: A? How is this not circular logic? Why is answer choice A incorrect?

I memorized those seventeen words like holy script, yet I am still missing the problems.
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 Dave Killoran
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#19624
Hi Michael,

Thanks for the reply! Ok, so really what we're looking at is a different issue than recognizing when conditionality is present. You are able to do that; it's that certain problems then don't make a whole lot of sense, right? That's also fixable, and it comes down to a lot more practice and then analysis of these problems. And, what you want to do is carefully deconstruct problems like the two you mentioned. This will add to your overall knowledge of conditional reasoning, and that will slowly but steadily start to make these questions clearer.

Let me first address #10. This question has come up on the forum previously, so I'm going to link to those answers in the hope it will help. Then I'll respond to #11 in a separate reply. So, please check these out and let me know if they successfully explain the relationships you are seeing and the reasoning behind the correct answer choice:

I'll post a reply on #11 shortly. Thanks!
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 Dave Killoran
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#19628
Ok, on to #11. This question is a personal favorite of mine, so let's break it down:

  • First sentence: Switch SuppliersBE :arrow: Profit

    Second sentence: Profit :arrow: Switch SuppliersBE
When you look at that, it's a classic Mistaken Reversal. Now, compare that to answer choice (A)—does the conclusion that "merely paraphrase that claim [the one made in the first sentence]?" No, it's not a paraphrase, it's stated in different terms where what was previously the necessary condition is now stated as the sufficient, and what was previously the sufficient condition is now stated as the necessary.

With time, this will get easier, because you'll get used to how they describe errors of conditional reasoning (very, very rarely would you see "circular reasoning" used in conjunction with conditionality in a correct answer).

Ultimately, you did pretty well with recognizing the conditionality here (the section where you state "BESS :arrow: Not PFY. Not BEPFY :arrow: BESS" is pretty much correct; you ran into some problems with the contrapositives though). Where you ran into issues here was understanding how they described that error. That's great news because the difficulty you had here isn't what you thought, and this is the kind of stuff that you will learn and get better at.

Finally, the question stem is a Flaw in the Reasoning (which also appears in #9 of this problem set). This is interesting because at this point in the lesson stream, you haven't covered these questions yet. But, we wanted to give you an early opportunity to see how the test makers describe errors of conditional reasoning. This form of previewing is a consistent feature within our lessons. It does cause some missed questions, but missing questions in practice isn't a big deal. What's important is that you learn from each question. this is especially the case here because these questions have you worried. So, look closely at their language (and the language they use in the other Flaw problems in this set).

Side question—have you checked out the online explanations of these problems in your Online student Center? I feel like the one for this problem might have helped.

Please let me know if that helps. Thanks!
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 Dave Killoran
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#19652
Hi michael,

Just fyi, I split off your most recent post in this thread into a new thread over in the L2HW forum. It's at: http://forum.powerscore.com/lsat/viewto ... =28&t=7624

Once we answer the original questions, we usually move posts about other questions into their own threads so they are easier to find for other students :-D

Thanks!

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