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# Rare Question Type: Similar Flawed Pattern of Reasoning

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Joined: 18 Aug 2013
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Rare Question Type: Similar Flawed Pattern of Reasoning [#permalink]

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25 Aug 2013, 11:04
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Hello,

I was wondering if anyone has come across a question type that asks for a similar flaw in reasoning to the argument given. I do not recall coming across any of these types of questions in the OG13; however, when taking Manhattan's practice CAT I got one. I'm also using old LSAT tests to prepare for CR and RC, and I have found a few in there. Should I prepare for these types of questions? And if so, does anyone have any advice on how to attack them? I've struggled with the few I've encountered. Currently, my strategy is to write out the argument in variables (i.e. x--->y, y---->z, conclusion: no z, no x, flaw: backwards thinking) and then try and extrapolate to the answer choices, but this process is long and innacruate.

Here's an example of the question type.

The trees always blossom in May if April rainfall exceeds 5 centimeters. If April rainfall exceeds 5 centimeters, then the reservoirs are always full on May 1. The reservoirs were not full this May 1 and thus the trees will not blossom this May.

Which one of the following exhibits a flawed pattern of reasoning most similar to the flawed pattern of reasoning in the argument above?

(A) If the garlic is in the pantry, then it is still fresh. And the potatoes are on the basement stairs if the garlic is in the pantry. The potatoes are not on the basement stairs, so the garlic is not still fresh.

(B) The jar reaches optimal temperature if it is held over the burner for 2 minutes. The contents the jar liquefy immediately if the jar is at optimal temperature. The jar jar was held over the burner for 2 minutes, so the contents of the jar must have liquefied immediately.

(c) A book is classified "special" if it is more than 200 years old. If a book was set with wooden type, then it is more than 200 years old. This book is not classified "special," so it is not printed with wooden type.

(D) The mower will operate only if the engine is not flooded. The engine is flooded if the foot pedal is depressed. The foot pedal is not depressed, so the mower will operate.

(E) If the kiln is too hot, then the plates will crack. If the plates crack, then the artisan must redo the order. The artisan need not redo the order. Thus, the kiln was not too hot.

[Reveal] Spoiler:
A

Thanks!
If you have any questions
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Re: Rare Question Type: Similar Flawed Pattern of Reasoning [#permalink]

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25 Aug 2013, 16:31
No, this is an unusual GMAT question. It's likely that the probability of such a question is <1%. In our experience, we haven't seen this type of CR question on the GMAT -- where the answer choice is another example. It's almost always the case where the answer choice is directly related to the question stem.

There are bold-faced/structure type questions (~10%) but these do not usually introduce new "patterns of reasoning" or new "topics" -- instead you'll typically be asked what statement would "weaken" the above argument.
Re: Rare Question Type: Similar Flawed Pattern of Reasoning   [#permalink] 25 Aug 2013, 16:31
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