ranjeet75 wrote:
I still could not understand why A is the OA.
Also no option is looking good to answer. Experts, pl provide explanation.
What is the source of the ques
Because I see there's no clear answer for this question, so I want share my thought (I'm sorry I'm not CR expert). Hope it will help.
GENERAL METHOD:This question is
Flaw in the Reasoning question that is considered the most difficult question in GMAT. Flaw questions
appear infrequently in GMAT. If you see this kind of question, that would be a signal you are doing very well on the GMAT.
The technique used in Flaw question is Prephrasing and Fact test. Keep in mind that answers provide "new information" always be considered wrong.
APPLY:Now, I will prephrase the stimulus as follows:
Why eating Pretzel makes cavity? Because Pretzel contacts with teeth.
There must be a correlation between Pretzel and teeth. KEY
Why eating Caramel makes cavity? Because Caramel contacts with teeth.
There must be a correlation between Caramel and teeth. KEY
If No, there's no cavity
The longer the correlations remains, the greater the likelihood that a cavity will result.
Author concludes: the correlation between Caramel & teeth lasts shorter than that between Pretzel and teeth >>>> the less likelihood that a cavity will result.
I bet you see THE GAP.
The correlation between Caramel & teeth is DIFFERENT from the correlation between Pretzel & teeth. We cannot say "this is true for X also true for Y". This is wrong assumption.
What A says: "treats a correlation that
holds within individual categories as thereby
holding across categories as well".
KEY WORD: "holds within & holding across"It means: Author treats a correlation between Caramel & teeth and a correlation between Pretzel & teeth the same, and thereby makes a conclusion.
A clearly shows the flaw in author's reasoning.
Takeaway:Flaw questions appear infrequently in GMAT. If you see this kind of question, that would be a signal you are doing very well on the GMAT.
The technique used in Flaw question is Prephrasing & Fact Test.
Hope my post helps you a little bit.
Regards.