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A new species of fish has just been discovered living in

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Re: A new species of fish has just been discovered living in gre [#permalink]

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New post 14 Aug 2017, 13:16
habdo wrote:
So what is the OA? I believe A also makes sense since to be classified as either shark or eel, it should cover all the characteristics!
Please justify


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Hi Habdo,

The OA is (D) because it is the only 100% provable statement made.
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Re: A new species of fish has just been discovered living in [#permalink]

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New post 16 Aug 2017, 19:44
daviesj wrote:
A new species of fish has just been discovered living in great numbers in the waters off Papua New Guinea. The fish exhibits some characteristics belonging to sharks, such as a cartilaginous skeleton. However, the fish also exhibits characteristics belonging to eels, such as a long, snake-like body. Because of the habitat where it was found and its obviously eel-like body, almost all scientists believe that the fish is an eel. But the cartilaginous skeleton puzzles them, since no known eel possesses one. So scientists are still unsure as to the fish's precise classification, but they agreed immediately that the most logical classification would be as either a shark or an eel.

The statements above, if true, most strongly support which of the following?

A.To be placed into a certain classification, a fish must possess all the characteristics of that classification. no because, for example, if the scientists do end up placing the fish into a category then the fish would evidently not have all the characteristics of that classification
B.Physical characteristics, such as skeletons, are scientists' primary means of classifying new species. if this where the case then the new fish's environment would be unimportant in determining its classification
C.Some fish with cartilaginous skeletons are not sharks. well what if the fish discovered was a shark?
D.The waters off Papua New Guinea are generally hospitable to eels. this is subtly yet explicitly supported " because of the habitat where it was found...almost all scientists believe that the fish is an eel"
E.A fish cannot be both a shark and an eel. this is an inference question- what in the passage supports this- this is perhaps a conclusion that could be drawn but not something that's explicitly supported

[Reveal] Spoiler: OA
D


High level inference questions can be tricky because sometimes the answer is just based on a subtle fact in the passage.

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Re: A new species of fish has just been discovered living in [#permalink]

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New post 22 Sep 2017, 09:43
this is truly one of the most difficult gmat questions for free so far.
The passage is long and complex. The deduction is also funny.
A is too extreme.
B is wrong.
C is not mentioned in the passage.

Only D and E are left.
It is hard to explain the logic of deductions, but E is not the answer. "the most logical classification" does not mean "the classification must be either shark or eel"
Re: A new species of fish has just been discovered living in   [#permalink] 22 Sep 2017, 09:43

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