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Re: Anders: The physical structure of the brain plays an important role in [#permalink]
I agree with A.
studies of the physical structure of birds provided information crucial to the
development of workable aircraft
=> Studies of structure of the brain will be crucial to the development of thinking machines.
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Re: Anders: The physical structure of the brain plays an important role in [#permalink]
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I also agree with A...we can clearly show that structure is important through this answer
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Re: Anders: The physical structure of the brain plays an important role in [#permalink]
A. studies of the physical structure of birds provided information crucial to the
development of workable aircraft

Yang says that while developing thinking machines they should consider only functions and ignore physical structure.

if physical structure of birds is crucial to the development of workable aircraft then his argument becomes invalid

so ans A is essential in evaluating that argument
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Re: Anders: The physical structure of the brain plays an important role in [#permalink]
I counter for the idea that answer is (A).

Because the premise of Yang is

(1)."No Flying machine closely modeled on birds has worked."

(2)."Workable aircraft are structurally very different from birds."


When the above two premises have been quoted in the Yang's argument and we also know that in GMAT CR we take premises as true and never doubt them.

Answer choice (A). doubts the above mentioned premises.

Plz Advice


Rgds,
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Re: Anders: The physical structure of the brain plays an important role in [#permalink]
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GENERAL METHOD:

This is Evaluate The Argument question. If you ask the good question, the argument could be seen as strong or weak. So, the strategy to pick the correct answer is "Variance test". The Variance Test consists of supplying two opposite responses to the question. If different responses produce different effects ==> The answer choice is correct (Power Score CR Bible).

APPLY:

Anders: computers that closely model the structure of the brain will work.
Yang: no flying machine closely modeled on birds has worked; workable aircraft are structurally very different from birds.
Yang's conclusion: researchers would therefore increase their chances of success if they focus on the brain’s function and simply ignore its physical structure.

A. whether studies of the physical structure of birds provided information crucial to the development of workable aircraft?
If YES, Yang's conclusion FAILS because studies of physical structure do help.
If NO, Yang's conclusion is CORRECT because studies of physical structure do not help anything.
==> A is correct choice.


B. Whether researchers currently working on thinking machines take all thinking to involve both common sense and factual knowledge?
"YES" or "NO" does not matter, because B doesn't say anything about physical structure that is the point we want to attack.

C. Whether as much time has been spent trying to develop a workable thinking machine as had been spent in developing the first workable aircraft?
"YES" or "NO" does not matter, because C talks about time ==> out of scope.

D. Whether researchers who specialize in the structure of the brain are among those who are trying to develop thinking machines
"YES" or "NO" does not matter. The point we want to evaluate here is: does physical structure help?. So, D is clearly out.

E. Whether some flying machines that were not closely modeled on birds failed to work
Shell game.
"YES" or "NO" does not matter. Because "some" does not mean "All". So, maybe some flying machines that WERE / WERE NOT modeled on bird MAY work. We can't say Yang's conclusion is right or wrong.

Hope it helps.
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Re: Anders: The physical structure of the brain plays an important role in [#permalink]
Great question. Understanding of the argument is very important. Answer choices are not that confusing.
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Re: Anders: The physical structure of the brain plays an important role in [#permalink]
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