Babies who can hear and have hearing parents who expose them : GMAT Critical Reasoning (CR)
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Babies who can hear and have hearing parents who expose them

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New post 26 Nov 2005, 07:24
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A
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Babies who can hear and have hearing parents who expose them to speech begin to babble at a certain age as a precursor to speaking. In the same way, deaf babies with deaf parents who communicate with them and with each other by signing begin to babble in signs at the same age. That is, they make repetitive hand gestures that constitute, within the language system of signs, the analogue of repeated syllables in speech.

The information above, if accurate, can best be used as evidence against which one of the following hypotheses?
(A) Names of persons or things are the simplest words in a language, since babies use them before using the names of actions or processes.
(B) The development of language competency in babies depends primarily on the physical maturation of the vocal tract, a process that requires speech-oriented vocal activity.
(C) In the absence of adults who communicate with each other in their presence, babies develop idiosyncratic languages.
(D) In babbling, babies are unaware that the sound or gesture combinations they use can be employed in a purposive way.
(E) The making of hand gestures by hearing babies who have hearing parents
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New post 26 Nov 2005, 07:56
C.

though not logically deductive.

hearing parents communication -> babies babbling
deaf parents sign communication -> babies balling in signs

no parents????
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New post 26 Nov 2005, 11:34
i got C as well.
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New post 26 Nov 2005, 13:03
duttsit wrote:
C.

though not logically deductive.

hearing parents communication -> babies babbling
deaf parents sign communication -> babies balling in signs

no parents????


Why not B?

The development of language competency in babies depends primarily on the physical maturation of the vocal tract

No it does not, it depends primarily if parents communicate with you.
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New post 27 Nov 2005, 16:58
I choose B!
B says that development of language competency requires vocal activity.
The passages says otherwise - signs are considered a language and thus vocal activity is not a pre-requisite!
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New post 27 Nov 2005, 23:19
I vote for B.

A - Out of Scope.
B - Correct. 'coz it states that for development of language depends primarly upon vocal tract
C - Is it? But the arg cannot be used as the evidence.
D - Maybe true. But the arg cannot be used as the evidence.
E - The arg cannot be used as the evidence.

Hence B.
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New post 28 Nov 2005, 01:39
I vote for 'B'
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New post 28 Nov 2005, 08:03
OA is B.
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New post 28 Nov 2005, 10:34
I also got C but B is much better.
  [#permalink] 28 Nov 2005, 10:34
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