Identical twins tend to have similar personalities; if : GMAT Critical Reasoning (CR)
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Identical twins tend to have similar personalities; if

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Identical twins tend to have similar personalities; if [#permalink]

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Identical twins tend to have similar personalities; if environment outweighs heredity in personality development, twins raised together should presumably have more similar personalities than those raised apart. A recent study of identical twins in both situations measured 11 key traits through a questionnaire, and concluded that 7 of the 11 are primarily products of heredity.

Which of the following, if established, would cast the most doubt on the study's results?

(A) Fewer than half of the pairs of twins studied were raised separately.
(B) The ages of all of the twins studied fell within a 10-year range.
(C) Some of the traits that the study attributed to heredity developed in the separately raised twins because those pairs all grew up in similar families.
(D) Although over half the traits measured were determined to be linked to heredity, the nature of those traits varied widely.
(E) The 11 traits that were measured constitute a representative sample of larger, generally accepted pool of key personality traits.
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New post 25 Apr 2006, 19:06
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Definitely C.

Study's results show that 7 traits are related to heridity and not the environment in which the twins were raised.
C directly weakens this argument by stating that some of the traits related to heredity developed b'coz twins were bought up in similar families, thus reinforcing that environment outweighs heredity.
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New post 26 Apr 2006, 00:35
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Go with C.
The question here is if "environment outweighs heredity".
C says environments are pretty much same. This goes against the conclusion.
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New post 26 Apr 2006, 10:47
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Has to be C.
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New post 26 Apr 2006, 17:37
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buzzgaurav wrote:
Definitely C.

Study's results show that 7 traits are related to heridity and not the environment in which the twins were raised.
C directly weakens this argument by stating that some of the traits related to heredity developed b'coz twins were bought up in similar families, thus reinforcing that environment outweighs heredity.


Agreed! C it is
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New post 26 Apr 2006, 17:43
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OA is C
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New post 26 Apr 2006, 18:00
Late but C!!!
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Re: CR: Twins [#permalink]

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New post 14 Jul 2008, 02:46
whats wrong with A
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New post 10 Aug 2010, 05:04
I chose A and I am wondering why that is wrong
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Re: CR: Twins [#permalink]

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New post 10 Aug 2010, 20:09
a) helping the argument's assumption
b) Not relevant so not helping or weakening
c) is weakening because the families are similar..watch towards the end of the sentence
d) Study's results is about the twin's behavior not the traits, so not relevant
e) It speaks about the traits which is not the conclusion of the argument

Answer is C
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New post 10 Aug 2010, 20:28
Anon wrote:
whats wrong with A


C it is.

A is wrong because the argument is focus on the "traits" of the twins not about the twins whether they are raised together or separately.

So let say even if there are only 4 out of 10 twins are raised separately, the result about the traits could still be accurate.
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New post 11 Aug 2010, 02:03
+1 for C

- Ravi
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Re: CR: Twins [#permalink]

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New post 11 Aug 2010, 03:30
The same: C
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New post 12 Aug 2010, 23:34
Its C.

C poses a doubt on the conclusion - 7 of the 11 are primarily products of heredity since it states that some traints developed because those pairs all grew up in similar families.
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Re: CR: Twins [#permalink]

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New post 18 Aug 2010, 01:49
C FOR ME
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Re: CR: Twins [#permalink]

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New post 19 Aug 2010, 08:05
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Conclusion --> twins are similar because of heredity.

C weakens the conclusion by showing that the key traits that were attributed to heredity were actually because of the environment.
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Re: CR: Twins [#permalink]

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New post 24 Aug 2010, 01:02
C @ 1:11..
Need to work on Timings !!!
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New post 24 Aug 2010, 01:15
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praveenism wrote:
C @ 1:11..
Need to work on Timings !!!


Then what do I need? :(

C @ 2:50
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Re: CR: Twins [#permalink]

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New post 25 Aug 2010, 09:29
C imo
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Re: CR: Twins [#permalink]

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New post 16 Oct 2010, 11:27
I choose e
Re: CR: Twins   [#permalink] 16 Oct 2010, 11:27

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