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# Ellen: All three of Shirley's children have the measles!

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Director
Joined: 04 Oct 2005
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Location: Chicago
Ellen: All three of Shirley's children have the measles! [#permalink]

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14 Jan 2006, 15:40
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Ellen: All three of Shirley's children have the measles!

Lois: As a matter of fact, all three of Shirley's children are fine!

Accepting the assumption that nobody who has measles is fine, which of the following must be true about this exchange?

A) It is possible that both Ellen and Lois are right about Shirley's children.

B) It is possible that both Ellen and Lois are mistaken about Shirley's children.

C) Either Ellen is right about Shirley's children, or Lois is right about them, but they cannot both be right.

D) Ellen and Lois might both be right about Shirley's children, and they might both be wrong about them.

E) None of these alternatives correctly identifies a possibility for this scenario.

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CEO
Joined: 20 Nov 2005
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Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008

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14 Jan 2006, 17:30
Is it C??
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

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SVP
Joined: 28 Dec 2005
Posts: 1543

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14 Jan 2006, 22:07
i also think its C

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Director
Joined: 04 Oct 2005
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Location: Chicago

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15 Jan 2006, 00:14

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Current Student
Joined: 29 Jan 2005
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15 Jan 2006, 01:04
B?

What if the three kids just have a bad case of acne

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SVP
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15 Jan 2006, 01:13
GMATT73 wrote:
B?

What if the three kids just have a bad case of acne

Very much true

'B' looks fine.

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SVP
Joined: 16 Oct 2003
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15 Jan 2006, 01:23
B.

What if both are wrong. B here is C+1

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Director
Joined: 04 Oct 2005
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Location: Chicago

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15 Jan 2006, 02:24
Bhai:
Can u explain this part...
How can both be wrong??

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Director
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15 Jan 2006, 15:47
sounds like b..

what is OA

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SVP
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15 Jan 2006, 20:18
andy_gr8 wrote:
Bhai:
Can u explain this part...
How can both be wrong??

Given the information, may be they have some other disease. So measles is out of question and they may not be fine.

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Senior Manager
Joined: 13 Jun 2005
Posts: 252

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Location: Haverhill, MA

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15 Jan 2006, 21:15
But isn't that out of the scope of the stimulus.

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Manager
Joined: 18 Dec 2005
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15 Jan 2006, 21:38
andy_gr8 wrote:
Ellen: All three of Shirley's children have the measles!

Lois: As a matter of fact, all three of Shirley's children are fine!

Accepting the assumption that nobody who has measles is fine, which of the following must be true about this exchange?

A) It is possible that both Ellen and Lois are right about Shirley's children.

B) It is possible that both Ellen and Lois are mistaken about Shirley's children.

C) Either Ellen is right about Shirley's children, or Lois is right about them, but they cannot both be right.

D) Ellen and Lois might both be right about Shirley's children, and they might both be wrong about them.

E) None of these alternatives correctly identifies a possibility for this scenario.

It is B because it is possible that one or two of the children have measles, and incorrect interpretation of information on both sides leads to the argument.

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Director
Joined: 04 Oct 2005
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Location: Chicago

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15 Jan 2006, 21:48
OA is B..Here;s the OE

(B) These two statements are called 'contraries.' That is, they cannot both be true, but they can both be false. The latter would valid if, for example, two of Shirley's children had measles and the third one was fine. But no combination of illness and health in Shirley's children will allow both Ellen and Louis's statements to be true. (C) is incorrect because there is no reason why either one of them has to be correct? Both Ellen and Shirley could be wrong. We apologize for no making that clear in the explanation

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Director
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Location: Munich,Germany

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20 Jan 2006, 04:01
whoa I nailed B !

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SVP
Joined: 16 Oct 2003
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20 Jan 2006, 15:25
andy_gr8 wrote:
We apologize for no making that clear in the explanation

What? Well then

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20 Jan 2006, 15:25
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# Ellen: All three of Shirley's children have the measles!

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