Ellen: All three of Shirley's children have the measles! : GMAT Critical Reasoning (CR)
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# Ellen: All three of Shirley's children have the measles!

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

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16 Dec 2003, 04:30
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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

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 the possibilities
for this scenario
If you have any questions
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16 Dec 2003, 05:14
I have more inclination towards B than E,

cause it is possible that someone is not fine even if he does not have measles. All we know is that one with measles can not be fine.
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16 Dec 2003, 06:27
E...what if they are both talking about different Shirleys? The question doesn't say it's the same one.
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16 Dec 2003, 06:45
Geethu wrote:
What is wrong with C ?

Assumption is that nobody who has measles is fine, but it does not say that one who has no measles is fine. If they have no measeles, but flue instead, both of them are wrong.
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17 Dec 2003, 08:46
I vote for E

Here is my explanation.

The assumption: nobody who has measles is fine

This assumption can be simplified as: If someone has measles, he/she is not fine.

Now let us say that Ellen's argument as right. That means let us accept that "All three of Shirley's children have the measles". This will lead to the conclusion that all the children are NOT FINE. So Lois is wrong in this instance.

Let us say that Ellen's argument is wrong. That means "All three of Shirley's children DO NOT have the measles" This will lead to the conclusion that the children are either FINE or NOT FINE. That means Lois is either right or wrong in this instance.

Looking at the answer choices, I think E is the best answer.
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17 Dec 2003, 08:54

If the children all have syphilis, they will neither have the measles, or be "fine".
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17 Dec 2003, 08:58
stoolfi wrote:

If the children all have syphilis, they will neither have the measles, or be "fine".

Stoofi

This fits into the senario I laid in the paragraph before the last line in my last post. In this instance Ellen is wrong, Lois can be RIGHT or WRONG.

This situation does not fit with B. Because, we need to find an answer choice that MUST BE TRUE as specified in the question.

What do you think?
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17 Dec 2003, 09:38
It must be true that "it's possible".

With the information we have it's possible that they're both wrong.

I see what you're saying, and the dispute comes from the vagueness that occurs when "must be true" and "it's possible" are used in the same problem. I think you have a case. I think I have a case. And I hope I never see a problem this ugly on the GMAT.
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17 Dec 2003, 09:52
stoolfi wrote:
It must be true that "it's possible".

With the information we have it's possible that they're both wrong.

I see what you're saying, and the dispute comes from the vagueness that occurs when "must be true" and "it's possible" are used in the same problem. I think you have a case. I think I have a case. And I hope I never see a problem this ugly on the GMAT.

I hear you. I went through the similar thinking about the use of "must be true" and "it is possible" in the same question. But then decided to ignore that thought.

On the other hand I considered B in the following way.

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

I reasoned that it is not the only possibility. It is also possible that Ellen could be WRONG and Lois could be RIGHT. (as I exaplined in my answer). So I reasoned that B is not always TRUE.

But as you said this could be open to debate. However, I feel that this is LSAT quality question. So I doubt whether we can dispute the wording of the questions. You know those Lawyers.. the will make the life of LSAT administrator miserble.
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Re: Ellen: All three of Shirley's children have the measles! [#permalink]

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14 Apr 2016, 03:11
I will go with E, I think it is the best answer here.
Re: Ellen: All three of Shirley's children have the measles!   [#permalink] 14 Apr 2016, 03:11
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