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# Dr. A: The new influenza vaccine is useless at best and

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Dr. A: The new influenza vaccine is useless at best and [#permalink]

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25 Jul 2008, 04:12
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27% (02:14) correct 73% (01:27) wrong based on 1194 sessions

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Dr. A: The new influenza vaccine is useless at best and possibly dangerous. I would never use it on a patient.
Dr. B: But three studies published in the Journal of Medical Associates have rated that vaccine as unusually effective.
Dr. A: The studies must have been faulty because the vaccine is worthless.

In which of the following is the reasoning most similar to that of Dr. A?

(A) Three of my patients have been harmed by that vaccine during the past three weeks, so the vaccine is unsafe.
(B) Jerrold Jersey recommends this milk, and I don’t trust Jerrold Jersey, so I won’t buy this milk.
(C) Wingzz tennis balls perform best because they are far more effective than any other tennis balls.
(D) I’m buying Vim Vitamins. Doctors recommend them more often than they recommend any other vitamins, so Vim Vitamins must be good.
(E) Since University of Muldoon graduates score about 20 percent higher than average on the GMAT, Sheila Lee, a University of Muldoon graduate, will score about 20 percent higher than average when she takes the GMAT.

Any opinoins?

Can someone guide me with general logic/checkpoints to tackle such questions? 90% of time I select wrong solution

Thanks
[Reveal] Spoiler: OA
If you have any questions
New!
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25 Jul 2008, 05:17
sjgmat wrote:
Dr. A: The new influenza vaccine is useless at best and possibly dangerous. I would never use it on a patient. Dr. B: But three studies published in the Journal of Medical Associates have rated that vaccine as unusually effective. Dr. A: The studies must have been faulty because the vaccine is worthless. In which of the following is the reasoning most similar to that of Dr. A?

(A) Three of my patients have been harmed by that vaccine during the past three weeks, so the vaccine is unsafe.
(B) Jerrold Jersey recommends this milk, and I don’t trust Jerrold Jersey, so I won’t buy this milk.
(C) Wingzz tennis balls perform best because they are far more effective than any other tennis balls.
(D) I’m buying Vim Vitamins. Doctors recommend them more often than they recommend any other vitamins, so Vim Vitamins must be good.
(E) Since University of Muldoon graduates score about 20 percent higher than average on the GMAT, Sheila Lee, a University of Muldoon graduate, will score about 20 percent higher than average when she takes the GMAT.

Any opinoins?

Can someone guide me with general logic/checkpoints to tackle such questions? 90% of time I select wrong solution

Thanks

Hello sjgmat,

I'm not good at CR. But i will try and go with B.
Because of the five, only B seems to have the same logic as the Dr A's behavior. In B, i'm not buying the milk just because i don't trust Jerrold Jersey.
A is not similar to Dr A position
C out because it's just a general statement
D contradicts Dr A's behavior because i'm following the recommendation of doctors
E out!
What is the OA?
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25 Jul 2008, 05:24
Even I selected B but was wrong.

will post the OA soon, lets wait for some more replies

Thanks
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25 Jul 2008, 05:32
sjgmat wrote:
Even I selected B but was wrong.

will post the OA soon, lets wait for some more replies

Thanks

Ok
Then let's wait for the explanations (seems to be E then but i don't see the similarity yet!)
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25 Jul 2008, 06:00
i think its E

Dr A's argument is that a test is flawed because the results are not as per expectation. Same is stated in E, but in the exactly opposite way - Test result is guaranteed because of the college factor... Looks like the best choice to me... am i clear?
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25 Jul 2008, 09:51
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sjgmat wrote:
Dr. A: The new influenza vaccine is useless at best and possibly dangerous. I would never use it on a patient. Dr. B: But three studies published in the Journal of Medical Associates have rated that vaccine as unusually effective. Dr. A: The studies must have been faulty because the vaccine is worthless. In which of the following is the reasoning most similar to that of Dr. A?

(A) Three of my patients have been harmed by that vaccine during the past three weeks, so the vaccine is unsafe.
(B) Jerrold Jersey recommends this milk, and I don’t trust Jerrold Jersey, so I won’t buy this milk.
(C) Wingzz tennis balls perform best because they are far more effective than any other tennis balls.
(D) I’m buying Vim Vitamins. Doctors recommend them more often than they recommend any other vitamins, so Vim Vitamins must be good.
(E) Since University of Muldoon graduates score about 20 percent higher than average on the GMAT, Sheila Lee, a University of Muldoon graduate, will score about 20 percent higher than average when she takes the GMAT.

Any opinoins?

Can someone guide me with general logic/checkpoints to tackle such questions? 90% of time I select wrong solution

Thanks

C

Dr A says the vaccine is useless without giving reasons why it is useless.

In C - its stated tennis balls are best without giving reasons
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25 Jul 2008, 10:24
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sjgmat wrote:
Dr. A: The new influenza vaccine is useless at best and possibly dangerous. I would never use it on a patient. Dr. B: But three studies published in the Journal of Medical Associates have rated that vaccine as unusually effective. Dr. A: The studies must have been faulty because the vaccine is worthless. In which of the following is the reasoning most similar to that of Dr. A?

(A) Three of my patients have been harmed by that vaccine during the past three weeks, so the vaccine is unsafe.
(B) Jerrold Jersey recommends this milk, and I don’t trust Jerrold Jersey, so I won’t buy this milk.
(C) Wingzz tennis balls perform best because they are far more effective than any other tennis balls.
(D) I’m buying Vim Vitamins. Doctors recommend them more often than they recommend any other vitamins, so Vim Vitamins must be good.
(E) Since University of Muldoon graduates score about 20 percent higher than average on the GMAT, Sheila Lee, a University of Muldoon graduate, will score about 20 percent higher than average when she takes the GMAT.

Any opinoins?

Can someone guide me with general logic/checkpoints to tackle such questions? 90% of time I select wrong solution

Thanks

Answer is C. The stimulus shows circular reasoning.

A: I think the vaccine is bad.
B: The vaccine is not bad because of these data.
A: The data must be wrong, because the vaccine is bad.

C also shows circular reasoning:
Wingzz tennis balls are the best because they are the best.
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25 Jul 2008, 10:27
goalsnr wrote:
sjgmat wrote:
Dr. A: The new influenza vaccine is useless at best and possibly dangerous. I would never use it on a patient. Dr. B: But three studies published in the Journal of Medical Associates have rated that vaccine as unusually effective. Dr. A: The studies must have been faulty because the vaccine is worthless. In which of the following is the reasoning most similar to that of Dr. A?

(A) Three of my patients have been harmed by that vaccine during the past three weeks, so the vaccine is unsafe.
(B) Jerrold Jersey recommends this milk, and I don’t trust Jerrold Jersey, so I won’t buy this milk.
(C) Wingzz tennis balls perform best because they are far more effective than any other tennis balls.
(D) I’m buying Vim Vitamins. Doctors recommend them more often than they recommend any other vitamins, so Vim Vitamins must be good.
(E) Since University of Muldoon graduates score about 20 percent higher than average on the GMAT, Sheila Lee, a University of Muldoon graduate, will score about 20 percent higher than average when she takes the GMAT.

Any opinoins?

Can someone guide me with general logic/checkpoints to tackle such questions? 90% of time I select wrong solution

Thanks

C

Dr A says the vaccine is useless without giving reasons why it is useless.

In C - its stated tennis balls are best without giving reasons

Also in B Dr A refuse to trust on medical journal report without giving any reasons..
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25 Jul 2008, 11:13
Another one for C - circular reasoning.
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25 Jul 2008, 12:45
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zoinnk wrote:
sjgmat wrote:
Dr. A: The new influenza vaccine is useless at best and possibly dangerous. I would never use it on a patient. Dr. B: But three studies published in the Journal of Medical Associates have rated that vaccine as unusually effective. Dr. A: The studies must have been faulty because the vaccine is worthless. In which of the following is the reasoning most similar to that of Dr. A?

(A) Three of my patients have been harmed by that vaccine during the past three weeks, so the vaccine is unsafe.
(B) Jerrold Jersey recommends this milk, and I don’t trust Jerrold Jersey, so I won’t buy this milk.
(C) Wingzz tennis balls perform best because they are far more effective than any other tennis balls.
(D) I’m buying Vim Vitamins. Doctors recommend them more often than they recommend any other vitamins, so Vim Vitamins must be good.
(E) Since University of Muldoon graduates score about 20 percent higher than average on the GMAT, Sheila Lee, a University of Muldoon graduate, will score about 20 percent higher than average when she takes the GMAT.

Any opinoins?

Can someone guide me with general logic/checkpoints to tackle such questions? 90% of time I select wrong solution

Thanks

Answer is C. The stimulus shows circular reasoning.

A: I think the vaccine is bad.
B: The vaccine is not bad because of these data.
A: The data must be wrong, because the vaccine is bad.

C also shows circular reasoning:
Wingzz tennis balls are the best because they are the best.

good one..
Agree with you..
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25 Jul 2008, 22:09
Clearly C as no reason has been provided atleast in the question.
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26 Jul 2008, 01:18
C for me too
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26 Jul 2008, 07:33
OA is C

Thanks everyone
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02 Sep 2008, 12:25
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sjgmat wrote:
Dr. A: The new influenza vaccine is useless at best and possibly dangerous. I would never use it on a patient. Dr. B: But three studies published in the Journal of Medical Associates have rated that vaccine as unusually effective. Dr. A: The studies must have been faulty because the vaccine is worthless. In which of the following is the reasoning most similar to that of Dr. A?

(A) Three of my patients have been harmed by that vaccine during the past three weeks, so the vaccine is unsafe.
(B) Jerrold Jersey recommends this milk, and I don’t trust Jerrold Jersey, so I won’t buy this milk.
(C) Wingzz tennis balls perform best because they are far more effective than any other tennis balls.
(D) I’m buying Vim Vitamins. Doctors recommend them more often than they recommend any other vitamins, so Vim Vitamins must be good.
(E) Since University of Muldoon graduates score about 20 percent higher than average on the GMAT, Sheila Lee, a University of Muldoon graduate, will score about 20 percent higher than average when she takes the GMAT.

Info from the text: “The vaccine is useless” because “the vaccine is worthless” i.e. no reason is given

A) “The vaccine is unsafe” because “three patients have been harmed” some sort of reasoning is present

B) JJ recommends this milk BUT SINCE i don’t trust this ninja i won’t buy this milk – a reason is there: this ninja is not trustworthy source for info

C) WingzZ balls perform better because they are “far more effective than others” i.e. better. So WingzZ get to perform Better because they are Better.

D) I buy VVs because doctor recommends them more often because blah blah -- I bought a Yugo car because my best friend recommended it.

E) Reason is given

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13 Oct 2010, 11:24
I also got it wrong.Good one.
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13 Oct 2010, 13:32
Good Q. I never considered circular reasoning.
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13 Oct 2010, 14:07
Difficult to spot, but I like circular reasoning questions.
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13 Oct 2010, 22:09
I have no clue..I would guess with B probably..Can someone explain?
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14 Oct 2010, 00:50
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this is circular reasoning, i.e., someone is stating something is effective because he thinks it's effective. That someone didn't mention why it's good or effective, and his only reasoning for it is because he thinks it's good. In this questions we need to look for reasoning similar to that. In C there is no mentioning why he thinks the balls are good; he just thinks they are effective.
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14 Oct 2010, 01:01
I picked B, but came to know B is wrong.
Re: CR: Vaccine   [#permalink] 14 Oct 2010, 01:01

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