It is currently 12 Dec 2017, 14:08

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

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

Author Message
Director
Joined: 10 Oct 2005
Posts: 524

Kudos [?]: 70 [0], given: 0

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

### Show Tags

23 Oct 2005, 22:13
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions

### HideShow timer Statistics

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 donâ€™t trust Jerrold Jersey, so I wonâ€™t buy this milk.
(C) Wingzz tennis balls perform best because they are far more effective than any other tennis balls.
(D) Iâ€™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.

Kudos [?]: 70 [0], given: 0

Manager
Joined: 10 Sep 2005
Posts: 162

Kudos [?]: 44 [0], given: 0

### Show Tags

24 Oct 2005, 01:24
B for me

Kudos [?]: 44 [0], given: 0

Manager
Joined: 07 Aug 2005
Posts: 102

Kudos [?]: 2 [0], given: 0

### Show Tags

24 Oct 2005, 01:32
B for me too.

Kudos [?]: 2 [0], given: 0

Senior Manager
Joined: 14 Apr 2005
Posts: 414

Kudos [?]: 18 [0], given: 0

Location: India, Chennai

### Show Tags

24 Oct 2005, 01:44
I think its B

Kudos [?]: 18 [0], given: 0

SVP
Joined: 14 Dec 2004
Posts: 1681

Kudos [?]: 172 [0], given: 0

### Show Tags

24 Oct 2005, 01:46
'B'

Kudos [?]: 172 [0], given: 0

Director
Joined: 10 Oct 2005
Posts: 524

Kudos [?]: 70 [0], given: 0

Location: US

### Show Tags

24 Oct 2005, 05:36
OA is C. Can someone explain please?

Kudos [?]: 70 [0], given: 0

Current Student
Joined: 29 Jan 2005
Posts: 5201

Kudos [?]: 439 [0], given: 0

### Show Tags

24 Oct 2005, 07:03
It has to be C. B is a trap answer. Was the doctor ever malinfluenced by another doctor? Not that we know of.

Kudos [?]: 439 [0], given: 0

Senior Manager
Joined: 11 May 2004
Posts: 453

Kudos [?]: 57 [0], given: 0

Location: New York

### Show Tags

24 Oct 2005, 09:10
I got C.

The stem uses circular reasoning to support the conclusion.
A says the vaccine is useless and dangerous. He goes on to say that the vaccine is worthless. He does not provide a reason why it is worthless/useless/dangerous.
We need to find a situation where the same reasoning is employed.

Only C does this. B is wrong because the same logic is not employed. The reasoning on not buying milk is based on the trust of the person selling the milk.

mahesh004 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 donâ€™t trust Jerrold Jersey, so I wonâ€™t buy this milk.
(C) Wingzz tennis balls perform best because they are far more effective than any other tennis balls.
(D) Iâ€™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.

Kudos [?]: 57 [0], given: 0

Director
Joined: 09 Jul 2005
Posts: 589

Kudos [?]: 68 [0], given: 0

### Show Tags

24 Oct 2005, 11:45
For me C is the correct answer. The argument is that the studies must be faulty because the vaccine is useless. This is an anormal way of thinking. The normal way would be to reach a conclusion about the utility of the vaccine from studies. The author is actually reversing cause for effect. The same is happening in C.

Kudos [?]: 68 [0], given: 0

SVP
Joined: 28 May 2005
Posts: 1699

Kudos [?]: 492 [0], given: 0

Location: Dhaka

### Show Tags

24 Oct 2005, 12:14
I got C because it uses unclear reasoning like the question.

A. is a causal argument
B. is a personal attack
D. is analogy by argument
E. is analogy by example
_________________

hey ya......

Kudos [?]: 492 [0], given: 0

SVP
Joined: 03 Jan 2005
Posts: 2227

Kudos [?]: 391 [0], given: 0

### Show Tags

24 Oct 2005, 16:04
It's a clear case of circlular reasoning: It is useless. The study says it's good must be wrong because it is useless.

(A) Three of my patients have been harmed by that vaccine during the past three weeks, so the vaccine is unsafe.
Faulty reasoning, basing conclusion on insufficient samples. But not circular reasoning.

(B) Jerrold Jersey recommends this milk, and I donâ€™t trust Jerrold Jersey, so I wonâ€™t buy this milk.
Faulty reasoning. Gratuitous criticism. Doesn't base the conclusion on facts, but base it on credit or discredit of the recommender. Not circular reasoning.

(C) Wingzz tennis balls perform best because they are far more effective than any other tennis balls.
"They are the best among everybody because they are better than everybody else." Circular reasoning.

(D) Iâ€™m buying Vim Vitamins. Doctors recommend them more often than they recommend any other vitamins, so Vim Vitamins must be good.
Again gratuitous assumption.

(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.
Ecological fallacy. Conclusions obtained from a community or group cannot be directly applied to individuals.

It will be very useful to master these different types of reasoning errors, for both CR questions and your AWA test.
_________________

Keep on asking, and it will be given you;
keep on seeking, and you will find;
keep on knocking, and it will be opened to you.

Kudos [?]: 391 [0], given: 0

Re: CR Influenza   [#permalink] 24 Oct 2005, 16:04
Display posts from previous: Sort by

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

Moderators: GMATNinjaTwo, GMATNinja

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.