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

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SVP
Joined: 16 Jul 2009
Posts: 1512
Schools: CBS
WE 1: 4 years (Consulting)
Dr. A: The new influenza vaccine is useless at best and [#permalink]

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19 Aug 2009, 14:03
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14. 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.
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Senior Manager
Joined: 26 Jul 2009
Posts: 347
Re: A and B [#permalink]

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20 Aug 2009, 01:54
Perhaps you can post the OA?

Previous discussion is still open:
the-new-influenza-vaccine-82620.html
Senior Manager
Joined: 29 Jul 2009
Posts: 315
Re: A and B [#permalink]

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20 Aug 2009, 02:21
I think the answer to this question should be C.

Dr. A uses circular reasoning because he assumes what he tries to establish. He tries to demonstrate that the vaccine is useless at best and possibly dangerous. What evidence does he offer to support this? that the vaccine is worthless.

Because the argument is flawed any answer choice that contains valid reasoning can be ruled out.

A) Three of my patients have been harmed by that vaccine during the past three weeks, so the vaccine is unsafe.
This is seems to be correct reasoning.

(B) Jerrold Jersey recommends this milk, and I don’t trust Jerrold Jersey, so I won’t buy this milk.
This is a flawed reasoning, I think called ad hominem. The speaker here critics the person rather than the argument.

(C) Wingzz tennis balls perform best because they are far more effective than any other tennis balls.
This is an example of circular reasoning. Why do Wingzz tennis balls perform best? because they are better. This should be the correct answer

(D) I’m buying Vim Vitamins. Doctors recommend them more often than they recommend any other vitamins, so Vim Vitamins must be good
This seems to be correct reasoning

(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.
This seems to be correct reasoning
Senior Manager
Joined: 27 May 2009
Posts: 268
Re: A and B [#permalink]

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20 Aug 2009, 02:39
Really Tough ....IMO C: Pls post OA and OE
Manager
Joined: 21 Jul 2009
Posts: 249
Location: New York, NY
Re: A and B [#permalink]

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16 Sep 2009, 04:32
C

Explanation after yoir OA...

Posted from my mobile device
Re: A and B   [#permalink] 16 Sep 2009, 04:32
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# Dr. A: The new influenza vaccine is useless at best and

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