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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] New post 30 Oct 2007, 11:41
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D
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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
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 [#permalink] New post 30 Oct 2007, 12:14
I like C...

Statement these balls are the best, support, because they are the best.

Dr.A I would never prescribe medicine A, because medicine A is bad.
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 [#permalink] New post 30 Oct 2007, 12:15
B.

Is there an answer E?
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 [#permalink] New post 30 Oct 2007, 12:16
B.

Is there an answer E?
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 [#permalink] New post 30 Oct 2007, 12:17
B.

Is there an answer E?
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 [#permalink] New post 30 Oct 2007, 13:06
defenestrate wrote:
I like C...

Statement these balls are the best, support, because they are the best.

Dr.A I would never prescribe medicine A, because medicine A is bad.


I Agree, cudn't be anything but C!
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Re: Cr - Dr A [#permalink] New post 30 Oct 2007, 14:11
I feel its B.

Because I feel they are worthless I wont buy or use any

Because I dont trust so I wont buy this milk
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 [#permalink] New post 31 Oct 2007, 05:07
Guys, from the main statement: The new influenza vaccine is useless at best and possibly dangerous.

From here how can we deduct C?

I would much rather go with A, but i would probably be wrong. Could somebody please explain it?

Thanks,
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 [#permalink] New post 31 Oct 2007, 06:04
Answer is B
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Re: Cr - Dr A [#permalink] New post 31 Oct 2007, 17:37
abiswas 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


Elaborating why I choose B earlier:

Even though the three studies published in the Journal of Medical Associates have rated that vaccine as unusually effective - Just because I dont trust it - its useless and dangerous.

A - is totally out
C - is comparing X with all other Y's out there
D - is out too.

B - even though Jerrold Jersey recommends this milk - I dont trust him so I wont buy this milk or use it.
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 [#permalink] New post 31 Oct 2007, 22:20
We all know that the answer is 'C'. But can anyone explain the reasoning behind 'C'. Thanks!
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Re: Cr - Dr A [#permalink] New post 01 Nov 2007, 06:16
abiswas 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


B is bad -> If A recommends B then A is bad
now replace Jerrold Jersey with A and milk with B.

My take is B.
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 [#permalink] New post 01 Nov 2007, 10:18
vsaxena wrote:
We all know that the answer is 'C'. But can anyone explain the reasoning behind 'C'. Thanks!


The original passage uses circular reasoning. Dr. A has decided that the vaccine is worthless. When Dr. B presents evidence that the vaccine is actually effective, Dr. A says that the evidence is no good. But Dr. A doesn't have any independent reason for thinking the studies are no good: A just assumes that they are no good because she already thinks the vaccine is worthless. What looks like a further argument ("Those studies must be faulty because the vaccine is worthless") is really just a restatement of the original premise.

C also uses circular reasoning. "Effective" and "performs best" mean the same thing. Saying that the tennis balls perform best doesn't really give a reason that they are effective; it's just a way of repeating the premise that they are effective.

(Notice, by the way, that C, like the original passage, should look like a pretty bad argument.)

A might be accused of being a hasty generalization, but it's not circular.
B is an example of ad hominem reasoning--basing your ideas on your opinion of a person.
D seems like valid reasoning--it's an argument from authority, but in this case, the authorities, doctors, probably know what they're talking about.
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Re: Cr - Dr A [#permalink] New post 01 Nov 2007, 18:34
abiswas 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


Ive seen this b/f somewhere and the OA that I saw was C...
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 [#permalink] New post 01 Nov 2007, 23:11
that's funny. I was just thinking that a couple days ago. Why can't the gmat have only 4 answer choices?
  [#permalink] 01 Nov 2007, 23:11
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