大全－c－14，请大家帮忙讲解一下

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.（C）

Dr.A的推理: 流行感冒疫苗是无用的－>该疫苗有用的论文是错误的因为该疫苗无用。

C：W网球好是因为W网球远比其它网球好。

逻辑错误其实就是circular reasoning. 原因就是结果。

狂感谢

终于懂了,谢谢,谢谢

有点感觉了 有其他的circular reasoning的例子么 好像大全test A-15题就是个circular reasoning的example...

15.   Alba: I don’t intend to vote for Senator Frank in the next election. She is not a strong supporter of the war against crime.

Tam: But Senator Frank sponsored the latest anticrime law passed by the Senate.

Alba: If Senator Frank sponsored it, it can’t be a very strong anticrime law.

Which of the following identifies the most serious logical flaw in Alba’s reasoning?

(A) The facts she presents do not support her conclusion that Senator Frank is soft on crime.

(B) She assumes without proof that crime is the most important issue in the upcoming election.

(C) She argues in a circle, using an unsupported assertion to dismiss conflicting evidence.

(D) She attacks Senator Frank on personal grounds rather than on he merit as a political leader.（C）

(E) In deciding not to vote for Senator Frank, she fails to consider issues other than crime.

上面的题目答案为C