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.