"How come Tom Robbins comments are correct but Dr. Benett's aren't? Looks like the writer is letting bias show. Nah, that can't be right."
Isn't it possible that a person can look at two statements from two different people, judge one statement as correct, and one as incorrect, without their being evidence of bias? If you criticized Louis Farakkhan would I have to think that you were biased against him or simply expressing an intelligent opinion?
Put perfume on a pig and it still stinks.
The author clearly shows her bias. Just because you think it sounds fine to you doesn't change that fact.