On the identity of authors as a proxy for accuracy, the Edwards story did not get much early traction because of the source. The National Enquirer does not have the highest standing in the public mind for credibility. In the end, in this case, the National Enquirer was right about the paternity issue and John Edwards did acknowledge paternity of the child with Rielle Hunter.
Going back a decade, one recalls how George Stephanopoulos, on the "This Week" show, denied the accuracy of the story of Monica Lewinsky's blue dress because it was reported by the Drudgereport. Much later, the story proved to be true.
The flip side is also true. Just because someone is a professor from a university does not mean that their testimony is accurate. An MIT professor testified against Edison's light bulb patent. Furthermore, professors can omit facts. [See
What the expert doesn't include in the expert report can be important ]
Cross-reference as to the Edwards story: DAVID PEREL