It is what I said, if something is beyond your ability to judge on its merits, you have to use trust.
It does not have to be disparaging, I had to focus on personal trustworthiness of my dentist and car mechanic, since I am not able to form judgment in their areas of expertise. It was a painful trial and error process before I found the good ones.
But this is political forum where we are supposed to be able to debate on our own. Otherwise we might lose chance to remain quiet :)
However, I have experience with this person as an untrustworthy source; therefore, I would prefer to see any information, if true, from some other quarter.
Just exactly like your dentist!
We inherited our car mechanic - we know he's trustworthy because he's working on his third generation in my family (my 18 year old daughter just bought her first car from him.)