This is the way I determine who is Pro or "Pro"

Whoever gives you answer by his/her understanding is Pro, becasue his is telling you his/her true knowledge.  I always appreciate/respect the people who gives own opinion no mater it's right or wrong.

Whoever gives you answer by "googled link" is a "Pro", becasue he/she is affaid giving a wrong answer.  In case its wrong, he/she can say "oh, google is wrong".  I never credit this "Pro", because he/she knows nothing about the answer.  Google does.