Expertise vs Opinion
Expertise vs Opinion.
Professor Tom Nichols
Possibly the best and most articulate synopsis on the topic . Written in 2014 but rings particularly true in 2017. This piece is essentially a cultural and political commentary but it applies to just about everything, including dentistry.
I am (or at least think I am) an expert. Not on everything, but in a particular area of human knowledge, specifically social science and public policy. When I say something on those subjects, I expect that my opinion holds more weight than that of most other people.