Not much. I'm no expert on experts. Maybe an expert on experts will come along and share his/her expertise on experts.
what can you say about experts?
They are experts. So, they say.
Depends on whom labels them as such?
Do they label themselves? Are they labeled by the overwhelming body of peers within their field of study?
Do they submit findings that have maintained their integrity through multitudes of peer review?
Your Question lacks context . . . needs more data to answer.
We exist; but the word is a comparitive judgment only.
I was always told that an expert is someone from out of towen who owns a briefcase.
The person who thinks they know
it all is a fool.