Well, maybel. But it could be that he has no qualifications either. If he hasn't proven his knowledge in some venue, how can he claim to be an expert?
I remember what my Platoon Sergeant in Basic said: "Just kause you got some fancy Kolleege Degree sure don't mean you got any schmartz!"
"If he hasn't proven his knowledge in some venue, how can he claim to be an expert?"
Good question - why don't You ask the five judges who accepted him as an expert witness?
Please forgive my not volunteering to ask for you.
Anybody can be an expert. Just have to say it loud enough.
Of course the real proof is in the pudding. Is his information confirmed by other sources? Do any predictions he might make prove correct? Stuff like that.