It is not at all easy to say what an expert
is. This is actually studied in EpistemOlogy
under the general heading ExpertKnowledge?
. On one account, put very roughly, an expert is a person who is (or, perhaps, is widely recognized to be) a reliable (see ReliabilIsm?
) source of KnowledgeByTestimony?
for other people.
Can be contrasted with CrankS, who think they know what they are talking about, but don't. And with AcademicElitism, a syndrome of those who think that ONLY they know what they are talking about, and no one else does.