Do we judge an "expert" on their ranking or on their knowledge and ability? If 50,000 people excelled to the level of the current #250, would only that best player be an expert, or could all 50,000 be considered to have excellent domain knowledge and ability? I'd call all of them experts.
Expert and "highly ranked" or "best" don't necessarily need to be the same thing.
Many of us get termed software experts or design experts or IT experts without any ranking systems.
Do we judge an "expert" on their ranking or on their knowledge and ability? If 50,000 people excelled to the level of the current #250, would only that best player be an expert, or could all 50,000 be considered to have excellent domain knowledge and ability? I'd call all of them experts.
Expert and "highly ranked" or "best" don't necessarily need to be the same thing.
Many of us get termed software experts or design experts or IT experts without any ranking systems.