The difference between an expert and an authority
Launch library · evergreen read

An expert has developed genuine, demonstrated skill or knowledge in a specific area through study or direct experience over time. An authority holds a position of influence or public trust, which does not automatically mean their views on a given technical question are especially well informed or reliable.
The two often overlap, but not always, and confusing them can lead an audience to accept a claim simply because of who said it rather than because of the underlying evidence behind it being presented. A prominent voice is not automatically a reliable one on every topic they choose to address.
Checking whether someone's expertise actually matches the specific claim being made, rather than their general reputation across other unrelated areas, is a useful habit. A respected figure speaking outside their area of demonstrated knowledge deserves the same scrutiny as anyone else making that same claim, regardless of how well known or well regarded they otherwise are.