Good rule of thumb in general.
One technique Ive found of understanding if someone is genuinely knowledgeable or faking it is to read their books or listen to long form podcasts (not just interviews). More data points create a more complete picture.
Re:A chat with Ray Dalio
by chiefalchemist on Sunday June 12, 2022 @06:30PM
(#31718889)
Also probably more complete in the sense an interview is likely to be edited (to establish or reflect a particular narrative). Along the same lives the interviewer and questions are often set up in advance to accomplish the same.
It’s also why I’m suspect of everyone famous. It’s just such a warped personality that seeks and maintains a public persona. Not saying that they are evil or bad people - just that their motivations are very suspicious and you should be extremely critical of what a public person says. The vast majority of successful and wealthy people are not public figures and don’t try and parlay their opinions into personal fame.