But I think you can't. It seems to me, instead, one is better at googling/prompting the better they are in a particular domain, but it only applies in that domain. Like knowing a jargon is not a skill, knowing the domain is.
There are certainly local “finding information online” experts in many families and social groups.
> and how do we know they are an expert
They are the ones who get mentioned a lot in conversations in the manner “I'll have to ask [name]” with the implication that [name] will look up the information or know it from previous occasions people (possibly this specific person and [name] is getting sick of them asking and not remembering simple answers!) have asked.
https://www.youtube.com/watch?v=fo1BR9itwOY
https://blackhat.com/presentations/bh-usa-05/bh-us-05-long.p...
If you can always say “just use it right” every time a critique comes up, then we aren’t having an honest conversation about the limitations of these tools.