The author of course is correct that communicating a model does not necessarily communicate expertise, and that many important elements of expertise are non-com

The author of course is correct that communicating a model does not necessarily communicate expertise, and that many important elements of expertise are non-communicable (at least not easily) tacit knowledge. But what is not addressed is that some mental models very clearly can be usefully shared. There is not a clear and distinct line between a "mental model" and communicating fundamental elements of how something works. For example, my 8 year old was trying to figure out why his walkie-talkies kept making howling, screeching sounds. I explained the concept of feedback to him and he was immediately able to put that knowledge into practice (keep them further apart, or don't have both microphones on at the same time). I would argue that for tech and business work, communicable models/techniques vastly outnumber noncommunicable models/techniques.