I've come across this before. I call it ineffable knowledge. The expert may know that they know something, yet isn't always able to articulate it. In creative

I've come across this before. I call it ineffable knowledge. The expert may know that they know something, yet isn't always able to articulate it. In creative areas like music, cinema and sound design people are able to make extraordinary connections and skilfully master tools (virtuosity) without necessarily being able to explain. With music the skill resides in motor circuits and the nervous system itself which may not be amenable to introspection except in dreams. [1] I first encountered this via analytical knowledge elicitation for making "blackboard" expert systems - the most "talented" experts (who we were trying to learn from) would always say "let me just show you". That's when I realised that the oft repeated phrase "Those who can do, those who can't teach" is possibly the most ill-informed sentiment ever expressed. To teach one needs to be an expert, know that one is an expert, and communicate the nuances to others. It specifically requires that you understand the ways in which your students are not expert in N different ways, for M individual students. As the author describes, there's a point where vocabulary and 'vista' means you see and think about things in a qualitatively different way. Someone in the top 1000 is playing a different game than someone in the top 10,000. And each of these is unique because expertise individuates past a certain point. In some sense PhD's are all unique experts in a field of one. This is frustrating if encountering people, say in interviews or debates, and you realise that they are not actually able to grasp what it is you know within some "test/frame" they are trying to apply to you. Whose 'fault' is that? Surely ones own. So the next milestone is learning to see that gap and be a good communicator, A take-away I get from the article is that recruiters are poor at their job because they are not expert enough. Cookie-cutter HR is a bane for business. [1] Descartes' Error: Emotion, Reason, and the Human Brain. Damasio