Fascinating. When I was a kid and was having difficulty with some task, my grandfather would say, "You didn't hold your mouth right." Many years later, I realiz

Fascinating. When I was a kid and was having difficulty with some task, my grandfather would say, "You didn't hold your mouth right." Many years later, I realized that he was talking about tacit knowledge (and probably most specifically about one's embouchure when playing a wind instrument). There are vital aspects to most skills that are simply not evident to the casual observer. I had not heard the phrase "tacit knowledge" until today; I'm glad to have a word for it.