It could be both at the same time. One can be a master in certain art, yet can't explain what's going on. Think cooking: Many chef "searing steaks" to "keep

It could be both at the same time. One can be a master in certain art, yet can't explain what's going on. Think cooking: Many chef "searing steaks" to "keep juice in". It don't keep juice in, but it taste good. Think language: Most native speaker can form grammatically correct sentence, but they can't really explain how. Yet many linguists, knowing how some languages work, keep bullshitting about another language.