The other night my daughter asked if I could teach her to play guitar. I said that we should sign her up for lessons. My wife asked why I wouldn't teach her to play guitar, since I play myself.
I replied that I wasn't sure that I would be able to teach her. I am entirely self-taught and while that would seem to be an advantage, it seemed like just the opposite to me. I'm not sure that I could teach another person the way I learned.
Imagine trying to teach English to someone who doesn't speak English at all today. Where would you begin? What are the building blocks that lead to the core principles? I have no idea for English. Nobody really taught me to speak English, I picked it up along the way from my parents and friends, not because they were teaching it, just by listening to it. Then teachers taught various rules and books I read developed additional vocabulary. That's how I learned to play guitar, except without the teachers and books.
Ironically, I think I would be more comfortable teaching beginning Spanish than I would English, because I learned it as a beginner myself and still remember those early lessons.
So here is my question. Can you teach something that you haven't yourself been taught?