If someone tunes an instrument 15 or 20 cents low or hi, and it makes no difference but for the moment it's hi, and plays a B is it a C or a B# or could it be a Cb??? It is still a B or a C depending on where you play the note, C key or B key on a piano.... Is it really a B or a C. If in a guitar you stretch a string when playing is it a B or a C or something else. It's not really about theory or sheet music but about frequency and how one perceives the sound produced. All arguments aside, You cannot teach a horse to talk and the same is true with a jackass... You might, however, be able to teach a horse or even a jackass to play a tune but he can't explain how he did it.