revert In music two octaves plus a semitone equals   Dear Dicklyon  I agree with you that without a RS we should not include a lot of text on this However even if I cannot find a RS right now the fact cannot be in dispute since it is as valid as  for which I would not know how to find a RS Could we not agree on including this one sentence in the disputed sightings section hoping that someone will find this knowledge useful andor will find a source for it We could attach the fact tag if you like