Exactly, Les - he made that point. So the "real" truth is open to debate. I merely quoted that website partly to demonstrate the fuzziness around the subject. And I did say "almost"... :-)

I'm aware that this is a folk forum (among other things), but to say that folk music played little part in Goodall's story is - well - tough. We have to work with what we know. He did make the point that Luther (for example) took folk tunes as the basis for some of his hymn tunes.