Considering the way some people refer to the research of the last hundred years and moan about alleged attempts to overturn it, those same people appear to have an astonishing lack of awareness or understanding of what was said in that research. No names, no pack drill.

"As it is, unless songs were learned orally a singer took a tune that fitted - fact"

I repeat: anybody who has spent an afternoon looking at the history of printed songs will be able to spot the flaw in this so-called assertion of fact. To be clear, it isn't a 'fact', it's nonsense.