"Why? Simply because it's so evident a forgery by someone who out to have known better."
Where does fake or genuine come into someone having written a song?
Your deninitition makes every song performed in a folk club a folk song - Blackleg Miner is performed in hundreds of folk folk clubs therefore, by your own definition - it is a folk song - stop blustering and take your foot out of your mouth.
The rest is reguritated, obscurantist bullshit waffle.
Jim Carroll