Actually Jim, folk music doesn't necessarily have to be composed by 'anon.' and note that the 1954 definition doesn't mention anonymity of composition at all. Cecil Sharp believed that the author of a folk song had to be anonymous, but since his time this view has been modified.

The classic example of a traditional song with a known author is 'The Famous Flower of Serving Men' which was published in July 1656 by Laurence Price (see 'A Book of British Ballads' by Roy Palmer, Llanerch Facsimile Reprint, 1998).

It is of course the PROCESS that the song has been through - not the question of whether it has a known author or not. And the IMPORTANT thing about C# is that he was a pioneer of this evolutionary view of folk song and not that he may have got some of the details wrong. People who assert that such and such a song (usually a favourite of theirs) will be "a folk song of tomorrow" might (just possibly, IF the 'folk process' is still operating) be right, but only time will tell!