Iain, you are still confusing songs from the oral tradition with what is happening on the folk scene today and since 1950. One forms part of the other. By all means have a go at defining the wider meaning of folk, but I'll guarantee we'd all come up with something different. I'm quite happy with a broad sweep of, 'if it sounds like folk it is folk'. As others keep saying other genres don't need hard boundary definitions and they get along fine. Why should we be different? Don't pander to the trolls.