Nobody said Appalachian music didn't have UK roots. Jean Ritchie, among others, have proven that even if any reasonable person had ever doubted it. It was only pointed out that Appalachian music is not the sole root of bluegrass and that bluegrass owes very nearly as much to blues as it does to anything else. There are also some significant differences, though, between bluegrass and older forms of Appalachian music.