I certainly wouldn't take Ian Anderson's definition of folk as anything but totally arbitrary. Interesting interview in this month's Acoustic magazine with Reg Meuross who had a very public battle with Anderson on this very issue after he refused to review 'Dragonfly' because it was 'not of a tradition'. Reg says, "This infuriated me as it was someone else carelessly deciding who I was...". The debate got very heated at the time with some rather unneccessary personal remarks from Mr Anderson about those who publicly disagreed with him (myself included).