"I thought we'd agreed that 'f**k' isn't definable?"

No, if you'd read any of the interminable threads that have gone before there are (at least) two irreconcilable schools of thought:

(i) Those people who know that 'Folk' was defined perfectly adequately back in 1954.

(ii) Those who, for some unaccountable reason, are desperate to have their favourite types of music defined as 'Folk'.

Now, before you come back at me, and bore the pants off everyone else, please go back and read all of those interminable threads - and when you've done that - GO AWAY!!