We who live on Fantasy Island can define away as much as we like but the real 'folk' are much more democratic and will use the word 'folk' in its widest sense. To them just about everything that goes on in folk clubs and festivals is 'folk'. You can scream as much as you like, Knut, but the tide will still come in.

You need new terminology if you want to define things down to the last demi-semiquaver. Oh and you'll have to keep it very quiet otherwise the real folk will come along and nick it.