None of this is rocket science...the language is constantly evolving...what used to be classified as 'folk' had more defined boundaries. However the term has evolved to cover a much wider field with much more overlap into other genres. We can't bury our heads in the sand over this. When discussing folk with different audiences I would temper my usage of the term to accord with these. Not a problem. When I'm discussing with TSF members we would use something like the IFMC 54 descriptors, but when using the word with my fellow performers we would be discussing something much wider, more a style of music, with very flexible boundaries.