Vic Smith wrote:

"Breakfast time in the Smith house, some time in the early 1970s. Sitting at the table are Vic and Bert Lloyd - he has sung at our folk club the evening before. Vic had been outlining his confusion about what exactly constitituted a folk song and what didn't. His points closely resembled what he has just quoted from Dave. Bert's reply was an analogy that Vic remembers clearly more than 45 years later.

"Look out of your window. I think that we can agree that it is daytime. If we were still sitting here at 10 o'clock tonight, we would look out of the window and agree that it was nighttime. However if you were to ask a hundred people to nominate the exact moment when day became night, you would get a hundred different answers. It is the same with the 'What is folk song?' question."

He said much the same in the documentary

A portrait of folk singer A.L. Lloyd by Barry Gavin at 48:20