I agree background information is interesting.
Neither do I agree with interrupting people [unless they make a racist comment], however I have been interuppted once by Fred Jordan and once by a folk club organiser, I continued unabashed and was not intimidated by anyone.If any one tries to interrupt me I am ready for them.
I do not need any definition to decide which song I am going to sing, I have no desire to sing pop songs, if i did I would have become a pop singer and made a lot more money, I believe I AM EMPLOYED IN FOLK CLUBS TO SING TRAD SONGS,WHICH I CAN RECOGNISE WITHOUT A DEFINITION.