All that stuff about heavy metal and hard rock I don't subscribe to any of that. It's all just music. I mean the heavy metal from the Seventies sounds nothing like the stuff from the Eighties and that sounds nothing like the stuff from the Nineties. Who's to say what is and isn't a certain type of music?
A fact is a simple statement that everyone believes. It is innocent unless found guilty. A hypothesis is a novel suggestion that no one wants to believe. It is guilty until found effective.