you have no idea what you're talking about unlike the silly kids who come to this site and put this false information everywhere i actually know as a fact that deep purple black sabbath and led zeppelin are hard rock and not by any means at all heavy metal sabbath and deep purple themselves have stated clearly many times that they are not heavy metal you are putting false information on this site which is why this place is so unreliable i am cleaning it up and making it more accurate i would guess you are clearly much younger than me i was brought up with these bands and i know better the same with the stupid idea that heavy metal started in the late 's it did not it started in the mid 's i know because i saw it form being the forefather of heavy metal does not make you heavy metal yourself it is you who is vandalising this website by putting false information on these bands pages after they have made clear several million times that they are not what everyone keeps saying they are it is also easy to hear the difference if i had the power it would be people like you who would be blocked because you are making this site an unreliable source of information if you think you're right ask the bands themselves then maybe you will change how you think but i doubt it take care