PS's comments are totally appropriate in light of what others have posted in this thread.
Tostadosunidos, if music is organized patterns of rhythm, harmony and melody (well a minimum of two out of three), is it at least a possibility that you simply might not have the knowledge to understand how the musicians are using these elements? With all due respect, while you are engaging in a discourse you seem to have closed your mind on the subject.
Still interested in how you define rock and roll.
BTW, didn't western civilization start to decline during the heavy metal years?