What is Rock

I think the question of what "rock" is, is being extremely over analyzed. Obviously it's a very subjective question, but the subjectivity should be able to be narrowed down more than it currently is. Rock comes with preconceptions (in my experience) of wicked electric guitar solos along with some awesome drums. I think the argument that hip hop is rock is quite silly. Hip-hop/rap is it's own unique genre and has it's own unique sound and rhythm. I'm not a music expert so I might be a little out of my league saying these things but I think in order for something to be classified as "rock" it should have that rock and roll sound that's hard to describe with words. It should sound like Metallica or Van Halen or Led Zeppelin. When I think of rock I think