I would argue that the 1964 Beatles were Rock'n'Roll, and that Rock first appeared with Dylan (and the Dylan-inspired Folk Rockers such as the Byrds and what Tom Wilson brilliantly did to S&G's "Sounds of Silence") in 1965. And that much of the difference was lyrical as opposed to musical. And 'Help' was a transitional album for the Beatles, and 'Rubber Soul' was a Rock album. I do realize that I am by necessity over-generalizing, that reality is often resistant to labels. I also believe that Rock is functionally dead as a mainstream music, and has been for almost 30 years. It is now a niche music, much like jazz. I hear "Wooden Ships" and think, yes, that's me. I hear "Papa's Got a Brand New Bag" or "Disco Inferno" and don't at all relate to it as being me, yet I consider all three to be brilliant works of music.