Originally Posted by Blank.

Yeah, he doesn't know punk like us. Check out this punk band, I think you're gonna like it:

Originally Posted by The Sane Psycho

Please enlighten me, oh pretentious one. I need your annoying punker than thou attitude to guide me out of my foolishness.

Originally Posted by elphenor

they usually just get called Rock, christ

until you had prog and punk, and finally fully electronic pop, pop and rock were just interchangeable

but if we take "pop" to mean popular again, you have the fact that Ramones were about as popular as the other (American) first wave punk bands, that is, not at all

Originally Posted by MicShazam

Genre terms aren't perfect. They're just supposed to help with categorization.

Most music stores I've been to that had genre sorting put Lady Gaga, Led Zeppelin, Abba and punk in the same larger category of pop/rock, then usually separate sections for blues, classical, jazz and metal. One big record store chain that doesn't exist anymore also had an indie category.

In academic terms, both Cannibal Corpse and Britney Spears are simply "popular music", with differentiation only applied between blues, jazz, classical and various kinds of traditional and avant garde music (I think they might also consider electronic music and country separate categories).
This makes sense from a certain perspective, since the only differences between death metal and dance pop, for example, are stylistic. There's a reason why it's so easy to convert a pop song into a metal song, a rock song into disco, etc.

Originally Posted by The Sane Psycho

1. The Fastbacks are pretty lofi, but they're undeniably pop punk. Same with Green Day before Dookie. Same with Four Minute Mile era Get Up Kids.

2. To answer your question, I don't think there is a such thing as just "pure" punk.