Things I learned today, Nirvana ripped off the song "Come As You Are" from the 1984 Killing Joke song "Eighties" who IN TURN ripped off THAT song from the 1982 The Damned song "Life Goes On"... but Killing Joke claim they'd never heard The Damned song and in fact ripped it off of a 1968 song by The Equals called "Baby Come Back".
All linked below in comments:
a19180