Boston vs Nirvana

I read an article in the Globe about how certain songs sound the same and how the song writers "borrow" from other songs.

Here's an example of how Kurt Cobain used the guitar riff (he has acknowledged it) from Boston's "More Than a Feeling," to write "Smells Like Teen Spirit."

http://www.deadparrots.net/audio/Boston_vs_Nirvana.mp3