Coldplay openly admits ripping off Kate Bush:
I think that is admissible evidence in this new lawsuit by Joe Satriani, who says Coldplay ripped off his song. Here's a good (and blessedly short) video comparison of the 2 songs:
I can't cite cases, but there's got to be a rule that melodies that generic can be copied with impunity. Isn't it about what you'd sing off the top of your head if you whimsically decided -- instead of speaking -- to sing the next few things you had to say.
Satriani's song is insipidly titled "If I Could Fly," which sounds like the title of every horrible "American Idol" finale song. There are about 10 reasons why I hope he loses this lawsuit, and not one of them has to do with Coldplay being any good.