Melody trumps lyric..has to be true, when you look at how Bowie and various others used to/still cut and paste (literally) put rhyming couplets together with Sellotape on a sheet of A4 etc. Plus, I remember hearing Neil Peart saying the music was always far more important than the words. Meaningless words abound and Michael Stipe famously wouldn't publish lyrics on early R.E.M records simply because he wasn't singing real words half the time and they were reverse engineered after the fact. Indeed, lots of us writing songs do ad lib nonsensical stuff over our music just to get a melody down and then edit in real words and meaning after...stream of consciousness and all that. Of course, Sting is well known as keeping notes of stuff he thinks of (as does Peart) and borrowing allusions from literature, philosophy, science, psychology, art etc. E.g De doo, doo, doo, de, daa, daa, daa (I think that was in the pilot for The Teletubbies or was it the Flowerpot Men?)