In the late 80s early 90s Northside (i think) sang a song and the words went something like.......they know that we know that you know that they know....... or something like that???? can anyone help??? who is it and whats the title???
I could be barking up completely the wrong tree here, but the Super Furry Animals releaseda song called 'Demons' which had a line similar to that. It goes "I know that you know we both know they don't know what's going on." But it's from 1997, so it might not be what you're looking for.