it's obvious that it's implied from the 3 examples that circle-core means albums with covers where the circle predominates in the design, meaning that it has to be in the center of the cover and stand out from the other elements of the composition to the point of consider the album as "the album with a circle (or something with the shape of a circle/sphere) in the middle". Have you ever heard or read anyone saying something like "oh yeah that Spiritualized album with the circle?", of course not you buffoon,you filthy and banal imbecile, nobody mentions the circles at first when refering to Ladies & Gentlemen because they don't predominate. Same thing with YOTS. God fucking damn it.