a medley or not a medley

Hi, Katy... Since the first time I read the name "I believe/All I need to know (medley)" and after hearing it loads of times, I've been wondering why it says "medley"... why? medley of what??? I hope it isn't a dumb question, but it's something that sometimes keeps me thinking for longs minutes trying to figure out... Love ya all, Ces..

THE BAND SAYS THEY GUESS THAT AT ONE TIME THEY THOUGHT OF THE SONG AS TWO SEPARATE PIECES THAT JUST HAPPENED TO BE CREATED OVER THE SAME BACKING TRACK. THE FIRST BEING "I BELIEVE," THE SECOND BEING "ALL I NEED TO KNOW." ALL A BIT SILL REALLY BECAUSE ACTUALLY, IT DOESN'T SOUND LIKE A MEDLEY TO THEM EITHER - JUST ALONG THE OUTRO