premise: "All We Ever Knew" is a song written and recorded by American folk band The Head and the Heart, released as the lead single for their third studio album "Signs of Light" by Warner Bros. Records. The song was written by the band and produced by Jay Joyce.
hypothesis: The Head and the Heart is an American folk band who wrote and recorded the song "All We Ever Knew" for their second album "Signs of Light"
reason: Signs of Light is their third album, not their second.