User blog comment:Eightynine!/baby 5,probably the next strawhat/@comment-759660-20121214033509/@comment-1595565-20121217034158

In that case we go to a failsafe known as dramatic irony, which is when the reader or audience knows something that the character doesn't, creating mild humor through contrast. Brook saying Laboon was dead is such an example of dramatic irony in One Piece. Therefore, we would know to disregard that information as fact.