//In Period 3 Pre-Calc C, Rose has just written the impossible expression "4/0" [4 divided by 0] on the board. Rose: This is garbage. Just because I wrote it on the board doesn't make it real. //He proceeds to prove his point by drawing other mathematically-impossible expressions on the board. Rose: In fact, it doesn't even have to be on the board. It could be something I say. Like . . . Wheelbarrows forever! Sunrise into the art.