Math Proof that PROVES that Barney is the AntiChrist. Given: Barney is a Cute Purple Dinosaur Prove: Barney is the Anti-Christ 1: Romans did not have a letter 'U'. Instead they had the letter 'V' CVTE PVRPLE DINOSAVR 2: Subtract all non-roman letters. CV V L DI V 3: Change to numerical values 105 5 50 501 5 4: Add them up '666' 5: Barney = A cute purple Dinosaur = Satan.