 The only difference was that one had been colored red with a flavorless dye.For six years, Texas A&M University invited people to taste wines labeled "France", "California", "Texas", and while nearly all ranked the French as best, in fact, all three were the same Texan wine.The contest is built on the simple theory that if people do not know what they are drinking, they award points differently than if they do know what they are drinking.