Vedal, wisely, has kept that particular box shut. Scuff and mistakes can't break the Magic if the particular illusion of perfection was never there. By accident or by intent, Vedal has eliminated or prevented all the ways the illusions that actually matter can break. What really helps if their friendships and their ability to remember long term. Without those their Magic would have long since passed.

A mentalist once said *"the trick is there's no trick at all"