Lemon Juice, Invisibility and Cognitive Distortion

Does rubbing your face with lemon juice make you invisible to video cameras?  It’s the Anosognosic Dilemma. How can we ever know something is wrong if we don’t know what that something is? If I don’t know. And I know that I don’t know it. That’s fine. Because I do know about it. But what about the unknown unknowns? Just…