I perform The Trick That (Allegedly) Fooled Einstein.
When I first learned about this trick I was skeptical that it would be capable of deceiving anyone. Once you know the secret you think “Come on, this is so obvious. They’ll know how it’s done.” But I did some more research into the history around it, found a few alternative presentations, and found a way to pull it off that I think better masked the method to deliver a greater impact. No one at the show figured it out, so I guess it is deceptive enough if you present it the right way.
Usually I cite the originator of all the routines I do, but this one, fittingly for its apocryphal status, has been attributed to so many magicians and mentalists over the decades that it’s hard to find any definitive proof of who the originator is.