From KurzweilAI:
The app arranges a deck of playing cards in such a way that a specific card picked by an audience member can be identified (and dramatically displayed on the phone) with the least amount of information from the audience possible. To create the app, they “taught” AI software how a mind-reading card trick works and how humans understand magic tricks. The software then created completely new variants on those tricks that could be delivered by a magician. The research also suggests questions about how superintelligent AI systems might be programmed to manipulate people and how such algorithms might even be developed accidentally. For example, an AI might gain power by making people believe it was supernatural.
More here.