"Sorry, I know now," the third Nao waved at the tester. "I was able to prove that I was not given a dumbing pill." After all, it could speak! That means the machine was able to recognize and differentiate itself from the other two -- it was self-aware at that particular point in time. That test is a simpler version of a puzzle called The King's Wise Men , wherein the "wise men" have to guess what the color of their hat is (between two colors) if they can only see the other people's hats. You can watch the experiment go down below. But if you're in Japan, you can also see Bringsjord present his study on artificial intelligence in person at the IEEE Ro-MAN2015 convention from August 31st to September 4th.