Like all parents, I like to believe I know my daughter better than anyone on earth. But, at least according to this study, that doesn’t mean I know her well enough to tell when she’s lying. Here, researchers filmed groups of children lying or telling the truth, and had various groups of adults judge whether they were fibbing. It turns out that no group of adults, even the children’s parents, were able to do better than they would by random guessing. Kids poker tournament, anyone?