What happens when your friend’s smartphone can tell that you’re lying

What happens when your friend’s smartphone can tell that you’re lying - The Washington Post: "In just a few weeks, the next installment of “The Hunger Games” will arrive in movie theaters. The latest in a long line of films to depict a future all-knowing or controlling government — think “1984” or “Minority Report” — the dystopian tale will likely be a runaway hit. But the power to seem all-knowing – or at least know more than do now – may soon lie in technology that’s already in the palm of your hand."