We can't see inside other people - or can we? In everyday life, we constantly try to take a look behind the facades. We talk to a person about the weather and ask ourselves: Are they serious about what they are saying? What does she think about me? And while we're doing that, our brain is running at full speed, gathering countless pieces of information. But should we really rely on it? Can we crack another person's thoughts like a code? What strategies do we use to do this? And what are the consequences if we get it wrong?