The Backside of the Lie. All people lie, claim the people. But even those who sing the praises of lying do not want to be caught in a lie, and even less do they want to be deceived. Even if one wants to see life itself or at least a necessary cultural technique in lying – we simply do not get used to it. When people cannot get used to something they occasionally do themselves, it is called a moral problem. Those who talk about morality like to mean others. That is why it is no coincidence that we have been fascinated by the liar from the very beginning. Swindlers, con artists, and populists seem to manipulate us like magicians and deliberately lead us astray. The lie is just one of their tools. As if it were only a weapon when it falls into the wrong hands. But is that really all? And can we truly limit the philosophical question of the lie to morality and politics? Philosopher Bettina Stangneth, who has already invited her readers on surprising paths to great philosophical questions with her book "Evil Thinking," poses further, very simple questions in her new essay: What can we learn about our thinking from a lie? Is there knowledge in untruth? And how can we access this knowledge?.