I claim in this chapter that everyone lies, even if just a little bit. Do you agree? Have you ever lied or deceived someone in order to influence him to do something or believe something? Were you ever caught in the lie? If so, what was the consequence? Assuming that there is a scale of deceptive practices from least to most harmful, which do you consider least harmful? In your view, are these practices unethical? Which ones are most harmful?