Some Mad American Scientists have developed algorithms that allow a robot to decide whether it should tell someone the truth or not. They plan to use these in military operations, ie "Robot leaves a false trail and hides itself" and so on. The US military's technology has had huge impacts on the world. They did invent the internet, after all. So, it's just a matter of time before these robotic liars become commonplace, scurrying around, lying to people.