So we might imagine that liars have evasive eyes or the opposite, they simply stare at you, or perhaps it is more generally nervous behavior we associate with lies.
Understanding when someone is lying was considered important way back in Ancient China, and one of the first established methods was to look for signs of stress because when a person lies, they become stressed.
When we enter this world where anything can be fake, any image, any audio, any video, any piece of text, nothing has to be real, we have what's called a liars' dividend, which is that anybody can deny reality.
The office of the US Special Counsel Robert Mueller has disputed the accuracy of a news report that President Trump ordered his former lawyer Michael Cohen to lie to Congress.