It takes a certain kind of stubbornness to lie about things that are easy to verify.
Donald Trump does it all the time.
During the first presidential debate, he interrupted Hillary Clinton to deny that he had once called climate change a hoax perpetrated by the Chinese. During the second presidential debate, he interrupted her to deny telling America to “check out (the) sex tape” of former Miss Universe Alicia Machado. During the third, the interruption was to deny he’d mocked a reporter with a disability.
He had. The first two were on Twitter; the third had been circulated widely as a video clip. It was stupidly easy to track down the proof.
But instead of letting Clinton make the claim, he felt the need to butt in and deny something that everyone with a computer and 15 seconds could find out was true.
This is the point. Donald Trump lies. All the time.
He doesn’t just stretch the truth in the way most politicians do: selectively citing facts that make them look good, deliberately omitting ones that make them look bad, overstating or understating the probable impact of the campaign promises they make.
No, he just says things that aren’t true. And he knows it. Sometimes it’s something big — routinely, on the campaign trail, he tells voters that he’s going to lower everyone’s taxes while Hillary Clinton will raise them. Sometimes, it’s something so minor — like repeatedly saying he was endorsed “last week” by the union representing immigration enforcement agents, even a month after the endorsement actually happened — that his insistence on lying is all the more infuriating.