Early in Monday night’s presidential debate Hillary Clinton mentioned that Donald Trump had said global warming is a hoax perpetrated by the Chinese. Trump interrupted (he does that a lot) to protest that he never said that.
Trump’s problem is that he said it on Twitter — so it’s right there, for everybody to see (and we’ve seen a lot about it, many times). Denying that he said it, was an outright lie. There’s no doubt. Denying it when it’s been seen (and repeated) so often by so many people, is just plain stupid.