President Trump's America is making a thing out of lecturing its allies about the importance of free speech. And yet while doing this, they spread toxic disinformation over and over again, and you quickly realise that America believes - uniquely of any country currently in the world - that 'free speech' means the 'right to lie'. But this definition is a relatively recent one. So let's discuss how it changed, and why this perversion of one of the most important democratic principles should be resisted.