Trump’s Presidential win left half the world aghast, and the other half saying ‘I told you so’, raising all kinds of questions about the flow of information online. And it's led to a call for social platforms and media outlets to take some responsibility. But is it too little, too late?

“People have asked about the dislike button for many years,” announced Mark Zuckerberg at an informal Facebook Q&A in September 2015. “Today is a special day, because I can say we’re working on it and shipping it.” Of course, the internet has had something to say about it.

The American election brought the issue of fake news into such sharp focus that Facebook boss Mark Zuckerberg pledged to take steps to address it. Those steps are now coming to fruition in the form of flags that let readers and third-party fact checkers mark stories as ‘disputed’.

If Faisal Islam, Ralph Keyes and theNew York Timesare to be believed, the Trump candidacy and the vote for Brexit show we've entered a post-truth era – a world where emotion and populism win out over facts and experts. But is it true? And do emotional appeals really trump facts and figures?