“Data-Driven Thinking” is written by members of the media community and contains fresh ideas on the digital revolution in media. Today’s column is written by Gareth Davies, co-founder at Truth{set}.

Can the truth set you free? That’s a complicated question in a “post-truth” era, where people will cling to beliefs that support their worldview, even in the face of hard evidence to the contrary. But ...

You’ve seen it quoted from Sunday’s pulpits, loudly proclaimed on the walls of Ivy League universities and public libraries. You’ve listened to it being piously rehearsed by so-called public servants, ...