During this election season, we have seen the power and danger of social media.

We have also seen that social media gives voice to the powerless who can’t afford to flood the airwaves with propaganda. Parents in Massachusetts, for example, deftly used social media to build a statewide organization to counter the multi-million dollar blitz by out-of-state billionaires who were pushing charter schools.

The flip side is the way that social media has been used to spread falsehoods. We have seen the rumor mill at work on Twitter and other sites.

The fact that this coincides with the decline in print media, where there are (sometimes) fact checkers, is cause for concern.

Are we in the post-truth era? How will we sort fact from fiction?