In this essay I focus on some of the psychological aspects of how communication technology affects the way that people deceive and trust one another. The deep concerns we’ve been facing lately about a “post-truth society” are really a reflection of how we can trust one another in a world dominated by social media, a place in which people we may or may not know can communicate with us at any time and from anywhere. How can we tell if someone is lying to us in their tweet, their Facebook post, the news that they shared via a text or an online video? Worse yet, some of those people might not even be people, but bots coordinating to promote some propaganda or commercial interest.
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