Automated systems fight ISIS propaganda, but at what cost?

The spread of ISIS propaganda online has put social media companies in a tough position. Governments are urging Facebook, Twitter, and Google to more aggressively remove extremist content, in the hopes of reducing the terrorist group’s influence. But the companies’ self-moderation systems have struggled to keep pace, and terrorist material continues to spread online.
Now, a nonprofit organization has developed an algorithm that it says can automate the removal of terrorist-related co