The issue is likely speed; it takes much longer to debunk a fake or incorrect story than to publish the story to begin with. And in a world where social media i

The issue is likely speed; it takes much longer to debunk a fake or incorrect story than to publish the story to begin with. And in a world where social media is seen as a primary news source (unfortunately), a story is basically seen as 'settled' approximately X hours after being published, if that. You would need an absolute ton of resources, and even that probably wouldn't be enough to fact check the entire online media in anything close to real time.