To broaden the discussion about an informed public slightly, it's interesting to consider that the flip side of believing fake news is disbelieving real news. Those two seem like opposites--extreme gullibility on the one hand, and extreme cynicism on the other. But they work together (sometimes within the same person) to make the public uninformed. The problem is that it is very difficult for the layman to know what information is authoritative and what is not. You could take the point of view that we should be skeptical of everything, but I don't see how that is a practical answer. If my doctor tells me that taking a certain drug will save my life, I don't have the training or the time to do my own research and find out if that's really true. I could Google for the drug on the internet, and see if my doctor's opinion seems to be the consensus, but that doesn't really tell me whether it's true, or not, unless I have some confidence in medical consensus. The world is an incredibly complicated place, and we don't personally have the time or ability to understand it without relying on others.