Twilight Zone Between True and False

Recently we read a lot about fake news, alternate facts and journalism lies. Companies like Facebook develop data science algorithms to detect these postings, based among other things on crowd sourcing (collective intelligence.) But can the data scientist, with her inquisitive mind and strong sense of numbers and probabilities, use her brain to assess how true a piece of information is? I am talking here about fuzzy logic, and human rather than artificial intelligence to determine the probabilities. Here is a recent, popular example: the Firefall in the Yosemite National Park (California), pictured below.