I bet if they let it run its course and get spread on facebook and other social media, it will go from belief to 'common knowledge'.
In Chapman University's latest Survey on American Fears, pollsters asked about 10 alleged cover-ups. In the most striking result, 25 percent of the respondents agreed—and another 7.5 percent strongly agreed—that the "government is concealing what they [sic] know about the North Dakota Crash."
What's striking about that? Just that the pollsters had never actually heard any conspiracy theories about a "North Dakota Crash"; they threw that in to see how people would respond to a vaguely ominous-sounding episode that they invented......
http://reason.com/blog/2016/10/25/pollsters-made-up-a-conspiracy-theory-an