Charlatanism and Logical Fallacies.

The Exo-fantasists, self-proclaimed ufologists and conspiracy theorists make use systematically  the most well known and not so well known logical fallacies.
This is so, because these show-men, some of them professional mythologists, have no evidences of what
they give us as true.
Knowing this, it's easy to debunk hoaxes, factoids, and imaginary conspiracies.  Follow the link below for an excellent compendium of logical fallacies.
http://www.logicallyfallacious.com/