Comment by heresie-dabord

Sure, it certainly could be difficult. But this is often because of information assymetry — the purveyors are making big claims about the dragon in their garage. [1]

If your intuition told you that there ought to be some evidence for grand claims, you would be right to be suspicious of the continuing absence of suitable evidence.

[1] _ http://people.whitman.edu/~herbrawt/classes/110/Sagan.pdf