The claim of blindness, on the other hand, can be tested. People follow the image of their own eyes in a mirror. Not only that, even if they don’t flinch when I bring my hand toward their face quickly, most will involuntarily glance at a $100 bill that I wave in front of them. An old-school neurologist tested this effect. What denomination will get a blind hysteric to follow the bill? A $1 bill doesn’t work; a $100 bill works almost all of the time. So he always carried a C-note in his wallet just for that purpose.
Study - Relation between GDP and amount of local currency that makes testing blind people reliable.
