Excellent point! I've seen that photo several times and it never occurred to me! (dang, first sign of aging, critical thinking skills waning).
But I also think it's an element of what the educational istitution attempts to eliminate from the minds of children
I read somewhere, a long time ago, that bank tellers were not trained to identify counterfeit bills, rather, intense training goes into knowing the real ones ... so that when a counterfeit comes into their hands, they immediately know something is wrong
They don't need to identify what is wrong ... just that something's wrong
Prettty much describes a lot of what happens to me ...
Except with that semi-satire news crap Freepers occasionally post ... most of those GET me almost always .... and I hate those posters FOR it
/8^)