[mylife]

I do not think 75% of the populous would understand what Jefferson wrote.

[Graewoulf]

Leonardo de Vinci put it this way:
“There are three classes of people:
* those who see,
* those who see when shown,
* and those who do not see. “

(Note: * added of clarity.)

BTW, current Opinion Polls on Obama tend to support de Vinci’s observation, IMHO.