Something like host over half of all Americans cannot read above a 5th grade level. Almost a third are functionally illiterate.
It’s not that they don’t have critical thinking skills. It’s that the entire lower-90% have been so badly nerfed that it is increasingly difficult for anyone in that cohort to get to a point where they can educate themselves without copious assistance.
And that’s exactly how Republicans prefer the population - uneducated, illiterate, ignorant and gullible. The better with which to scam them for their votes.
Oh, thank god, that snake-oil salesman is finally gone.