I'm not so sure about that. Compare with literacy. Not only is there a largish part of the population that hasn't enough reading proficiency'to be called litera

I'm not so sure about that. Compare with literacy. Not only is there a largish part of the population that hasn't enough reading proficiency'to be called literate, but even a large part of the literate do have trouble reading and comprehending texts, forms, and what not that are written by higher educated people. This is a big problem with governmental forms and the like. For the people for which these forms are often the most important have the most trouble reading and comprehending these forms.