What exactly does this sentence mean? At first, it seems to imply that 40%
of the adults in this country are illiterate or almost illiterate due to
some reading disability. But actually it states only that 40% have some
reading disability (does this include far-sightedness?), and that some of
these are consequently illiterate. The relevant question is, what percentage
of adults is unable to read a meal order from a large illuminated display?
Any guesses, or better yet, actual facts?