> It's hard to believe a person of high IQ is not going to be well-read and/or well educated.
What of high IQ individuals who are born into low- or middle-class families, who didn't have their parents read them 19th century British novels, and therefore don't know what a dowager is?
What of high IQ individuals who are born into low- or middle-class families, who didn't have their parents read them 19th century British novels, and therefore don't know what a dowager is?