I agree with the author that men are more likely than women to hold forth on things they really don't know anything about, but in my experience, "educated" women are also likely to do this to women, and sometimes men, they perceive as less educated and/or intelligent than themselves. So my theory is that people in general tend to do this to people they perceive as less educated and/or intelligent than themselves and that men generally perceive more people--and especially women--as being such.