WELL, THERE’S THE PROBLEM WITH THEIR RESEARCH:

“We don’t believe that little girls naturally play a certain way or speak a certain way,” says Fought, a professor of linguistics at Pitzer College. “They’re not born liking a pink dress. At some point we teach them. So a big question is where girls get their ideas about being girls.”

Having two X chromosomes plays a major role. I’m guessing that Carmen Fought and Karen Eisenhauer don’t have kids.