" Interestingly, a 2000 study by the psychologist Leaf Van Boven found pluralistic ignorance at work when “students overestimated the proportion of their peers who supported affirmative action by 13% and underestimated the proportion of their peers who opposed affirmative action by 9%.” He attributes the effect to political correctness, which drives some of us to lead dual lives, professing beliefs we think others hold while privately holding beliefs that may vary from this presumptive norm. "

― Michael Shermer , The Moral Arc: How Science and Reason Lead Humanity toward Truth, Justice, and Freedom