Bill Nye decided that his show "Bill Nye Saves the World" would debut with a big long tribute to gender fluidity and the ideology that although it is psychological, gender is as subjective as sex, which means we technically have a huge spectrum of sexes. Not just the two identifiable by science.
In his second installment, he tried editing a scene from his 90's show to crop out the segment on x and y chromosomes. It kept saying that there are two sexes.
One must admit: he was wrong then or he is wrong now. Either way, his new paycheck is not saving anyone but him. it is, however, bolstering the idiotic SJW masses.