It's not science denial. Biology has all sorts of instances of more than two sexes. Humans have at least a dozen different genetic configurations that affect th

It's not science denial. Biology has all sorts of instances of more than two sexes. Humans have at least a dozen different genetic configurations that affect their sex organs and hormonal development in a visible way. Here's a diagram of a few: https://i.redd.it/s44am9nqwes11.png https://i.redd.it/s44am9nqwes11.png And that's just a narrow view of sexes through the lens of biology. Social science, anthropology, neurology, medicine, psychology, endocrinology and basically every other science that interfaces with human bodies generally agrees that sex is not binary in humans. Once you've updated your understanding of what the science says on sex, come back and we can talk about gender, and how science agrees that gender is not only not a binary concept, it's purely a social concept.