Accurate census data is essential for a variety of government planning functions and plays an important methodological role in social science. This article responds to issues raised by Alice Sullivan concerning how the UK 2021 census will ask about sex and gender. The two-centuries-old question about male/female sex is not ideal, even with the new guidance proposed; however, I will argue that the proposed changes are unlikely to cause harm. The new open-ended census question on gender identity is welcome and will yield important data. I also respond to Sullivan's worries that "queer postmodernists" are "coming for" questionnaires and threaten the sanctity of scientific fact. Sullivan misrepresents trans-inclusive gender theories and how scientific research explaining sex/gender differences is carried out. Finally, I discuss how questioning the ontological reality of trans gender identities leads to transphobic harassment and worse. [For the article by Alice Sullivan, "Sex and the Census: Why Surveys Should Not Conflate Sex and Gender Identity," see EJ1259536.]