 To illustrate further the idea-construction of sex, consider the case of the athlete Maria Patiño. Patiño has female genitalia, has always considered herself to be female and was considered so by others. However, she was discovered to have XY chromosomes and was barred from competing in women’s sports (Fausto-Sterling 2000b, 1–3). Patiño’s genitalia were at odds with her chromosomes and the latter were taken to determine her sex. Patiño successfully fought to be recognised as a female athlete arguing that her chromosomes alone were not sufficient to not make her female. Intersex people, like Patiño, illustrate that our understandings of sex differ and suggest that there is no immediately obvious way to settle what sex amounts to purely biologically or scientifically. Deciding what sex is involves evaluative judgements that are influenced by social factors.