The fact that humans can be XO; XXY; be XY but Androgen insensitive, and so present as female; have mosaic X/XY; or be XX/XY chimeras like the twins in this art

The fact that humans can be XO; XXY; be XY but Androgen insensitive, and so present as female; have mosaic X/XY; or be XX/XY chimeras like the twins in this article shows that sexual differentiation can absolutely be diverse.