"Humans are either male or female" is not "basic biology", it's kindergarten biology. It's strictly false, even if we ignore transgender or transsexual topics c

"Humans are either male or female" is not "basic biology", it's kindergarten biology. It's strictly false, even if we ignore transgender or transsexual topics completely. It is sometimes an abstraction that is good enough. It's a bit like Newtonian physics in that way.