[Frumious Bandersnatch]

hinting that modern humans interbred with other human species

But, but, but I thought that one of the (nearly) sacred definitions of a sexual species was that it could not breed true outside of itself.

[js1138]

But, but, but I thought that one of the (nearly) sacred definitions of a sexual species was that it could not breed true outside of itself.

That would be a creationist definition of species.

In real biology, it's more complicated.