Le Guin writes, in the essay that we pulled a quote from to begin our preprint: "Wanting to be human too, I sought for evidence that I was; but if that's what it took, to make a weapon and kill with it, then evidently I was either extremely defective as a human being, or not human at all."
Chills every time I read this.
I will tell you what. This is how we should read the "evidence" about human ability -- it has been applied *backward*, to justify exclusion, not to learn.