Mr. Beaver's advice

"But in general, take my advice, when you meet anything that's going to be human and isn't yet, or used to be human once and isn't now, or ought to be human and isn't, you keep your eyes on it and feel for your hatchet."

The passage is from Chapter 8 in C. S. Lewis' The Lion, The Witch, and the Wardrobe.  It has been cited frequently in recent years in relation to the development of artificial intelligence.  I wondered about the original intent in 1950 in a book written for children, and I found this commentary in a literary stackexchange in 2017:

But what does makes sense is that Lewis is foreshadowing the central role that humans play in the history and salvation of Narnia. Remember that there is a prophecy that Jadis' power will be broken when two sons of Adam and two daughters of Eve sit on the thrones of Cair Paravel. Only a human being can validly rule Narnia. By stressing that the witch has no human in her, Mr. Beaver is pointing out that she is not the true ruler of Narnia. That which looks human and is not is a pretender to the throne. Only a true human can occupy it.

That idea of the imposter, the thing that looks human and isn't runs through much of Lewis's work. It is there in Men Without Chests (part of The Abolition of Man) and it is there in Out of the Silent Planet where Ransom tries to explain to the Malacandrans what is wrong with Weston. It is there in The Last Battle, where Shift dresses as human and gets Puzzle to dress as Aslan.

From a theological point of view, Satan is the great imposter. Christ is the new man: that which it truly and fully human.

So no, this is not about the uncanny valley, it is about imposters, those things that set themselves up as good and true, as rightful rulers, but are not.

That was then, this is now.  I'm going to apply the rule to AI.