Absolutely valid point, but I think that from a Christian POV, the question comes down to an entity having a soul, or you know, the something that makes humans somehow distinct to animals. This, let's call it a soul, is I think needed so that God has something to grip in order to deliver the divine inspiration. Following up, the LLM then needs to have this "soul", so that it can be inspired, so that it can deliver proper divine revelations. The question really is, where does this soul begin, and end, and what does it need to form an attachment to something. Can a human be born without one, can something, that is not a human, have one at any point? And again, as you say, how to test for this? It would really be a shame to be fooled by an entity, saying that it delivers holy texts, just to find out later that it was the Antichrist or something, and just a test of faith.