Where on earth did I say anything like this:
'It is knowable that the universe is natural and real'.
It is certainly knowable, by me, that my day to day experiences are consistent with a belief that the universe is natural and real. Maybe it isn’t? If it isn’t, that hasn’t had any influence on my experience of it. Whatever determines those experience, if it’s a crafty demon or some kind of simulation has no relevance to anything I said.
My point, as I’ve said several times, is that regardless of what is meant by real, characters in a work of fiction and something like a cup or a plate, or your next door neighbour, are different categories of thing. They are experienced differently. A character in a book is something I can imagine and think about, but I can’t hold it in my hand like a plate, or talk to it like I can talk to my neighbour (or not yet, anyway). Characters in books suddenly becoming people I can talk to, touch, interact with, who are like everyone else, who eat food, ****, get drunk, get old, die etc. is not something that is consistent with my experience of the world, or with the experience of anyone I know or have heard or read about. Same goes for gods, their existence is limited to people’s imaginations. That’s the point you responded to, whether you understood it or not. If you want to start some other conversation, tell me what it is you want to talk about rather than just ploughing ahead with your assumptions.