[@Bishop]

If my opinion counts as anything, I agree with you. But I also think that overall, the fact Sprigg's character knows she's in a church doesn't really matter. While it's certainly an unusual conclusion given the evidence, more so since she happens to be right, it ultimately doesn't really improve the situation just because she happens to know. It's a very minor that thing, assuming we all don't get killed here and now, we're all bound to figure out on our own once we're out of the basement and have some concept of what a church is.