Wow, I wasn't trying to imply that the
FR setting is "real" (whatever that means), just that you could use physics as a base for dealing with the different settings in the game. For example,
FR on one plane, Ravenloft another, etc.
And you're perfectly correct, relativity does not allow one to "know" which plane they happen to be in (no physical test can tell the difference between one and another). Although if the party mage DOES suddenly end up with a wand of nuclear missiles, it's a fair bet you're not in
FR anymore

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Lovecrafts creatures weren't supernatural ya know ... they came from other worlds, or other galaxies, or whatever (he seemed to imply Yog Sothoth had come from a completely different multiverse). The problem being that his creations diddn't use magic in the same way it's understood in
AD&D (their use did not depend on "the weave", for instance, and would not be limited by it).
My point is that creatures with high enough INT may well be able to integrate with physical forces 25 and lower INT simply cannot imagine (much less hope to control). Actually, I rather think that was Lovecraft's entire point... to show us as being completely helpless in the face of such alien monstrosities.
As far as the gods trying to sweep knowledge of Ao under the rug, there are several references to him throughout game dialog. There are also several references to "dead" gods as well (maybe even the whole "Kozah" thing?), so that appears to be fairly common knowledge as well (at least as far as
BG is concerned).
My curiosity was about how Ao related to demihuman (or non-human in general) gods and pantheons. I wasn't aware he was supposed to be the only power at that level in "realmspace" (the
FR plane?), but many of my old books have been lost over the years. You never hear references to him outside of human gods in the game, so I was thinking their might well be a whole slew of creatures at his level, each overseeing the pantheons of a particular race. Such was the original question anyways

.
Thanks for the input tho, it's given me a lot to think about!