Achilles Bogart’s cite that the universe may be a giant hologram falls into what agnostic tendencies I may have. It is on the point that if there is a god, or merely something godlike, that science and mathematics should be able demonstrate it. There may even be currently unknown, unthinking phenomenon that occasionally effect coincidence, or lend credence to cultural folk tales which might have been a partial source of religiosity. But if so, at this time we currently cannot see any such thing either because we cannot yet define that thing to look for or we do not yet have the tools to make subtle enough measurements.
Why should such considerations be made? The universe as a hologram simply implies that we may neeed to re-examine what we know about the universe, perhaps within the context of a multiverse, or the possibility that our univese in influenced by something non-relatavistic. It may or may not have to do with gods. With current developments in string theory developed from quantum physics there is some possibilities that other universes may exist. Because gravity is such a weak force in a way that is not understood there is a line of research being pursued that assumes it may be a shared resource within a multiverse. Thus, to talk about influences outside our universe is actually a line of reasoning being taken today in a quest for a unified theory. If gravity does have an effect, could there be other things that do as well? Perhaps not a god, but something that could have led many to think there was one?
Or since early days of quantum physics, the possibility of alternate timelines where all probabilities that don’t happen in our universe may (must?) be played out elsewhere. My understanding of the many worlds theory (correct me if I’m wrong) is that quantum physics seems to demand that all probabilities must occur and that there should be accounting of, for example, all coins tossed that don’t come up heads in our universe. While the possibility of other timelines having an effect on ours is likely nothing more than science-fictional story telling, it can’t be 100% ruled out at this time, if ever.
It’s also not beyond the realm of the possible that something finite, in our universe, behaving according to the laws of physics such as an alien civilization which is thousands or millions of years more technologically advanced, could have at some time or even now stealthily interacted with us in ways that could be god-like. I’m not a proponent of in the last example in the least. Nevertheless if it were so, the question remains, how would we know? The Flying Spaghetti Monster is reputed to alter all of our scientific data so that we do not see its noodley appendage. How would we detect a significantly advanced cloak of invisibility as it were? It might only be found if we look for it. Likewise, while Intelligent Design has no scientific footing whatsoever, I welcome the idea simply to see if someone can come up with a rational definition for a creator solid enough to test for it. I expect there will be no such definition found, but again, sometimes until one tries, one never knows. Until then the null hypothesis rules - without any evidence it doesn’t exist.
So, if I have any agnosticism at all, it is that something god-ish should be detectable by scientific means, and has not. It must at least have an effect on the laws of physics to interact with us and our universe in some fashion. But the question I ask is, are we simply not advanced enough to look for it yet either because we can’t define it, or we haven’t stumbled across its footprint elsewhere in math or science, or we don’t have the technological means that would let us make such an inquiry?