- The Limit of the Soul isn't because people have some undetectable, immune-to-everything soul; no such thing exists. The closest thing to a soul is the Magic spirit, which is either destroyed or, more optimistically, sent elsewhere when a Divine funeral rite is performed. People with True Faith transform their Magic spirit into one with Divine Might instead, and people sufficiently aligned with the Infernal change theirs to be Infernal.
Evidence: Might-bearing beings exist in both the Divine and Infernal Realms that claim to be the souls of former humans (saints and damned souls), and both can be freely interacted with via Hermetic Magic. Either these beings truly were once humans, in which case the Limit of the Soul is not real and the Magic spirit/ghost is all you've got, or all three of those things are merely simulacra of the once-living person, in which case we are left without evidence of a deeper soul beyond the Magic spirit.
- There is no God, or at least not a pre-eminent and all-powerful one.
Evidence: What counts as sin on a metaphysical level varies based on individual religious and local cultural beliefs. Angels and demons both vary their presentations and even names to suit such differences. Additionally, miracles can be compelled by sufficiently pious characters with a skill check. There are sufficiently expansive conceptual beings within the Magic Realm (in the Might 75-100+ range) that the existence of the world and humans does not actually require a central divinity willing it into existence. The Astra Planeta are even noted as broaching the boundary between Magic and Divine and potentially accessing Divine effects. These things either suggest or at least allow for the possibility that God is not the all-powerful creator of the world, but merely an extreme case of the same belief-powering-reality phenomenon that Faeries feed on. Perhaps it is simply that so many people worship the Abrahamic God, and that between them they have such vastly different concepts of what is allegedly the same Divine, that it prevents a single Faerie from playing the role, and instead it is simply a reality-bending mass of pure vitality that can be invoked to repel the other supernatural Realms and create miracles, or else it was a Faerie who got so much worship it transcended its Realm.
Counter-Evidence: Several places from early Biblical stories canonically exist in Ars. It's not like there's no other way to explain why humans and snakes are barred from the otherwise-accessible and very existing Garden of Eden, but it sure does suggest a God being around before there were a lot of people to worship said God. (Although, counter-counter, it's really weird if capital-G God's absolute on-high invocation of banishment for the original sin of man- and snakekind can be bypassed by shape-shifters. Almost feels more like an autonomous defense system designed to purge any beings that consume the fruit, rather than an all-knowing and all-powerful being delivering a holy punishment for partaking in the Garden's bounty.)
Alternatively...
- There is no Divine Realm at all. It's all an Infernal scam.
Evidence: Infernal power can feed any information it wants to other Realms' information-gathering magic. This places immediate doubt on the veracity of the one Realm claiming to be an exception to that rule, and on the reliability of any rules we think we know about the made-of-deception Realm. Aside from just conspiratorial factors making it possible, the main actual evidence is behavioral overlap. The moldability of the Divine and Infernal across religions and cultures necessarily renders them hypocritical, punishing people in one place for actions they are rewarded for in another. The religious institutions representing the Divine and the royalty who have its favor are the purveyors of much of the largest-scale sin in the land, yet continue to receive supernatural blessing in spite of that. This may also explain the rampant sinful personality traits among statted angels.
Counter-evidence: seems like "angels" and demons would use tricks from each other's books more often if they could, like demons refusing summons or angels perfectly hiding information. Also requires disregarding the entirety of RoP:I's breakdown on demon methodology, independence, and psychological weaknesses, given the immense scope of cooperation maintaining this charade would require, even with a relative inability to examine them on anything but their terms.
Idk why I decided to do this, just seemed like fun I suppose. Pick these apart or propose your own at your leisure.