Alright, I've got a response from Mokou regarding what points Saikou has been arguing against. As usual, I'm just passing along the message. Here ya go:
"The Dream World having physical presence is universally agreed upon. I don't know why you're even bringing that up.
Since you seem fixated on the interpretation that the Dream World "transcends" the real world, let's drop all mentions of "transcendence" entirely. The verse would still be H1-C, for reasons I'll explain.
All this nonsense about whether or not string + brane theory is valid for 10-D or higher is moot; Ultima agrees that branes are good for higher dimensions, our tiering system FAQ also mentions this, and we've discussed this topic within the thread multiple times, with near universal agreement that the cosmology is at least H1-C. With that out of the way, we can in fact say that reality in Touhou is 10-D. The Dream World, then, is 10-D by extension; it's been shown to recreate reality (the outside world, the Netherworld, Hell, Gensokyo, I could go on), and is very explicitly stated to be the opposite side of the coin that is the real world. All of this points towards the Dream World acting as a sort of 'mirror' to the real world; whatever exists within reality, exists to the same extent in the Dream World, including the 10-dimensional structure of reality.
This also scales to ordinary dreams, as we have
numerous statements of them being equivalent to reality. Dreams = Reality = 10-D, this isn't that hard to follow. And of course, Doremy scales by virtue of it being her ******* job to create and destroy dreams. There's no reason to put dreams any lower than whatever tier we accept the cosmology as; if they were superior or inferior to reality in any way, shape, or form, there wouldn't be so many statements saying that dreams and reality are the same.
I'm also not sold on this being an outlier; Doremy's dream creation and destruction is a core component of her character, we can't just ignore it. Yukari also has a
dream creation feat, and since this attack and Doremy's dream-based attacks are considered "safe" enough for spell card duels, there is no reason they wouldn't scale. And of course, the primordial god stuff, which Yukari and Reimu scale to with hax.
Overall that's 3 feats, one of which is extremely casual and very commonly performed by a single character that other high tiers upscale from. Now, that doesn't necessarily make it more consistent than H3-A/L2-C, but it is consistent enough to not be considered an outlier.
Even ignoring all mentions of dimensional superiority, H1-C is both consistent and explicit.
Onto the stuff from your latest post:
As stated before, Yukari is not the only one with a tier 1 feat. And even then, why would Yukari being the only one with a tier 1 feat change anything? Most high tiers have no notable feats of their own, they just scale to the handful of universal feats out there, and we can do the same with tier 1. Lunarians upscale from Yukari, the other sages scale to her, and Mokou’s durability downscales from her. This entire argument is reliant on ignoring the existence of powerscaling.
Rinnosuke not knowing the full extent of reality is completely irrelevant; he knows that the gods created reality, and then we have a separate source saying that reality is 10-D. Nothing is contradicted here; it's just two separate sources painting a broader picture of what the gods are fully capable of.
I don’t think anybody was arguing for Hell being higher dimensional. It isn’t (at least I’m pretty sure it’s not), and not particularly relevant to the feats and scaling on the table IMO, so let’s just drop it.
First off, please don’t insult Onsokuno, I disagree with them on shit too but I don’t claim I know more than them. Also, if you admit you don’t know more about string theory/higher dimensional BS than an average person, maybe wait for more knowledgeable staff to come along (and two of them have already agreed to the thread, mind you).
Hell containing more Otherworlds is also irrelevant. Let’s try to keep things focused on the Dream World, primordial gods, and waiting for input from Ultima/Elizhaa/Yuri"