Arguments against 4D AD:
1:
It's already 4D in the sense that it's a small multiverse.
This is a terrible attempt at a dismissal. The fact that he even had to specify the technicality under which AD is a 4D structure means he knows that it's currently not accepted as being 4D in the way the way the upgrade is suggesting. AD has universes contained in a space which is obviously on a higher level than 3D. That's what the point is.
2:
The statements don't explicitly refer to AD's size.
This doesn't align with what has been commonly asserted to be our standards in the Tiering System. Not to mention common sense would dictate that when you're already
superior to space-time, there isn't much else that superiority can refer to other than scope. We already know that AD's extradimensional space is larger than the dimensions that are in it, and that it extends throughout thier time, so that this superiority would refer to size is already the most logical conclusion. Even without that fact, what else would it be in relation to? It's not "beyond" in the sense that it resides outside of space and time. Otherwise they would've used the other variation of koeru. It's simply legitimately superior. (Something that can never be said about stuff like the Quantum Realm from the MCU, which has been used as a counter-example.) We've been over this so many times.
Arguments for 4D AD:
1:
It's SUPERIOR to space and time. As per the FAQ (If a structure qualitatively superior to a 4D is 5D, then it would naturally follow that a structure with "regular" superiority to 4D is also 4D, not 3D or less). Since that statement is already all it needs to be 4D (without contradictory evidence or recontextualization) all it would need to be 5D is evidence that its superiority is of a qualitative nature, which we'll tackle later.
2:
We know for a fact that it's larger than the space it has inside of it. So the statement about it being superior to space in scope is uncontroversial since it's basic common sense given what we know.
Why can't the same be applied to it's superiority to time? Especially when it already has to extend throughout all its universes' time in order to allow such free travel through it?
Arguments against 5D AD:
1: [[Same as the 4D ones]]
2:
Disagreeing with the translations provided by TheNinthHour. We all made our call here. The evidence is laid out before you clear as day. Every expert in Japanese to speak on this topic has agreed with the translation. This is out of my hands now.
Arguments for 5D AD:
1: [[Same as the 4D ones]]
2:
It's specified that its superiority to space-time is qualitative when the Twitter statement says it is superior to the mathematical dimensions of the verse.
3:
The way the universes in it are portrayed imply a qualitative superiority over them. Seeing as the images in the "Another Dimension" level of RTDL are meant to be representative of the areas Kirby visited through the inter-dimensional rifts, and that we already know for an absolute fact that each of those areas are different universes. Not to mention the space Kirby and co are travelling in during the level is the space that connects those universes to each other. It's so easy to put 2 and 2 together that it's already implied in the cosmology blog that those images are in fact separate universes. You can say that's not Effi meant, but are you really gonna tell me that the place which,
even in his own words, explicitly contains universes isn't actually portraying those universes when the main cast travels in a level which is literally the space between them?
That's what the level is, and that's the whole idea of Another Dimension. In the story, Kirby and co. are in the space between dimensions moving from Halcandra (in one universe) to Pop Star (in a completely different universe). You're really gonna try to tell me that they're not flying past other separate universes in the process? Even when, again, we know that the images they're flying by represent locations that are accepted to be representations of areas that are exactly that?
Did I get all the arguments? If I missed any, I'll edit them in and post again if needed. The 4D upgrade should be very uncontroversial. It's mind-blowing how it's still met that much resistance when it's such a low ball for what I genuinely believe to be the truth. Effi is right in a way. AD IS already 4D in the sense that it's small multiverse, so the 4D end of the upgrade is a small deal relative to what we already have.