THE TRUE INFINITY
The justification for the Root being High 1-A goes as follows, starting with this
scan which I will elaborate on from there. The root is directly implied to be unreachable through the recursive measures of stacking infinities. I know people have a problem interpreting stuff properly, so I'll explain better how this is implied.
This explains how conventional infinity has limits.
Actual infinity is completed as a collection; the idea is further extrapolated by using the analogy of a non-Euclidean space which is still an infinite space but with limits because for any dimension X, it would be infinite, but the limit comes from the next dimension, which is a directly higher infinity.
So for 2 dimensions, it would be infinity^infinity in hyperbolic Geometry/non-Euclidean geometry and the idea is carried on to any dimension up to 1-A+ the arithmetic and principle stays the same all the way up to 1-A+, the limit of the infinity relative to the first dimension would be infinity|^infinity, it can't reach the second dimension which is a higher infinity
As you know, power setting one infinity to reach another is an arithmetic operation that carries on all the way up to 1-A+ as well, and power setting a set of natural numbers is 2^n or infinity^infinity, which is still similar arithmetic to the hyperbolic Geometry stacking of any dimension X takes 2 dimensions for now being infinity^infinity
Getting into the root in comparison, it is said that;
Essentially, this means that the Root is distinct from such infinities, and the arithmetic operations used in those infinities cannot be used on the Root. This is why infinities that use arithmetic operations of infinity^infinity can be cut by Shiki Ryougi, who can perceive the end of such infinities due to her eyes being connected to the Root, which is an infinity of a fundamentally greater scale to such infinities and why for her such infinities are only small rooms as said;
This makes it clear cut that the Root would be ontologically equivalent to the inaccessible cardinal in magnitude and should be High 1-A
Furthermore, the origin is accepted to exist within the Root and should be 1-A; as such, we've already had people like Roa, who is accepted as having a 1-A soul that exists within the Root from which he can reincarnate from.
The ontological nature of the Root would exist inaccessibly greater than such baseline 1-A things and should be more supporting evidence for it being High 1-A