The reason I believed in High 1-A is primarily due to the idea that everything dissolves into the Matrix as a Unity.
Unless there is a reason against it, I would assume this includes everything prior that is listed in the Cosmology blog, including the layers of 1-A.
This would mean the framework that differentiates those layers of 1-A would also dissolve into the Matrix (as it conditions everything and everything dissolves into it). It would thus be superior to the multiplicity generated by the 1-A layers and their genera.
Afterall, the tier 1-A as a whole is a genera consisting of repeated steps of the same time, generally R>F but not necessarily. Each layer of 1-A is just adding an accidental quality of "+1" which determines which level some layer stands at in the framework, while the framework itself as a genera does not change.
And if something dissolves the framework into itself, or dissolves them in a way that the multiple layers of 1-A can no longer be differentiated from each other, that is where High 1-A begins.
From our Omnipotence page:
Other than that, some of what I said is also derived from here (Specifically the Hierarchy section):
I will quote some small parts, but I recommend reading the entire section yourself if you have time:
Whereas, from the scan provided by the OP, it seems that the AllSpark/Matrix is:
- Contains everything that has ever existed.
- The wellspring from which every Essence emerges and returns to.
- In the AllSpark everything is One, and has no individuality.
- Is Infinity, Omnipresent and Omniscient compared to everything else.
I would say that should be enough. High 1-A is simply something that transcends the differentiation between 1-A layers, the same way 1-A transcends dimensional differentiation. The whole "Inaccessibility" itself can be achieved in a multitude of ways (For example, if it is Infinity, it gives that everything (Finiteness) cannot reach it).