Dear Eckard thank you so much for your feedback.I will answer in two parts because of the length.
My highlighted basic false assumptions make it clear that I consider externally existing foundational space-time to be wrong.
Here they are listed again as in the essay....
1. Space time exists externally テ--
2. Space-time is foundational テ--
3. Time is a dimension of external reality テ--
4. Gravity is caused by curvature of space-time テ--
5. The visible Image universe (as seen) has material existence テ--
6. Space and time began at the Big Bang テ--
7. The universe is the space-time continuum past, present, and future fully formed by inflation from a singularity テ--
Then I have another list of what must be correct assumptions:The first few here:
From what is known and what is required for a fully functional explanatory framework, without contradictions or paradoxes, these postulates can be given-
1. Space-time is an output from processing data that has undergone transmission delay of varying amounts.
2. Space-time is emergent.
3. Time is not a dimension of independently existing Object reality but is a dimension of observer fabricated Image reality.
It is clear from those lists that space-time is not supported as the foundational reality in which physics is occurring. Having said that Einstein's relativity and Minkowski space-time works to predict what will be observed and so are still useful. Though I understand that Hamilton's quaternion arrangement is more useful for example for navigation by jet pilots. I think both kinds of mathematics are dealing with potential sensory data transmission and how that data will be intercepted, rather than the arrangement of foundational sources of data that are existing in uni-temporal-Now.