Hi
very interesting all that.
The reality is in strictly in 3D a,d time is strictly also irreversible.
The time is not a dimension but a constant of duration for an evolutive dynamic.
It's totally different.
All these extrapolations,strings, Mtheory, Ex,extradimensions, reversibilities of time,Multiverses and MWI,even the Hawking radiations, all that is purelly hypothetical.
These extrapolations insert maths without any respect of our ultim referential.
The symmetries are bad extrapolated.The time is bad understood.The external cause of mass is not possible.
read the post of Eckard about the causality please Dr Cosmic Ray.We see any cause of these theories and thus any effect.
The dimensions aren't a pueril play of decoherences of our foundamentals.If it exists a 3D of our reality , it exists a cause of these laws.
And all laws are in a dance of harmonization of our constants.
All our experiments,datas, technologies respect this referential in 3D.If the duration of time is a constant,there is a reason !
Ray you know the best way to use maths is when they describe the reality around you ! If you insert the 0 the - and the infinity for your perception , never you shall understand the uniqueness and its pure number.
Regards
Steve