Space-time theory and string theory are not randomy generated. One was asserted by Einstein and the other by the forefront of theoretical physacists. What happens is that people take real factual data and create a model (theory) out of it. Sometimes people use multiple theories to create other theories and so on. Obviously the higher you go the risk of not achieving truth increases. Don't let the complications hold you back. No matter how complex something is, it can be described in simpler terms that are easier to manage. I will of course agree with you with regards to things like 'Astral Projection' and the like. That's just fantasy.
I would have to assert that each dimension has an answer to this both seperately and combined. The answers may be consist of both the finite and the inifinite. The difference is in what's influencing what. I don't think its semantics in this case. A dimension controlling it's content is far different than the content controlling itself. I would assert that x, y, z, and t could all exist without one another and exist in any combination. While I have zero evidence to support or refulte that sentient life could exist in such universes, they do mathematically exist just fine. Take x alone for example. x would be the sum of everything at once in the same dimension. Similarly the same is true for t (even if the sum is an infinity). If t and x are combined then their sums can be spread across each other and form individual states in an array comprised of the two dimensions.
Good God, man, of course I know that. I think we are in agreement. I didn't want to be specific as not to target any one individual.
Say it with me 'Astral Projection', 'Etherial Travel', 'Psionic Teleportation'. These phrases don't reference individuals. They only references concepts created by the imagination.