[quote=Mammalia]
A. We use the proven theories we have to figure it out. It's most likely that way in each scenario, although we don't know everything about the resources we have so we can never be exact.B. Time is generally accepted as that fourth dimension.C. None of the things I said were declarations of truth. They were possible answers in the case of different factors.D. It doesn't look scientific since I don't have the full explanation. On a related note, I found out that I'm terrible at searching the right terms when having to do with science. "Light circumnavigates the universe" in Google doesn't turn up anything useful.
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A) Proven theories have no place here, since they're not used in every aspect. Scientists fill in the holes.
B) Time is in no way a spacial dimension. If you accepted that it was, you, in a way, accept that we have no free will and our destinies are predetermined. 
C) You said the universe was four dimensional. That's a declaration of truth.
D) It's not scientific since it's not observable, testable, and repeatable.
E) Nope.