hence the plot feature of "infinite worldlines". It covers all errors... like those pesky Olympics that happened in 2006 and 2008!
It would probably be refreshing for a would-be TT who decides to use quantum mechanics and MWI to actually have a clear understanding of the subject. The random appearing outcomes that result in infinite possibilities are based on well prepared idealized systems that are composed of a few simple particles like electrons or photons. But QM clearly states that large systems like Chevy pick-ups, people, 200 kg boxes containing time machines or billiard balls do not react quantum mechanically, as a whole, in the same manner as a few individual atoms or sub-atomic particles - not to mention that the branch universes in MWI are unobservables that, if the TT's are going to use the MWI theory at all, are classified as being totally outside any possible communication between them. QM is a statistical science. The statistics involved in large systems state that the larger the system the better behaved it is insofar as predicting outcomes are concerned. Billiard balls don't suddenly change colors, jump off the table into alternate universes or randomly evolve into a quart of cream cheese. One electron can display such weird behavior. The number of permutations becomes more and more finite as the size becomes larger.
If they're going to use that plot device they need to think it through. An observation event, like attempting to travel to another branch universe simply results in another branching event, another set of infinite universes and the universe that the TT ends up observing is random and not necessarily close to their original universe, whatever "original" really means within this context. If the number is infinite then there is no original universe for the TT anymore than there is an "original" TT. There's an infinite number of copies of the TT each of whom believes him/herself to the be original.
If they are going to use the MWI plot device a bit of an understanding pf the uncertainty principle and chaos theory would also be helpful. If they're going to use QM then they should know that's its a ridiculous assertion to say that two seperate universes that started in the same state would evolve in such a way that they would have a "2% divergence" that means they are very similar other than some football scores are different and some people have green eyes instead of blue. On the very large scale the universes might be similar - stars and galaxies spread out somewhat uniformly thought out the universe. But the details of systems like individual plants, trees, people, cultures, etc. would quickly diverge wildly.
One would certainly recognize the physical laws in that universe because if the laws are even slightly different the person who would otherwise be the observer-TT would not be able to survive in that world of divergent physical laws. Other than that the world would be completely different. Maybe interesting to observe, but the chances of that world's issues being helpful in solving specific problems for specific people, nations, cultures, etc. on the TT's "original" world (see above for doubts about the definition) would be nil.
Tossing out MWI as a dodge to justify the story where it becomes obvious that the writer has no idea about they're writing about is a clear indication of a hoax...especially after it was the would-be TT who cast the MWI stone into the water only to later back away by stating "Well, I'm not a physicist - I'm just a country doctor" when asked to address the issue of the lack of credibility of the story as stated scientifically. (Tossing out New Age mysticism thereafter as the underlying science is usually the End Game...they have about one week left before they disappear.)
