Evolution isn't completely proven, either. But, there are theories based on physical evidence which support it. Similarly, Einstein himself had theories on time travel.
Please, don't get me started on Evolution...
Yes, but again, reason does not work in the Chrono Cross universe in regards to time travel. Chrono Cross's entire position on time is that it's unpredictable, fluid, and "volatile". And that completely contradicts that "reason" can suddenly map it out entirely.
Incorrect. The point of Chrono Cross, and Trigger, is that time is changable. Not unpredictable. The fact that its series canon that it is Belthasar's plan disproves the notion of time being unpredictable. The theme is people are free to change their future.
Yes, but Dinopolis didn't. Nor did a universe where Lavos never fell. Basically, that time should have already been in the Tesseract waiting for deletion, along with billions upon billions of others.
Incorrect. Although we don't understand the means and whys of dimensional creation, we do know that the Reptite dimension was created before Lavos crashed. So that dimension was even in existance during CT. The Reptite Dimension was there all along. Remmber, dimensional creations are special cases that defy the normal rules of timeline creation.
The reason I don't like this theory is because there are too many "what ifs" that go along with it. If he had the ability to travel in time and "experiment" whenever he wanted, why didn't he simply enlist the Chrono Team (or even Magus, who was DESPERATELY looking for his sister) for help? Why make a complex scheme to do everything when he could simply achieve the same goal with a more hands-on approach? Better yet, why not simply go back to 12,000 AD and stop Schala from disappearing in the first place?
1-Because his plan needed the Arbiter of the Flame, Serge. If he simply wanted to kill the TD, he probably would have, but he did.
2-Because his plan needed the Arbiter of the Flame, Serge. Plus, hes an old man!
3-We have several answers. One, this would have not stopped the Time Devourer from being created, since Schala had already been transported to the DBT to merge with Lavos. Two, how would he have been able to? Hes an old man. Three, the Time Bastard theory makes this impossible. When the original Schala was transported to the DBT, the second version of Schala should be removed at the time the original one is removed. Read up on the Time Bastard theory for proof and arguements on its behalf, I don't wish to discuss it here.
Also, there'd be no way he could "reboot" or retry his experiment if it failed. For the "plan" to work, he'd have to do it all in one go. After he left 2300 AD, with Another World already created, there'd be no original time to go back to in order to try it over again.
... How? He could easily retry his experiments. Another World isn't the one thats created, Home is the false world. Another is the original one.