Well, I've thought about this plenty of times; thought I'd share.
You know how if you do certain things all throughout the game, it always has an effect on the outcome/ending?
Well, if you think about it, that's a real strong connection to life.
However, in the game it's almost like the character knows the entire time what path/choice to take, like you always know the right decisions to make without actually knowing them.
So, unless you actually know the other ways to make other endings happen, you'll probably end up with the same ending everytime.
But if you think about it, that would mean that the battle with Fate in Chrono Cross would be next to pointless, because if you're trying to beat Fate, when you can't control it anyway, then what's the use?
It's kind of like saying, all time is pre-decided, but at the same time it's not.
Like, Fate that you can control. That's the only explination really, but at the same time it links back to reality and real life, beacuse that's how it is here.
You do something, there's always a reaction or something that comes from it, and your Fate always changes every split second for the decisions you make the second before that. Thus, the Action-Reaction Theory.
And did you ever wonder, when you kill Fate, wouldn't that mean that there's nothing left?
Beacuse if you kill Fate, and Fate's real, then there'd be no future for anyone, so really, in Chrono Cross, after you kill Fate, then shouldn't everyone be dead?