Okay, what they do in Termina affects Termina and what they do in Hyrule affects Hyrule. Link helping Anju and Kafei in Termina has absolutely no affect on Hyrule's history. Only what they do in one place affects that place, not the other. And your claim that chaos would occur is absolutely unsubstantiated.
Um, have you any idea how time works? If something can travel from one place to another at will, time is affected. If Skull Kid is travelling back and forth, both Termina and Hyrule's histories are changed.
Yes, Link's absence from Hyrule affects Hyrule's history, but does his presence in Termina affect Hyrule's history? No.
Uh, those are two same things. Link's absense from Hyrule is the same as his presense in Termina. Therefore his presence in Termina DOES affect Hyrule's history because, logically, it means he's otherwise absent from Hyrule when he otherwise would not be.
That's not true. That's why I said that Tingle or whoever else probably found another way out of Termina, not through the Clock Tower. The Clock Tower seems without a doubt to lead to the Lost Woods of the Child Timeline, but somewhere else could take you somewhere else, see what I'm saying?
Except that that, unfortunately, is fanfic. As far as we know, there's one way in, and one way out. Skull Kid travels to and from both worlds with no indication that he is travelling across timelines.
And all of the histories are running parallel to each other. Hyrule's history would have a similar point of origin, but from there they would be parallel.
No they wouldn't. Parallel means they need a constant connection. Once a split occurs, there is no connection from then onward.
And all of the dimensions would share a common origin in the very beginning; the creation of existence. From there, things would diverge. But all of reality was created by something, and likely the same thing. They'd all have that in common.
Aaaand? So? A timeline isn't the same thing as an alternate world. It's an alternate timeline, not an alternate planet.
See, that's why I said there would have to be another way out of Termina. As far as we can see, the Clock Tower only leads to the Lost Woods of the Child Timeline, and vice versa. There must be some place else that could lead to the Adult Timeline.
Um, no, there must not be, firstly because that's impossible, and secondly you only want there to be a way there so it fits your theory.
Direction is meaningless in space, as well.
I think you'll find it isn't. You can't get to Mars just by going in any direction. But that's beside the main point.
There is no quantification or qualification, except for light-years.
Um, that's just not true.
But since these are gaps between dimensions, it's likely light doesn't even reach there. So, no measurement of distance is possible.
I was using direction as a metaphor, anyway, a way of explaining it. It doesn't mean it goes in a literal direction.
And I fail to see your reasoning that the adult timeline wouldn't be parallel to the child timeline. Of course it would be. They share a common origin, and then their paths diverge, like a fork in the road. Aren't the right and left forks parallel to each other?
No, often forks go off in completely different directions. This isn't a dual carriageway. The point is, once a split occurs, there is no way to connect the two timelines together again. They are not linked. There is no weird portal that could take you from one to the other. It's completely different from a parallel world.
And I find it funny that you'd say that timelines that share a common history to some degree wouldn't be parallel,
There's no such thing as a 'parallel timeline'. One change in the past sends history off in a completely different direction. Like I said, there's no tie. There's no portal. There's no rope holding the realities together. Parallel worlds, meanwhile, *need* a link. Take the Twilight Realm - does anyone think that travelling to and from the Twilight Realm will send you into a completely different timeline? No, of course not. Why should it?
As I said above, they are all parallel, since there is no distance or direction in space. It would theoretically be possible to get anywhere, albeit through different wormholes. The Clock Tower leads to the Lost Woods of the Child Timeline. Some place else must lead to the Adult Timeline.
You're assuming that there is more than one portal. Why? Why would there be more than one? Also, it's not a wormhole. A wormhole is something very different. You couldn't ever fall through a wormhole. And as far as I remember, a wormhole would not take you to another reality.
Fyxe - have you replayed the fight with Veran just recently to check that? I'm just wondering, because you now seem very confident about when she says which line and when she transforms, while before you didn't remember her saying anything about true forms. So she definately says the 'you've seen me in this form' bit while in human form, then transforms and says the true form bit?
And it's Ambi, but Nayru. Yeesk, Nayru doesn't look anything like that 
EDIT: I see Arturo mentioned the Ambi thing as well...
Firstly, yes, I forgot which order you fight Nayru or Ambi. Sue me.
Secondly, the dialogue reminded me how the fight went. You fight Veran in Ambi. You beat her. She appears in human form. She says 'you've seen me like this before' and then states she will now show her true form. She changes into the fairy monster. Beat that, then she states the line about her hideous form. I'm 99% certain that is how the fight went.
I have no point to prove, and I'm only posting because I saw this argument and thought I could clarify. She does indeed say "true form" while as a "human". Now this alone might not be much since she could be talking about the form she's about to show, but I don't think that's the case. Remember, Link had rarely seen her like that the entire game. She mostly took the forms of other people and presented that to Link. So indeed she would speak truly if Link only saw her like that once (I don't remember if he did though or where in the game it would be). She speaks of her true might as if her upcoming form might be her true one, but I think she mostly means that her power has been somewhat checked up to that point, and now that she has assumed her own form, she can properly demonstrate her power, even if she has to transform to do it. The fact that she almost never shows herself as...well, herself...is absolutely paramount to this point.
No offense, but what are you babbling about?
It's fairly simple. You beat Veran when she's a shadow possessing Ambi. Then she appears as a human. She states 'you've seen me like this before', which is true, we have seen her as a human before. Then she states 'but this is my true form'. Then she changes. Therefore, her true form is the insect fairy thing. The word 'but' is very significant. If she had meant her human form was the true form, she would not have said 'but'.