Gengar003 wrote:When I say "the universe," I mean "the visible universe," yes, but I also assume that, since I've assumed the universe as a whole will one day stop expanding, it will one day ALL be visible (nevermind that there'd be nothing to see).
Well
Primo: you haven't proven it will stop expanding. BTW, most of current theories claim the expansion will be accelerating.
Secundo: even if the expansion was to stop, the universe could have been infinite to start with. And visible universe will always stay finite, as we've proven a while ago.
Tertio: Apparently you do not understand the term visible universe.
"Visible universe" reffers to the part of time-space, that's available to us for observation. Note, it's time-space, not just space. It's that backward/downward cone part in the 4 dimentional chicken picture.
For example- sun 4 thousands years ago belongs to our visible universe- we can measure many things about it by the traces left in the ice caps, on the trees and buncha other things by examining the samples.
sun 8 minutes ago belongs to our visible universe- you can measure it's properties by looking out of the window.
sun 1 minute ago DOES NOT belong to our visible universe. Perhaps it turned black, or went nova one minute ago, we won't know it untill one minute passes.
Even if our little solar system was the whole universe, the visible universe wouldn't be covering the whole thing!!!
Gengar003 wrote:If the universe is NOT infinite in volume, [...], then when you reached the "edge" of it, what would you find if you went beyond?
You think you've proven the universe is finite, which you've not.
But even if you make that as an assumption, you're still wrong.
Even if the universe was finite, it wouldn't need to
have an edge.
*sigh*
It's really unfortunate the bigger part of the population suffers "brain shutdown" the moment anything resembling
math is involved.
And unfortunately, the universe, at both small scales (quantum mechanics), and large scales (general relativity), doesn't follow the "common sence" as developped by observing the moderate scales- as a result, to explain some details of the modern science, you need some
math.
Or one could try to explain using a model- thus reffering to the comon sence, but one need to be caureful with that- more about it later.
The real disaster happens when people who do not understand the basics, are producing gibberish because to them (unable to tell real math from non-math due to the brain shut down syndrome) it sounds just like the real thing.
We could theorize that dark matter is dark because it's a whole new class of antimater, blahblahblah "edge" blahblahblah "outside"

That's like posting
Perhaps are 4 more blood groups: AB,AC, C and CC!
Except the later is obviously wrong (common sence), while explaining why the former is ridiculous requires you to use terms that sound
dangerously math-like thus inducing a brain shutdown in the person.
After they recover from the shut down, they go back to proclaiming: "I still believe this or that, because I think that *repost the gibberish* and that's how I feel it may be"
Let's take your repeated saying "If the universe is finite, what lies beyond the edge", repeadetly using oil+water example to prove "there MUST be an edge, and there MUST be interaction"
You're using a 3 dimentional euclidean example to argue universal laws about 4 dimentional non-eucliedan case.
Sorry to say that, but you're like a medieval artist, trying to convey volume without even knowing about perspective.
Ocassionally you get a detail or two right, but overall, it's rather sad thing to watch.
How could I explain it to you?
To explain all detail I'd need to put you through half year course on multidimentional manifolds. And the prerequisites, like vector spaces, matrix algebrae...
Alternatively I could use a simplified model. But a problem about a model is that it is _simplified_- it explains some features of the theory, and you need another model to explain the other ones. And when using a model you need to rememer which features it explains and which it does not, and also what parts of the model represent the elements of reality, and which do not.
Model doesn't show the whole theory, and hence, there's a risk of misunderstandning.
For example the baloon model is the very model used to explain how universe can expand without an "edge" and without an "outside" to expand into.
The baloon's surface represents the universe, as the baloon inflates the space around every point is expanding away from that point. All the dots are moving apart... yet there is no "edge"- the dots aren't moving into any "outside", it's just that the space they rest on is expanding- the amount of space INSIDE the universe is increasing, but it's not because the universe is stealing space from some OUTSIDE.
The air inside is just a side effect of the modelness- it's there just to make the expansion possible, it represents nothing.
But you misunderstood it.
You thought the important parts of the model were the baloon's inside, that it represented the universe, and the air in there was some matter being added to universe. While in fact these were the irrevelant parts.
And you failed to realize the lack of center, edge and outside, that the model is all about!
Apparently, the baloon example, is too complicated for you to understand, so look here for something simplier:

That's a one-dimentional universe.
It started at t=0, in the red spot at the middle.
Then it started expanding, and after one year galaxies and stars formed. For the next few years the stars and galaxies are moving apart, though gravity creates some attraction here and there.
Okay, what can you say about that universe?
Is it finite? Yes.
Is it expanding? Yes.
Does it have an "edge"? No.
Is there an "ouside" and "inside"? No. (The areas that might look outsude and inside are in fact the future and the past)
And that's it. You spend a lot of time trying to assign properties to the "outside" (eg. that it obeys some laws of our physics), but you fail to realize the outside does not have to exist.
It "could" exist, why not, just like the chicken singularity, but the Ockham's razor suggest we shouldn't bother worrying about either.
You could as well assign laws of physics to flying pink elephants, which would at least be funny.
Gengar003 wrote:Nonexistence, if present, exists. It's mind-boggling. It's confusing.
And you probably think you're sounding smart. Right?

Just because we can't explain it's gibberish
in a way you'd understand, doesn't make it right.
Reffer to the mind shutdown syndrome described earlier.
Gengar003 wrote: I just said that nonexistance WAS something, a "lack," which it couldn't be if it didn't exist.
Now you're just playing with semantics.
Some things do not exists, hence "nonexistence" exists- it's a 12 letter word in english, starting with n, which can be used to describe state or quality of being non-existent.
But then you use it to argue a physical entity/place, relating to that word exists.
And then you even say that "it doesn't make sence, yet it has to be so"
It's incorrect- if it doesn't make sence, it can't be so.
That's commonly known as "Reductio at absurdem"- you assumed something you called nonexistence exits, but the qualities of the obiect lead to logical contradiction (not making sence), hence the oryginal assumption ("nonexistence exists") must be false.
QED.
Unless of course, you can define the nonexistence in a way that's not internally contradictent.
Gengar003 wrote:Using words to accurately describe it is pointless[...] It doesn't make sense, yet it has to be so.
Woah! That's a pseudo-science gambit I haven't seen before!
"My brilliant scientific theory is so innovative even I don't understand it! Hence, I can't explain it in all detail, and hence all you can refute are my imperfect explanations, but my perfect theory remains true!!!"
Gengar003 wrote:I'm arguing FOR a specific position here. Usually, when people do that, they don't argue their counterpoints.
Umm. This is science, not politics.
You can't argue FOR a specific position just disregarding the evidence to the contrary.
For example you can't reasonably argue "There is no energy conservation rule, because the plants grow out of small seeds, and then produce new seeds. In that process energy is created out of nothing because one seed can create any number of them with no cost at all" without considering the counterpoints like ground and sun that deliver the energy and materials to the plant.
Gengar003 wrote:Discuss!
I'm kinda tired of "Discussing" cosmology when the other party hasn't even read
one page explaining basic misconceptions about the subject.
Want to "Discuss!"?
Here's a homework for you (should be easy enough):
1) R
TFM
2) prove the following quote wrong, for example using a quote from the FAQ
Homework- a quote to be proved wrong wrote:
"dark energy -- the energy density (energy per unit volume) remains approximately constant, while the volume increases as the universe expands, so the total dark energy increases.", hence our universe is not a closed system.
If you fail to do so, I'll assume you haven't read the page, or haven't put an effort into understanding it, hence rendering the further discussion pointless.