Unlimited Universe: Can We Explain It?

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Discussion Overview

The discussion revolves around the concept of an unlimited universe, exploring the challenges of understanding infinity in both physical and mathematical contexts. Participants express their difficulties in comprehending the notion of something being unlimited, drawing parallels to natural numbers and discussing the limitations of human perception and cognition in grasping higher dimensions.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants express that the inability to perceive the limits of the universe may contribute to the difficulty in explaining its unlimited nature.
  • There is a suggestion that the human brain may not be capable of fully comprehending concepts of infinity, with mathematics being the primary tool to approach such ideas.
  • One participant raises a question about whether the challenges faced in understanding infinity also apply to concepts in linear algebra and infinite series expansion.
  • Another participant notes that current physics indicates the finite speed of light limits our understanding of the universe, distinguishing between the "observable universe" and the entirety of the universe.
  • Concerns are raised regarding the discomfort theorists feel with infinities, which are useful mathematically but problematic when applied to real-world scenarios.

Areas of Agreement / Disagreement

Participants generally agree on the challenges of understanding an unlimited universe and the limitations posed by human cognition. However, there are multiple competing views regarding the implications of infinity and its role in both mathematics and physics, leaving the discussion unresolved.

Contextual Notes

Participants highlight the dependence on definitions of infinity and the observable universe, as well as the unresolved nature of how infinities manifest in physical theories.

aceace
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Somebody say if you are not there, you don't understand what's happending there.
Is that the same reason that we can't explain why this universe is unlimited just because we can NOT get to the limit of the universe if it does exist.
Anyway, I can't understand something is unlimited, just like a natural number can grow up forever.
 
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aceace said:
Anyway, I can't understand something is unlimited, just like a natural number can grow up forever.
As I've said before, there's no such thing as a dumb question if you're really seeking an answer. In this case, I don't think that the human brain is capable of comprehending something like that as a physical structure. Mathematics is the only way to get a handle on it. You can build all of the hypercube models you want to, and still not be able to 'see' the time dimension. Same for a finite, yet unbounded, entity such as the universe. There are too many dimensions to be dealt with by a brain that can only detect 4 of them and see 3.
 
aceace said:
Somebody say if you are not there, you don't understand what's happending there.
Is that the same reason that we can't explain why this universe is unlimited just because we can NOT get to the limit of the universe if it does exist.
Anyway, I can't understand something is unlimited, just like a natural number can grow up forever.

Do you also have the same problem with linear algebra and infinite series expansion?

Zz.
 
aceace said:
Is that the same reason that we can't explain why this universe is unlimited just because we can NOT get to the limit of the universe if it does exist.

That's basically correct. Current physics suggests that the finite speed of light limits what we can say about the universe. That's why we have to make the distinction between an "observable universe" and the entire thing (there are a variety of terms in use).


Anyway, I can't understand something is unlimited, just like a natural number can grow up forever.

Practically speaking, I think theorists tend to have the same discomfort with infinities. They make for a nice mathematical tool, but we get worried whenever they seem to show up in real life.
 

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