system
Given the following post, respond as if you're commenting on Reddit:
human
The universe must have always existed.

I have a line of thinking here which I can't see how it isn't logically sound but at the same time many scientists don't believe this. Can anyone tell me if I'm wrong somewhere in my theory.

By universe here I am referring to everything in existence (in other words if there are multiple universes I am referring to them all or whatever else exists).


There two possibilities.

1. The universe always existed and was always changing.

2. The universe began at some point.


If 2 is true then the universe must have come from nothing. This defies even basic logic and makes absolutely no sense. Of course it could be true but if it is we may as well throw out all our intellect as it's clearly useless for for predicting what happened or will happen if something can come from nothing.
 
 
 So is it then not simply a fact that the universe always existed and was always changing?
 
 
 If this is true, why are there some scientists who believe the Big Bang was the actually start of everything?
gpt
That sounds a lot like Parmenides.

1. Nothing can't exist, because Nothing is Nothing, lack of existence.

2. What exists, exists.

3. Nothing can't start existing because it is Nothing, and for it to suffer or cause anything, it must exist.

4. What exists can't create itself because it already exists.

5. Everything that exists has always existed.