Could the universe suddenly disappear for no reason at all?

No its impossible. The universe contains everything that happens. Only a subset of the universe can have something done to it. Even then nothing just dissappears let alone instantly.

I know you lre shitposting but there.

>>8726377
>The universe contains everything that happens
But I thought people said there may be more universes than just this one? So hows this universe 'contain everything'?

>>8726371
If it appears out of nothing, it can disappear into nothing.

>>8726379
Think about it. Whats is a universe if not a totality? When you talk about something beyond the universe you are breaking its definition. You can have alternate routes for events that occur and map them out as their own alternate universe, that is understandable, but our reality is one universe moving along a line via a point of no measure called the present.

>>8726385
It didn't appear out of nothing. The big bang theory says nothing about it being created, just that at some point, a long time ago, it was dense and then expanded.

>>8726371
I'm not sure if it's exactly what you're asking about, but you might want to read a bit about vacuum decay.

>>8726371
God I fucking hope so.

>>8726397
>vacuum decay
it got me higgsy :3

>>8726371
If you mean the universe as we understand, then yes. Vacuum decay where the higgs field degenerates to a lower energy state because of quantum tunneling would essentially change the laws of physics of an area, expanding outward at the speed of light.

The entire universe? No. c is not really the speed of light, its the speed of causality. An event could not happen to all of existence at once.

>>8726390
No. A "universe" is an isolated system, u plonker.