what do you suppose "flux in and out of existence" means?
I am talking about the Heisenberg Uncertainty (well, something analogous to it).
https://en.wikipedia.org/wiki/Uncertainty_principle
In physics, atoms and other tiny entities have a bit of a probabilistic existence, where things such as position and momentum are not fixed. Like the famous cat who is alive dead or both.
Edit: In case that wasn't clear, things in the universe can pop in and out of existence. So a vacuum is only empty on average. In reality, particles are popping in and out of existence in that vacuum all the time. The universe could be the product of a similar process, where the "vacuum" is the average state, and we happen to be living in an above average situation.
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