Here is an argument:

"The universe isn't a set. A set is a mathematical construct defined axiomatically. A set is a mathematical model that's useful for describing many things. There are many things in the universe that can be modeled very well using set theory. But that's entirely different from saying that the universe, or that anything in the universe is a set. A mathematical model is not the thing that it models.

There are also many things in the universe that cannot be modeled very well using set theory. (For example, try to put together a meaningful set-theoretic model of vacuum fluctuation and hawking radiation based on the set of particles in the universe. It really doesn't fit well.)"

1. Is the above argument correct?

2. Can Universe be described as a set?