Good reply, André.
We can use the word universe for general positions, such as "the universe exists in the Now" (and not in any other time).
Just like time, we cannot find a grounded basis to stand on with the word universe. But it can 'hang in the air' like a concept we can all understand.
I embrace Gödel's Incompleteness Theorems with gusto because he is the first person in modern times to get it right.
I know that he personally did not see everything in their right proportions (he made the universe a unit, which is not possible when his Incompleteness Theorems are correct). So, I do not mind keeping Gödel the person out of the equation.
But his Incompleteness Theorems show us that there is no Mathematical 1 at the overall level. The word universe can be used as a concept, but the word universe cannot be used as a unit.
It means that if we move to the grounded levels that we can then find accurate truths. Yet these accurate truths cannot be brought up to the overall level and help us create a completeness.
In an example, all the truths we can discover about males cannot be used to inform us the truth about all people. Same for all the truths we can discover about females cannot be used to inform us the truth about all people.
For his Second Incompleteness Theorem, we can still not take all truths we learned about all males and all females and achieve a completeness because we have to apply the fig leaves to Adam and Eve.
The word person can therefore never be made the same as the Mathematical 1 because no person in the world can portray all truths that all individuals show us. In other words, each and every person will be specific and miss aspects (show an incompleteness). No person will have all aspects common among people.