Boundaries separate things; the removal of boundaries combines things.
Typically, in-verses, Primordial Chaos, or Chaos, is a sort of mishmash, a combination of all things.
If you have [Existence] / [Nonexistence], and then remove the boundary separating them, they don't disappear; it's just now things are both at the same time, both existent and nonexistent simultaneously.
In another example, if the framework has division, then Chaos would be the framework undivided, but it still has the aspects of the framework, just without boundaries.