Relevant axioms:
p) Anything that is hypothetically possible may or may not be existent; for it to be possible at all, existence must be able to accommodate it (Examples: unicorns, humans, trees, planet earth, atlantis, demons)
q) Anything that is hypothetically impossible, is non-existent; therefore existence can’t accommodate it (Examples: something that exists and doesn’t exist at the same time, a square-circle)
Part 1: The only possible definition of perfection
In similar fashion to how the semantics of “longest possible” and “infinite” are different, the semantics of “best possible” and “perfect” are also different. Whilst defining the best possible x within imperfect boundaries is possible, it is contradictory to define the perfect x within imperfection. With this in mind:
The only possible definition of perfection = something that is omnipresent, omnipotent, omniscient and infinite (infinite regarding the dimensions of, height, depth, and width within which all things exist and move.)
Part 2: Imperfect existence vs. Perfect existence:
The definition of perfection requires omnipresence. Existence and omnipresence denote the same thing. Only a perfect existence can accommodate perfection and for something to be meaningful, coherent and possible, existence must be able to accommodate it. Consider the following:
Existence = omnipresent thing which all things are a part of (anything that exists, is a part of existence)
Perfection = omnipresent, infinite, omnipotent and omniscient thing.
Perfect existence = omnipresent thing that is infinite, omnipotent and omniscient.
Imperfect existence = omnipresent thing that is not infinite, omnipotent and omniscient.
Imperfection = All things that can be bettered or more complete. Anything that is not perfection.
Conclusion: If existence was imperfect, then perfection would be an absurdity. Either existence is perfect, or perfection is impossible therefore logically absurd.
(edited: removed “Perfection denotes existence” from the “Conclusion”)