A reason that is theoretical must be backed by experiments. You cannot have one without the other without entering the religious realm. And you cannot have a completely mathematical explanation of reality because your axioms must have experimental backing.
As I understand it, emergent means the behaviour of a collection of entities that comes about due to their interactions in a way that is not predictable from a full theory of its constituents.
The opposite of an emergent theory would be a reductionist theory.
Could someone explain, what is meant exactly by `emergent'? What is the antonyme?
For example. I mean can't we assume all standard quantum model implies all quantum phenomena are emergent?