ko'a viska re nanmu goi ko'e joi ko'i
Assigning pro-sumti with quantified expressions can be tricky. If the quantifier is under the scope of another quantifier, a negation, or perhaps something else, the assigned ko'a won't make much sense outside of that scope, or else it will force the quantifier out. Example:
mi na viska re nanmu goi ko'a joi ko'e
i ko'a cu clani i ko'e cu tordu
Does that mean "It is not the case that I saw two men, ko'a and ko'e. Ko'a is tall and ko'e is short."? If it does, then {re nanmu} is gaining scope over {na}, thanks to {ko'a joi ko'e}. Otherwise the sentence is meaningless, because "It is not the case that I saw two men" does not provide any referents for ko'a and ko'e outside of the scope of {na}.
It actually migh not be a bad idea to have this possibility for scope leaping.
mu'o mi'e xorxes