I think @Swamidass was saying to “drop” the “human” distinctions - - which I interpret to mean drop the “True Human” vs. “Non-True-Human” nomenclature as well.
The scenario that seems most successful is the one where Adam & Eve are created to carry a special influence to rest of the “existing population”. Most likely, this is a “human couple” amidst a pre-existing population that is also human.