@Jeremy_Christian (@swamidass):
There is not much point to devising a new scenario unless it solves some problems:
One or two Genealogical Adam scenarios simultaneously resolve the following:
- who did Cain marry;
- for whom he built a city;
- a plausible way to have an historical Adam and Eve;
- while not having to overturn all of modern science.
These same models imply that the only plausible flood is a regional flood (since the point of the scenarios is to provide for a historical Adam/Eve, not a historical global flood).