Task: Question Generation
Input (English): The data indicate that the individual was from a population directly ancestral to present South American and Central American Native American populations, and closely related to present North American Native American populations. The implication is that there was an early divergence between North American and Central American plus South American populations. Hypotheses which posit that invasions subsequent to the Clovis culture overwhelmed or assimilated previous migrants into the Americas were ruled out.
Output (English): Theories that there were invasions which overwhelmed or assimilated previous migrants into the Americas have been what?