There is an area in the world where people live at high altitude.
People from the lowlands might climb up to that small city. Some would suffer altitude sickness and be delivered downward. Some would be able to live, but the lowland women would not have children.
Only the original inhabitants bore children. So it was, for many centuries. Lowland families eventually took hold in the community.
It was just this kind of history that attracted genetic investigators.
The genetic tests showed relationships with the lowland visitors were partially successful in producing children.
It was a data assessment that suggested children were sometimes born outside of marriages.
That suggestion ignored a common practice of adoptions in small communities. Orphan children simply taken in and named as simply new children.
An honest misrepresentation of data, presented with a smirk? A slant to the results?
We live in an age of unreliable conclusions.