> The sample size = 1 may not be enough to perceive any meaningful difference Yes, and I assumed this was obvious. I did say "expect", after all. But a large-N

> The sample size = 1 may not be enough to perceive any meaningful difference Yes, and I assumed this was obvious. I did say "expect", after all. But a large-N experiment where each child is in the "isolated" condition is totally different from a large-N experiment where a large population is transplanted. > Migratory waves are not made of 1 infant with no parents. Whether immigrant communities preserve culture etc is not in question. I'm only refuting the point that there is a large genetic component, and your argument here effectively concedes that.