Question: Why is this an accurate simulation for haplotype distributions? A Gaussian distribution is essentially pure noise except for the mean and the variance. @DennisVenema is claiming that the existence of TMRCA values > mya is a legitimate signal of ancestry, not just noise. If the observed PDF across the genome is the result of a stochastic process that makes some regions seem younger than the ground truth (as measured by TMRCA), then the noise should not be interpreted as nullifying the signal from regions at extrema that point to a very ancient TMRCA.
Does that make sense?