Flynn's analogy: if we observed a female sample that appeared elite but actually was mildly elite, this would eliminate the mean height gap between men and women but would not eliminate the growth spurt pattern (girls peak at 14-15, boys continue to 18-20) or complexity differences in athletic tasks (women struggle more with triple axels), because those patterns are genetic; therefore, if Eyferth's sample was only mildly elite yet eliminated the g-factor gap, this suggests the g-factor gap is environmental.