Over a decade in Denmark, the boundary between those diagnosed with ADHD or autism and those who are not has quietly blurred — not because the conditions themselves have changed, but because the act of diagnosis has. A study of more than two million children reveals that the children now receiving these labels increasingly resemble their undiagnosed peers, suggesting that rising prevalence numbers may tell us more about how societies recognize difference than about how often difference occurs. This is a story not of epidemic, but of expanding perception — and it asks us to hold our statistics