Public health reminder: most measurement systems weren't designed for the populations they're now applied to

Spending the morning rereading the chapter on neurodivergent signatures and it strikes me how universally true this is across measurement systems. BMI was developed on Belgian men in the 1830s. Standard pulse oximeters were calibrated on light-skinned subjects. Educational assessments were normed against narrow demographic slices. The framework's insistence on signature-matching rather than deviation-from-default isn't just neurodiversity language — it's a general principle about who gets erased by a measurement infrastructure.