– Why do doctors care so much about your BMI when it’s has been proven to be such a flawed metric for ones actual health?
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We cannot measure health and fitness directly, because unlike height or number of arms, health and fitness are not exact perfectly defined quantities.
Instead health and fitness is a bit fuzzy. It has to be measured indirectly and any indirect measurement is going to be imperfect, but imperfect is not the same as useless.
IQ is an imperfect measure of intelligence, but if one person scores 70 and another person scores 130, that doesn’t tell you NOTHING. You just have to take the information with a pinch of salt.
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