[jules]

Oh I wasn't aware that there were testable definitions. Then I consider it unlikely that the adults in the German family are either obese or overweight. On what are you basing your claim that their BMI is greater than 25 kgm^-2?

[eru]

Also BMI is getting phased out in favour of ratio between circumferences of hips and belly. It has much better correlation with lots of diseases than BMI.