> Stipulation: if the baseline life-length is 80 years and a ninety year old dies, then the YLL is 0 and not -10. No, of course it isn't. A 90-year old isn't

> Stipulation: if the baseline life-length is 80 years and a ninety year old dies, then the YLL is 0 and not -10. No, of course it isn't. A 90-year old isn't expected to instantly die. They have some remaining live expectancy, maybe two or three years, even if they have passed median live expectancy.