Comment by fearmerchant

This comment reads as if it were dropped into a generic "genetics of lifespan" thread,. The Dynomight article is already making a much more sophisticated version of some of these same points. The article's central argument is precisely that heritability is a contingent observational statistic, not a Platonic form. This particular article isn't conflating heritability with genetic mechanism at all. It's interrogating a simulation model and its assumptions. The warning about "unqualified instruments" and "retrospective observational data" feels off as this paper isn't a straightforward observational study. it's a parametric simulation fitted to twin registry data.

This comment might be very useful in a Reddit thread full of people saying "50% of lifespan is in your DNA," but it's a bit off-target as a response to this particular article.