Extrapolating this line of thought: Let us say, two identical twins are brought up the exact same way. Can we be certain they will have exact same longevity? T

Extrapolating this line of thought: Let us say, two identical twins are brought up the exact same way. Can we be certain they will have exact same longevity? Their genetic make up might be similar but there are trillions of stochastic processes happening every moment at the cellular, and each one is capable of a cascade effect in the long run. I think it would be reasonable to assume that scale of precise personalized prediction / recommendation will be a distant possibility, if ever it is even possible. We might get capable of creating extremely good probabilistic models however, with less than a quarter of the modeling resources by quantifying the different parameters of life taken statistically (e.g. average calorific intake, medicine dependence, exercise etc). That might actually get very close to examining the uncertainty about health & longevity.