The notion of valuing a life at age 15 higher than at age 5 is pretty reasonable. If the value starts at zero at conception, ends at zero at death, then -- if

The notion of valuing a life at age 15 higher than at age 5 is pretty reasonable. If the value starts at zero at conception, ends at zero at death, then -- if it's a continuous function -- there has to be a rising curve followed by a falling curve. And this seems to fit with some choices I'd make in contrived trolley problem scenarios. Though it's not the only variable, when you get to particularities.