I think it's: Integrate from t = now to t = infinity (prob(he dies at time t) x prob(she's still alive at time t) x dt)
But that leaves the problem of manipulating whatever data you can get into the form of the probability distribution functions above.
@moth started
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I think it's:
Integrate from t = now to t = infinity (prob(he dies at time t) x prob(she's still alive at time t) x dt)
But that leaves the problem of manipulating whatever data you can get into the form of the probability distribution functions above.