The habitability of planets around longer lived stars is a crux for those using SSA, but not SIA or decision theoretic approaches with total utilitarianism.
I show in this section that if one is certain that there are planets habitable for at least 20Gy , then SSA with the reference class of observers in pre-grabby intelligent civilizations gives ~30% on us being alone in the observable universe. For 50Gy this gives ~10% on being alone.
The habitability of planets around longer lived stars is a crux for those using SSA, but not SIA or decision theoretic approaches with total utilitarianism.
I show in this section that if one is certain that there are planets habitable for at least 20 Gy , then SSA with the reference class of observers in pre-grabby intelligent civilizations gives ~30% on us being alone in the observable universe. For 50 Gy this gives ~10% on being alone.
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