Quantum Immortality

What should you believe will be the likely cause of your survival if you are an AI Doomer who believes in quantum immortality? An AI Doomer believes that if their understanding of AI existential risks is correct, humanity must get extremely lucky to survive. A person who believes in quantum immortality thinks that the many-worlds interpretation of quantum physics implies that their consciousness will necessarily continue in some branch of the multiverse. This article shows that combining these two beliefs requires rejecting or going beyond simple Bayesian reasoning when estimating one's most likely cause of survival. Such estimates may have practical implications for investment decisions, reputation management, and anthropic shadows.