Summary

Quantifies personal identity across QBU branches. Phenotype stability: Genotype diverges rapidly (near-zero measure); phenotype persists robustly (developmental redundancy). Timeline count: ~10^(10^9) timelines (“Gigaplex”) with recognizable phenotype over 80 years (2.5×10^9 quantum events). Measure vs Count: Exponential branching creates vast timeline count, but total Measure = 1 (distributed across branches). Extreme longevity scenarios: (1) No tech: Measure ~0 for >120 years. (2) Moderate tech: Measure ~10^(-5) to 10^(-10) for 200-300 years. (3) Radical tech (singularity): Measure ~10^(-2) for 10,000+ years (1% chance breakthrough × 99.9999% yearly survival). Insight: Extended lifespans plausible given technological breakthroughs, but not guaranteed—measure matters more than timeline count.

Tags

Cross-References

  • Related: Quantum immortality, anthropic reasoning

Notes

  • Quantitative analysis
  • “Gigaplex” = memorable term
  • Distinguishes count from measure (crucial)
  • Optimistic on tech-enabled longevity
  • Cites Bostrom, Kurzweil, Wallace