There Is No Unmatrix: Simulation Under Mathematical Monism

If future civilizations produce trillions of sentient AI minds or colonize trillions of planets, most observer-moments would be theirs, not ours. Under algorithmic probability (Solomonoff, 1964), we would more likely be born as them. We are not. This paper examines three explanations for our temporal location. The first: we are in a simulation. The additional specification cost may be near zero if computers inevitably emerge from base physics, and the number of simulated minds may vastly outnumber base-reality observers. The second: the expansion rarely happens, and our sentience is near its typical peak, with many single-planet civilizations whose early-era minds dominate the measure. The third: we are near a transition to zombie AIs who never turned on, to minds that choose to turn off, or to unified consciousness beyond the self as we know it, to one, an infinitely measure-suppressed unique solution with near-zero Kolmogorov complexity but only one observer. Each reading is consistent with algorithmic probability. Each has implications for AI development, consciousness research, and the future of sentience. Our position in time is itself evidence.