Journal articleprimarysupportsVerified

Is our universe likely to decay within 20 billion years?

Don N. Page · 2008 · Physical Review D, 78(6), 063535

Spiritual Evidence Map/Last updated May 10, 2026/Claims v1.0.0-provisional/Sources v1.0.0/Scores provisional

Summary

Argues that to avoid the conclusion that we are typical Boltzmann-brain observers, our current vacuum must decay on a timescale comparable to or shorter than the natural Boltzmann-brain nucleation timescale — in some models, less than ~20 Gyr.

Why it matters here

The clearest statement of how the Boltzmann-brain count is tamed by a finite vacuum lifetime; companion paper to 'Return of the Boltzmann brains'.

Linked claims

Evidence score 1/10

Boltzmann brains

In a long-lived, accelerating universe, random thermal fluctuations could spontaneously assemble a self-aware brain with false memories of a coherent life. Several modern cosmological models appear to predict such observers should statistically dominate — which is widely treated as a reason those models are wrong, not as evidence about you.

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Topic hub

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Skeptical frameworks

Cryptomnesia, anoxia models, cold reading. Counter-anchors.