they say a boltzmann brain is expected to occur every 100 trillion years or whatever. What portion of events don't repeat or repeat very rarely.
wtf is a boltzmann brain
random quantum fluctuations should randomly create brains in space for a couple moments over a long enough time scale, and one of associated problems is boltzmann brains and boltzmann brains should far outnumber human brains and earths on a long enough timescale.
4%
4.1%
Quantum tunneling and fluctuations should lead to a new big bang leading to a universe similar to our own somewhere on the scale of (https://wikimedia.org/api/rest_v1/media/math/render/svg/7652cd6b72d784979f0c5f4514d5c693dfe83f3c) years, so I'd say that's pretty unrepeatable
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I feel like this question has been asked before.