In one day our universe will decay to one with a smaller cosmological constant. Even if that takes a very long time to happen, there's an enormous fundamental difference in what you might think a quantum gravity theory should look like depending on whether or not that happens. Lenny Suskin: The Boltzmann brain problem as my yep, that is sometimes called a Boltzmannbrain problem. So I like to call it an inconsistent consistency between theory and observation.

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