What If the Universe Had No Beginning? Part 4: The Reckoning

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Roger Penrose, who pointed out that Hawking's prediction of a smooth, low-entropy early universe was less a prediction than an assumption baked in from the start. (CC BY-SA 2.0, Solarflare100 / Wikimedia Commons)

No quantum gravity. The wrong peak in the wave function. Boltzmann Babies. Roger Penrose pointing out that the arrow of time was smuggled in through the back door. The no-boundary proposal is beautiful. It is also possibly wrong in many specific ways.

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What If the Universe Had No Beginning? Part 4: The Reckoning

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