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.
(This is Part 4 of a series on Hawking's no-boundary proposal. Read Part 1, Part 2, and Part 3 first.)
There's a reason that while interesting, the Hartle-Hawking no-boundary proposal isn't exactly … [+6442 chars]
There's a reason that while interesting, the Hartle-Hawking no-boundary proposal isn't exactly … [+6442 chars]