Tag Archives: eternal inflation

Things I Don’t Believe

Victor MeldrewI started 2022 with a post titled Things I Think Are True. It was an echo of the Hard Problems post I’d done to start 2021. That earlier post listed a (possibly surprising) number of open questions in physics. Not trivial questions, either, but big ones like: “What is time?” and “What is the shape and size of the universe?”

The post in 2022 was more of an opinion piece about things that, in the context of those open questions, I think are true. Pure speculation on my part, some of it close to mainstream thinking, some of it rather less so (but all, I would argue, grounded in what we do know).

This year, for contrast, I thought I’d make a list of stuff I don’t believe is true.

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How Many Big Bangs?

Bang!!

I’m reading Our Mathematical Universe (2014), by Max Tegmark, and I’ll post about the book when I finish. However he got my attention early with the topic of eternal inflation. That got me thinking about how there are some key unanswered questions regarding the Big Bang and inflation of the non-eternal sort.

Inflation certainly does need some explaining. It may be related to dark energy, as both seem to do the same sort of thing (push space apart). The putative physics of inflation is bad enough; eternal inflation is (in my view) fairy tale physics.

For one thing, eternal? Seriously? Infinite something from nothing?

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