Chapter 4 · Lab

How multiverse-y is your story?

Not a real posterior — a dial board. Crank the assumptions that usually push cosmologists toward “probably a multiverse.”

How well does inflation explain flat + smooth?80

Do your favorite models inflate eternally?70

Comfort with unobservable predictions?55

Need for one-universe special pleading to stop bubbles?65

Toy “lean” score (0–100). High ≠ proof. High = the chat’s instinct: math pressure toward many regions.

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What the dials mean

Inflation success — if you already trust inflation for CMB/flatness, you inherited its larger implications.
Eternal behavior — many potentials keep inflating somewhere forever.
Unobservables — horizons hide other bubbles; science still uses causal structure all the time.
Special pleading — forcing “exactly one bubble” often means extra assumptions, not less.