How do Level II universes differ fundamentally from Level I universes?

Answer

Level II universes can possess different fundamental constants, dimensions, or effective field theories.

Level I universes share the exact same physical laws and constants as ours, differing only in arrangement of matter. Level II universes, arising from different inflationary breaks, can have altered fundamental constants and laws.

How do Level II universes differ fundamentally from Level I universes?

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