Comments by "kazedcat" (@kazedcat) on "TREE(Graham's Number) (extra) - Numberphile" video.

  1. He is talking about bubble multiverse. The multiverse itself is infinite but the bubbles embedded on it is finite and each bubble have unique physics inside them. So a universe is define as a finite bubble with a unique set of physics. Going outside the bubble the physics changes and you are on either a different universe or the great void between universes.
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