Tegmark is explicit about his assumptions elsewhere. For an overview, see https://en.wikipedia.org/wiki/Mathematical_universe_hypothesis https://en.wikipedia.or

Tegmark is explicit about his assumptions elsewhere. For an overview, see https://en.wikipedia.org/wiki/Mathematical_universe_hypothesis https://en.wikipedia.org/wiki/Mathematical_universe_hypothes.... Indeed, it's not the only productive line of thinking in physics.