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The Importance of Effective Field Theory
The idea of an effective field theory is you can do quantum field theory perfectly well at energies below the ultraviolet cutoff. Even if space and time themselves exist above the ultraviolet cutoff, you don't need to know that. It will not show up in your low energy effective quantum field theory. The book's not going to be out until early next year, but keep your calendars ready for 2024 when the biggest ideas volume two comes out.