Garrett Lisi responds to criticism of his proposed unified theory of physics

This past December Jim Weatherall and I wrote ” A Geometric Theory of Everything ” for Scientific American , describing progress on unified geometric theories of gravitation and the Standard Model of particle physics. My personal contribution to this progress, a developing model called E8 Theory, was introduced three years ago in a paper titled ” An Exceptionally Simple Theory of Everything .” Almost immediately after this paper appeared, physicists and the interested public began a lengthy process of considering and discussing this new theory’s merits and faults. Not surprisingly, the initial response was largely critical, with most commenters encountering some unfamiliar mathematical structures in the paper and responding with appropriate skepticism

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Garrett Lisi responds to criticism of his proposed unified theory of physics