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Mitchell_Porter comments on How about testing our ideas? - Less Wrong
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Now you're being paranoid. This isn't a bluff, these aren't just words. Compactification on a Calabi-Yau is one of the basic ideas for how to get realistic physics out of string theory, and "crystal melting" is a model of its microscopic quantum geometry.
Yes, and there are so many Calabi-Yau manifolds that just knowing that the world is a ten-dimensional spacetime with six dimensions rolled up into some Calabi-Yau manifold yields hardly any falsifiable prediction at all.