Talk:AdS/CFT correspondence

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It's not a "conceptual breakthrough" if it's unproven. Making the conjecture showed fine insight, and it is clear that valuable results will flow from verifying its status. If it's true then the QCD particle spectrum can be analysed using perturbation theory; if it's false then the explanation, juxtaposed with the fact that it often works, will tell us something interesting. But to build on conjectures is risky, and effort is better spent on checking whether it's true. - AG, Stockport, UK.