I read somewhere that one power of string theory is that there is no adjustable dimensionless parameter in the theory. Why is this considered a strong point in favour of string theory?(adsbygoogle = window.adsbygoogle || []).push({});

Second, how does the theory help in solving cosmological constant problem? Again there is no adjustable dimensionless parameter which can be put equal to zero. (The article was written long ago, so the author thinks about putting CC=0 but now we know it has a very small positive value.)

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# One doubt about string theory.

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