"Question 8. Is There a Measurable, Qualitatively Distinctive Prediction of String Theory? String theories can, in principle, make many "s" (such as the calculation of the mass ratios of s and s, Higgs masses and couplings, s, etc.). They can also make many new predictions (such as the masses of the supersymmetric partners of the observed particles, new gauge interactions, etc.). These would be sufficient to establish the validity of the theory, however in each case one can imagine (although with some difficulty) conventinal field theories coming up with similar pre or post dictions. It would be nice to predict a phenomenon, which would be accessible at observable energies and is uniquely characteristic of string theory."