Can anybody elaborate on the implications of the BICEP2 result for string theory?
The discussion here What experiment would disprove string theory? suggests that refuting string theory is rather difficult. It did not mention that planned/ongoing experiments in the near future could exclude many string models by measuring the polarization of the CMB.
I now read that the BICEP2 result might rule out lots of string theory models. Is that true? If so, why? Is this result in the so-called "swampland"? How big a blow is this for string theory?