  We analyze $pp$ total cross section data from accelerator to cosmic-ray
energies and show that the experimental information presently available
indicate two different scenarios at the highest energies. One of them
accommodates the predictions of the majority of models and the other one shows
agreement with a multiple diffraction model recently developed and improved. We
argue that these results may bring a kind of warning against some possible
precipitated attempts to constraint cosmic-ray estimations from analyzes of
accelerator data.
