This paper gathers arguments and reasons why muons surviving the Gran Sasso
mountain cannot mimic the Dark Matter annual modulation signature exploited by
the DAMA/NaI and DAMA/LIBRA experiments. A number of these items have already
been presented in individual papers. Further arguments have been addressed here
in order to present a comprehensive collection and to enable a wider community
to correctly approach this point.Comment: 26 pages, 9 figures. Few arguments added; version accepted for
publication on Eur. Phys. J.