  In this paper a discussion is made of the article by the HERMES
Collaboration, Phys.Lett. B666,446, where several important results concerning
strange quark properties in the nucleon were presented. By analysing the sum of
K+- multiplicities it was found that the strange sea distribution is very
different from the non-strange one as a function of the Bjorken x scaling
variable. In addition, the magnitude of these two distributions at low x is
similar, contrary to the behaviour in most of the available parton distribution
function sets. It is shown that the obtained distribution of the unpolarised
strange quark influences our understanding of the "strange quark polarisation
puzzle". It is argued that the sole analysis of the sum of K+- multiplicities,
as done in the HERMES paper, might not be sufficient to draw solid conclusions
about the strange sector. A simultaneous analysis of the difference of K+-
multiplicities should be done in general. To show that this is not simply an
academic case, the author presents an analysis based on the HERMES preliminary
data, where the sum and the difference of the K+- multiplicities are
considered.
