  In this Comment it is shown that the principle of relativity is naturally
satisfied and there is no paradox if an independent physical reality is
attributed to the four-dimensional (4D) geometric quantities (GQs) and not, as
usual, to the 3D quantities. Hence, there is no need either for the change of
the expression for the Lorentz force, but as a 4D GQ, or for the introduction
of some "hidden" 3D quantities.
