  The mathematical model of orthodox quantum mechanics has been critically
examined and some deficiencies have been summarized. The model based on the
extended Hilbert space and free of these shortages has been proposed;
parameters being until now denoted as "hidden" have been involved. Some earlier
arguments against a hidden-variable theory have been shown to be false, too. In
the known Einstein-Bohr controversy Einstein has been shown to be true. The
extended model seems to be strongly supported also by the polarization
experiments performed by us ten years ago.
