  There are three upper limits (2, 2.sqrt{2}, 2.sqrt{3}) of the Bell operator
corresponding to different physical concepts: classical, hidden-variable and
quantum-mechanical. Only the classical concept corresponding to the lowest
limit has been excluded by experimental data, while the other two should be
regarded as acceptable for the interpretation of EPR experiments and all
microscopic processes. A corresponding hidden-variable or semiclassical model
(based on the extended Hilbert space) will be proposed and shortly described.
