J.E. Hirsch notes in the recent paper arXiv: 0908.409 that the azimuthal quantum force, introduced ten years ago, would violate the principle of angular momentum conservation. It is specified in the present work that the essence and the method of logical deduction of the quantum force do not overstep the limits of the universally recognised quantum formalism. The puzzle revealed by J.E. Hirsch concerns rather of quantum mechanics in whole than a certain theory or work. The essence of this and other puzzles generated with quantum mechanics is considered shortly.Comment: 11 pages, 2 figure
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