We discuss briefly the elementary part of the three-valued logic of D.A. Bochvar (sentential calculus), and use the symbols of this calculus to formulate sufficient conditions for the meaninglessness of equalities and inequalities of scalar and vector phsyical quantities. We also formulate the sufficient conditions for the equality of dimensions of these quantities. It is asserted that analogous formulas are valid also for matrices all of whose elements have identical dimensions and are measured in identical units.
Department of General Physics for the Physics Faculty, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119991, Russia
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