  This paper addresses the central question of what a coherent concept of
probability might look like that would do justice to both classical probability
theory, axiomatized by Kolmogorov, and quantum theory. At a time when quanta
are receiving increased and expanded attention -- think, for example, of the
advances in quantum computers or the promises associated with this new
technology (National Academies of Sciences: Engineering, and Medicine, 2019) --
an adequate interpretation of probability, which is no less important, should
be given due attention, particularly with regard to quantum theory.
