ABSTRACT
This chapter is devoted to quantum Bayesianism (QBism), the subjective probability interpretation of QM. Creation of such an interpretation is an important step towards unification of applications of the mathematical formalism of QM to physical and to cognitive and sociopolitical systems. QBism can serve to couple the general theory of decision making based on subjective probability with quantum formalism. On the other hand, our quantum-like modeling of sociopolitical processes does not depend on interpretations of QM. Therefore, the reader need not read this chapter, which has a merely foundational value.
