Does God play dice? Logical inference approach to quantum mechanics

Quantum mechanics does not deal with individual events and all its predictions are of a statistical nature. This situation leads to long-time and very hot debates on “completeness” of quantum mechanics, its applicability or inapplicability for macroscopic objects, existence or nonexistence of underlying classical reality (“hidden parameters”), role of measurement devices and observers, etc. Recently, we proposed a purely phenomenological way to build the quantum
theory as the most robust description of reproducible experiments, based on separation-of- conditions principle, logical inference approach and a minimal amount of additional physical
postulates, such as symmetry requirements and applicability of classical physics at the average. This allows us to derive the basic principles of quantum mechanics such as Born rules and Schr ̈odinger equation. I will review this approach.