The present communication addresses (by way of a response to Andrei Khrennikov's recent argument), the epistemology of quantum mechanics and Bohr's interpretation of quantum mechanics as complementarity.
We start with discussion on Bohr’s response to the EPR argument andexplain how Bohr was able to sail between Scylla (incompleteness) andCharybdis (nonlocality) towards the consistent interpretation of quantumtheory. We call the latter the Bohr interpretation and distinguish it fromthe commonly used orthodox Copenhagen interpretation. We point to connectionbetween the complementarity principle and the information interpretationof QM and briefly discuss its versions, starting withSchrödinger and continuing to the information quantization interpretation(Zeilinger, Brukner), QBism (Fuchs et al.), reality without realism (RWR,Plotnitsky), the Växjö interpretation (Khrennikov), and derivations of thequantum formalism from the information axioms (e.g., D’Ariano et al.). Oneof the main distinguishing features of the information interpretation is the possibility of structuring thequantum foundations without nonlocality and spooky actionat a distance.
We have referred to general organising principles of quantum mechanics (QM) in the previous chapter, which can be extended (as principles) to several other domains. Among such principles, contextuality-complementarity is perhaps most important in its applicability to different domains of reality. There is a consensus now ( Khrennikov, 2022 ) that these principles emerged through the original works of N. Bohr. Khrennikov (2025) has produced a seminal work in which contextuality becomes the basis of reformulation of QM, and even non-locality, which is argued to be a central feature in the orthodox QM interpretation (rather than the Copenhagen(ish) approaches), can also be reformulated in terms of local contextuality. We will hold a different approach to non-locality later in the chapter, which builds upon our earlier works ( Nadeau and Kafatos, 2001 ). We also mention here that some authors ( Plotnitsky, 2022 ) have attempted to formulate a ‘reality without realism’ view based on Bohr’s original insights. In this chapter, we provide a more detailed view of Copenhagen(ish) approaches to contextuality-complementarity. Since we think that a quantum-like framework (QLF) is also related to such approaches, contextuality-complementarity in QLF can also be formulated in the same line.