Abstract

The concept of wave function collapse is commonly presented as a physical process explaining the emergence of definite measurement outcomes in quantum mechanics. This paper conducts a conceptual audit of the underlying assumptions and demonstrates that collapse is neither empirically forced nor necessary for the formal consistency of quantum theory. The analysis distinguishes between empirical facts, formal apparatus, and ontological claims. It shows that collapse is an interpretive construct—a bridge between unitary formalism and classical experience—rather than a description of physical dynamics. The state update rule in quantum mechanics is a mathematical operation in the calculus of probabilities, not a specification of physical mechanism. This paper does not propose an alternative interpretation or deny the mathematical consistency of quantum mechanics. Its aim is to delineate what follows from the formalism and data from what constitutes interpretive superstructure.