Computable Wavefunction Realism (CWFR) is an ontological framework for quantum theory grounded in the semantic requirements of explanatory realism. Standard continuum ontology violates two stability conditions: domain instability, in which well-posed dynamics can map admissible states to states with non-denoting magnitudes; and range instability, in which predicates defined on topologically thin sets cannot ground stable physical distinctions. CWFR enforces the minimal corrections via four structural postulates: Lorentz-invariant spectral band-limitation; restriction to computable ontic states; admissible successor dynamics closed on the ontic domain; and predicate admissibility requiring open truth sets. The continuum Hilbert-space formalism is retained as semantic scaffolding rather than ontological furniture. Classical worlds emerge from refinement geometry as maximal diachronic threads through stability-predicate certifications, dissolving the preferred basis problem by identifying classical alternatives as history-dependent objects rather than components of an instantaneous state decomposition. Branching irreversibility follows as a logical consequence of witness-based certification, not a dynamical postulate. Probability operates on finite Boolean event algebras at every refinement stage, rendering standard frameworks for recovering the Born rule applicable without measure-theoretic idealization. This primer is self-contained and accessible to graduate students in physics, mathematics, and the philosophy of physics.
Lance R. Williams (Thu,) studied this question.