The Continuous Formalism of Discrete Physics: Why Unitary Time Evolution Is an Approximation, Not a Foundation

This paper argues that unitary time evolution — the continuous, deterministic, reversible evolution of the wave function via the Schrodinger equation — is not a fundamental feature of quantum reality but a continuous approximation of an underlying discrete process, structurally parallel to how Newtonian mechanics approximates discrete molecular dynamics. The measurement problem is identified not as a feature of quantum reality but as an artifact of imposing continuous formalism on discrete physics. A continuous equation cannot produce discrete events; this is mathematical, not mysterious. Caldirola's finite-difference quantum mechanics is cited as the formal precedent. Companion paper to DOI: 10.5281/zenodo.19540088.