SCAR- A Speculative Covariant Causal Memory Hypothesis for Discrete Quantum Spacetime

This paper presents SCAR, short for Space-Time Causal Associative Record, as a speculative hypothesis for a discrete causal-information substrate of spacetime. The central proposal is that a qualifying entanglement-producing direct causal interaction writes a persistent relational record, called a SCAR, into an underlying causal structure. We define a finite covariant history space whose physical elements are unlabeled isomorphism classes of causal orders decorated by local quantum-process classes and SCAR records. Each SCAR contains a relational record label, a local-unitary-invariant persistence sector, and a bounded magnitude determined by entanglement. A label-invariant statistical history ensemble is proposed, with a minimal action that couples causal-link structure to the concentration of SCAR magnitude. The framework is explicitly presented as a finite toy model and hypothesis rather than an established theory of physics. It does not derive the Born rule, Lorentz symmetry, an effective spacetime metric, general relativity, quantum field theory, or an empirical prediction for the observed universe. Its immediate purpose is to formulate a falsifiable research program in which covariance, quantum consistency, continuum emergence, and phenomenology can be tested progressively.