Description The SIP-PHY Forks Register is a living document recording identified-but-unresolved foundational questions in the SymbioMind SIP-PHY corpus. Each registered fork is a well-formed open question with named branches, traced consequences along each branch, a robustness assessment indicating which existing papers are structured to remain valid across branches, and criteria for what would resolve the fork. Naming forks explicitly turns hidden tensions into transparent research infrastructure. The practice is consistent with the GTRS principle that mature systems hold open tensions productively rather than collapsing prematurely to a single state. Authors of SIP-PHY papers reference forks by ID and indicate whether their argument is robust across branches or commits to a specific branch. Version 1 registers four foundational forks: FORK-01 (the ontological status of time within GTRS — emergent from CDR, coextensive with CDR, or fundamental substrate); FORK-02 (the dimensional realisation of the Klein-surface-like rulebook in physical or state-space contexts); FORK-03 (the status of the observer — internal, external, or co-constitutive); and FORK-04 (whether coherence is a regulatory phase co-equal with decoherence and recoherence, or an observer-operator that collapses a D/R superposition).
Smith et al. (Fri,) studied this question.