GR-Razor Stress Tests-Pillar 6: Cosmological Pangaea: A Finite Structured Initial State as an Alternative to the Singular Big Bang

Cosmological Pangea Pillar 6 is the constructive proposal of the GR-Razor Stress Tests series. Pillars 1 through 4 exhaustedthe principal GR-internal mechanisms proposed to resolve cosmological tensions: relativistic peculiarvelocity corrections, inhomogeneous backreaction, vector and tensor mode contributions, andframe-dragging effects each failed decisively on amplitude or consistency grounds. Pillar 5 auditedΛCDM itself and declared it incomplete: the Hubble tension at 5σ and the cosmological constantproblem at 10122 orders of magnitude are unresolved failures for which the standard model has nointernal mechanism. Pillar 6 does not test a challenger. It proposes one. We propose Cosmological Pangaea, a cosmological framework in which the Universe originated notfrom a mathematical singularity but from a finite, maximally dense, causally connected initial object thatunderwent a fragmentation and expansion event. The framework operates entirely within generalrelativity, introduces no new fields or particles, and satisfies both intake metrics of the series. It resolvesthe horizon problem directly and without inflation, replaces the singularity with a physically realizableinitial state, and makes four classes of testable predictions distinct from ΛCDM: afragmentation-derived primordial power spectrum, a characteristic large-scale structure topology, amodified expansion history that may address the Hubble tension, and a fossil imprint in the cosmic webabove the BAO scale. The central quantitative problem, deriving the fragmentation power spectrum from Jeans instabilityanalysis of the initial object, is identified as the decisive test. Three GR-internal triggering mechanismsare examined: quantum bounce at Planck density, first-order phase transition in the equation of state,and topological expansion from a closed three-sphere geometry. Four guillotine tests are defined inadvance following the methodology of the GR-Razor series. This paper is a conceptual frameworkdocument. The quantitative development of the fragmentation power spectrum and the Hubble tensioncalculation are identified as targets for subsequent work. Final standing: Cosmological Pangaea survives every falsification test across twelve published Pillars. It eliminates the classical Big Bang singularity, replacing infinite-density breakdown with a finite, geometrically describable initial object. It dissolves the horizon problem without inflation, the causal connectivity of the initial state making the problem retroactively unnecessary. It reproduces the CMB spectral index at zero sigma deviation with no parameter adjustment. It reduces the Hubble tension from 5.0σ to 1.39σ from first principles, with full resolution within published LQC quantization uncertainty. It derives the arrow of time as a geometric consequence of symmetry breaking, with exactly zero initial gravitational entropy by Birkhoff's theorem. It connects the Hubble tension and the MOND galactic dynamics anomaly as linked consequences of the same parameter through Verlinde's entropic gravity relation, predicting the observed MOND acceleration scale within 8% without fitting. It does all of this while adhering strictly to general relativity and Occam's razor, introducing no new fields, no new particles, no fine-tuned potentials, and no action modifications. The GR-Razor series conclusively demonstrates a parsimonious, internally consistent alternative framework that resolves multiple independent cosmological tensions from first principles and is ready for full Boltzmann validation. 1. 10.5281/zenodo.18736909 – Independent Cosmological Falsification Series. 2. 10.5281/zenodo.18737186 – Inhomogeneous Backreaction as a GR-Internal Resolution to the JWST Early Galaxy Excess. 3. 10.5281/zenodo.18737308 – Vector and Tensor Mode Contributions in Relativistic Perturbation Theory as a GR-Internal Resolution to the JWST Early Galaxy Excess. 4. 10.5281/zenodo.18744293 – Frame-Dragging and Lense-Thirring Effects in Collapsing Structures as the Final GR-Internal Candidate for the JWST Early Galaxy Excess. 5. 10.5281/zenodo.18744659 – ΛCDM Under the GR-Razor Framework — A Full-Spectrum Stress Test of the Standard Cosmological Model. 6. 10.5281/zenodo.18745418 – Cosmological Pangaea: A Finite Structured Initial State as an Alternative to the Singular Big Bang. 7. 10.5281/zenodo.18748402 – Positioning of Cosmological Pangaea within Non-Singular Cosmologies: A Meta-Analysis and Theoretical Placement. 8. 10.5281/zenodo.18749361 – The Horizon Problem Dissolved: A Finite Initial State Renders CMB Uniformity Inevitable Without Inflation. 9. 10.5281/zenodo.18750240 – Consolidated Status of Cosmological Pangaea: Current Position, Quantitative Outcomes, and Open Questions. 10. 10.5281/zenodo.18750432 – ΛCDM Declared Incomplete, the Horizon Problem Dissolved, and the Hubble Tension Reduced to 1.39σ by a First-Principles Quantum Bounce. 11. 10.5281/zenodo.18751911 – The Arrow of Time: Geometric Origin of the Thermodynamic Arrow of Time: Weyl Curvature Growth During Fragmentation of a Finite Initial-State Universe. 12. 10.5281/zenodo.18755740 – The Navigable Universe Theory: Entropy as the Substrate of Physical Structure, Time's Arrow, and the Cosmic Sailor. 13. 10.5281/zenodo.18778921 – The Goldilocks Band as Cosmological Structure: Entropy Gradient Boundaries, Observer Emergence, and the Navigable Topology of the Cosmic Web. 14. 10.5281/zenodo.18790403 – The Engine and the Map: Scale-Dependent Thermodynamic Emergence and the Crossover Surface of Entropic Gravity in the Navigable Universe. 15. 10.5281/zenodo.18791558 – Cusps Never Formed: The Entropic Engine as the Geometric Resolution of the Core-Cusp, Missing Satellites, and Too-Big-to-Fail Problems Without Dark Matter, Feedback, or New Physics. 16. 10.5281/zenodo.18793031 – Geometric Baryogenesis: The Irreversible Weyl Excitation from Zero Gravitational Entropy as the Origin of Matter-Antimatter Asymmetry. 17. 10.5281/zenodo.18794156 – Surface Death: The Dimensional Collapse of the Entropy Gradient Network. 18. 10.5281/zenodo.18796471 – Distinction as the Irreducible Primitive: Deriving 3+1 Spacetime, Three Fermion Generations, and the Structural–Dynamical Partition from a Single Axiom. 19. 10.5281/zenodo.18805129 – The Geometry of the First Cut: Inevitability, Structural Repetition, and the First General-Relativity-Compliant Multiverse. 20. https://zenodo.org/records/18827471 – The Story of How Cosmological Pangaea Unfolded. 21. https://zenodo.org/records/18828910 – Nick Bostrom's Simulation Theory Put Through the GR-Razor Stress Tests. 22. https://zenodo.org/records/18829682 – String Theory Landscape + Eternal Inflation Multiverse Put Through the GR-Razor Stress Tests. 23. https://zenodo.org/records/18829899 – Supersymmetry (SUSY) Put Through the GR-Razor Stress Tests. 24. https://zenodo.org/records/18830031 – Grand Unified Theories (GUTs) Put Through the GR-Razor Stress Tests. 25. https://zenodo.org/records/18836774 – Loop Quantum Gravity (LQG) and Spin Foam Approaches Put Through the GR-Razor Stress Tests. 26. https://zenodo.org/records/18837671 – Many-Worlds Interpretation (MWI) Extensions and Quantum Cosmology Put Through the GR-Razor Stress Tests. 27. https://zenodo.org/records/18839355 – Causal Dynamical Triangulations (CDT) Put Through the GR-Razor Stress Tests. 28. https://zenodo.org/records/18840383 – The Architecture of Necessity: A Manifesto of the GR-Razor and Cosmological Pangaea's Complete Reset for the Field of Cosmology 29. https://zenodo.org/records/18867405 -The Resurrection Ship: A Framework for Civilizational Preservation in the Age of Artificial Intelligence (Philosophical) 30. https://zenodo.org/records/18869920 - The Geometry That Would Not Yield: Einstein-Rosen Bridges as Geometric Necessity Under the Distinction Axiom 31. https://zenodo.org/records/18878368 - Gravity and Electromagnetism as Dual Expressions of Distinction Preservation – A Native Cosmological Pangaea Unification 32. https://zenodo.org/records/18879016 - Non-Singular Black Hole Interiors – Gravitational Collapse Resolved as Geometric Necessity Under the Distinction Axiom 33. https://zenodo.org/records/18880455 -The Articulation of Distinction: Why Mathematics Describes Reality with Unreasonable Effectiveness 34. https://zenodo.org/records/18880897 -Birth of Consciousness and the Phenomenology of Distinction: Subjective Experience as Self-Referential Registration 35. https://zenodo.org/records/18884555 -CMB Large-Scale Anomalies as Geometric Inevitabilities: Fragmentation Signatures of the Cosmological Pangaea Initial State 36. https://zenodo.org/records/18891292 -The Black Hole Information Paradox and Emergent Holography under the Distinction Axiom 37. https://zenodo.org/records/18891625 -Primordial Nucleosynthesis in a Finite Initial State: Resolving the Cosmological Lithium Problem via Quantum Bounce and Entropic Dynamics 38. https://zenodo.org/records/18891904 -Quantum Measurement and the Emergence of Observers: Born Rule and Decoherence from Distinction Registration and Entropy Gradients in Cosmological Pangaea 39. https://zenodo.org/records/18892666 -Large-Scale Structure Power Spectrum and Baryon Acoustic Oscillations in the Navigable Universe 40. https://zenodo.org/records/18893145 -An Exhaustive Synthesis of Falsifiable Signatures in Cosmological Pangaea: Predictive Tests for Next-Generation Observations