vp_frontal — the second brain simulation

vp_frontal is the second long-term simulation of the brain project and the companion of the Felt Cognition paper. Simulation 1 — the frozen 12-node ephaptic mind engine — left the cortex as a single undifferentiated node and omitted the second physical coupling channel. Simulation 2 is an additive program that fills those gaps without changing the frozen kernel: every addition sits behind a node of the byte-frozen engine, so the M9 anchor R = 0.38961455156044245 keeps reproducing bit-for-bit. The chain has five gaps; four are fillable and each survived a stress test designed to break it, and the fifth — felt quality — is kept as an explicit open blank.

Status: Sim 2 COMPLETE — the project is CLOSED. The integration pass (Chunk E) re-derived every committed digest from the artifacts on disk: all seven build and stress-test artifacts reproduce bit-for-bit (broke_on = []), the frozen engine is byte-unchanged, the firewall held on every gap (consciousness_claim = 0, hard_problem_open = 1), and the new tuned constants summed over the whole chain is 0 → sim2_complete = True, project_closes = True.

What the second simulation adds

Simulation 1 is the heavy, successful run: a physics-grounded engine that emerges brain organs from measured 4D-DNA master genes, builds θ/γ brainwaves, memory, inter-organ coordination, the embodied loop, and a 28-module clinical atlas — under strict no-tuning discipline, with its honest negatives preserved and the consciousness firewall held. It is frozen and read-only.

Simulation 2 does three additive things on top of it. It gives the cortex the internal microstructure Sim 1 left as one node (Hard Limit 1). It adds the second physical coupling channel — the axonal connectome — that Sim 1, being ephaptic/proximity-only, omitted. And it operationalizes the cognition / consciousness-access / body framework as a faithful, non-circular set of probes. The precedent that makes this possible without breaking the kernel is the hippocampus: a 120-cell internal model already sits behind a single node of the frozen 12-organ engine without changing it.

The five gaps (the v2 atlas)

The mechanism chain — gene → cell → rhythm → coordination → memory → stream → selection → body, looping back — is complete at the mechanism level. Five gaps remain. Each fillable gap below entered a hypothesis and was then stress-tested to destruction; the grade is the one the module itself emitted. Each gap has its own page with the full build, the stress test, the data tables, and the preserved honest residuals.

The discipline that holds it together

The core long-term rule is the Stress Principle: every hypothesis is stress-tested to destruction, and if it collapses, the collapse is recorded and accepted and the affected line restarts with the collapse built in. Refinement means surviving the stress, never avoiding it — the same way Sim 1 preserved its honest negatives rather than tuning them away. The methodology page sets out the six governing principles inherited verbatim from Sim 1, the additive discipline, and the correction that opened Sim 2.

How the project closed

An integration pass has exactly one thing that can break: a recorded survivor that no longer reproduces. So the closing stress test was an end-to-end digest audit — recompute every committed digest from the artifacts and require that the recomputed value equals the stored value equals the independently committed expected-SHA, for all seven artifacts, with the engine byte-unchanged and the firewall held. It survived. The integration and closure page carries the audit table, the end condition, and the v2 atlas figure; the reproduction and provenance page carries the engine, the modules, the digests, and the citations.

Firewall (Axis-A). Every quantity on this page is a structural quantity of an in-silico model — a sign, a margin, an ordering — and is not a felt state, an experienced quality, or a level of consciousness (consciousness_claim = 0; the hard problem stays open, hard_problem_open = 1). These are model results, not validated neuroscience and not clinical guidance. efficacy = 0; not medical advice.

Scope — what the two simulations cover, and where the boundary is

At the organ level the brain is covered by a saturated 12-region atlas — exactly the major regions that possess an unambiguous single canonical developmental master gene: neocortex, hippocampus, thalamus, striatum, cerebellum, hypothalamus, midbrain, brainstem, pallidum, the forebrain GABAergic interneurons, the basal-forebrain cholinergic system, and the olfactory bulb. Three regions are excluded for a principled biological reason — no single non-redundant master — and kept open rather than forced: the amygdala, the septum, and the preoptic area. The atlas grows only as measured, unambiguous masters become available; the boundary is set by the biology, not by a target region count.

At the function level, thought is decomposed into fourteen faculties. Ten are built and bit-reproducible — perception, attention, the serial stream (working memory), memory, learning, the affect mechanism, arousal/sleep, dreaming, large-scale binding, and pathology — and four are honestly owed with their external inputs named: language, volition, social cognition, and metacognition. The clinical atlas spans roughly nine disorders (autism, ADHD, schizophrenia, epilepsy, depression, bipolar disorder, addiction, OCD, and Alzheimer's), with region-specific applications for focal epilepsy, stroke and diaschisis, and targeted neuromodulation.

What is not in scope: subnuclei granularity (a different atlas), and a complete anatomical or physiological map of every structure. This is a cognition / affect / consciousness dynamics model — fine motor microcircuitry, glia and vasculature, and the peripheral and autonomic systems beyond what the hypothalamus and brainstem carry are outside its stated frame. Within that frame it covers the large majority of the brain's major regions and cognitive faculties; outside it, the boundaries are stated, not hidden.

Contents

• F1The two-simulation program, the additive discipline, and the Stress PrincipleTwo simulations and one end condition; the frozen kernel and why additions do not break it (the hippocampus precedent); the six governing principles inherited verbatim; the Stress Principle; and the under-emergence correction that opened Sim 2.
• F2Session 1 — the foundational build the gaps stand onThe five build modules Sim 2's gaps stand on: cortical emergence (working memory ≈ 7.2 items from the gene), the WM buffer that flips F1's false negative, the axonal channel with a leucotomy that spares perception, the EM-wave physics (radiates at c, couples as a sub-wavelength near-field), and the cognition/body probes (access dissociates from arousal; the stream runs off the body). Then the full 21-module chain, whose open marker became Gap 1.
• F3Gap 1 — EM-field causal efficacy, and the stress test it survivedThe field's causal role was predicted, not shown. The fill is a causal window: off → access floor, at measured strength → access open, over-driven → access collapses. ST-1 swept 36 cells (seed × duration × node); all three signed features sign-stable. The peak sits ~3× above the measured coupling — location, not shape, stays open.
• F4Gap 2 — cortical microstructure as a hub topologyThe hippocampus precedent applied to cortex: a frozen autoassociator re-organized into 7 long-range hubs. Cutting the hub edges collapses distant binding while a mass-matched random-local cut spares it; the effect vanishes all-to-all (topological) and is long-range-specific. ST-2 sign-stable across 9 cells; the micro-model is sufficient and the kernel fork is not triggered.
• F5Gap 3 — the axonal connectome and the O×W double dissociationThe second physical coupling channel, with grounded relative strengths. Routing (W) is separable from cell-count capacity (O): autism reads as a W-fault (cut hub long-range edges → sociality-selective), intellectual disability as an O-fault (fewer cells, tracts intact → capacity-selective). ST-3 confirms a sign-stable crossover across 9 cells — two separable axes, held at arm's length from clinical use.
• F6Gap 4 — the access window and the clinical conscious/unconscious splitDriving the frozen kernel through the emerged sleep architecture, a faithful perturbational PCI reproduces the clinical conscious/unconscious split with no new constant — wake ≈ REM (0.464) ≫ NREM (0.036), sign-stable across 9 cells, non-circular (no kick → PCI = 0). The single scalar does not resolve the fine unconscious ordering — recorded as an honest negative [O].
• F7Gap 5 — felt quality, the hard problem, and the firewall blankThe one gap that is not simulation-fillable. Function is modeled; experience is not. The firewall is kept as an explicit blank, and the chain closes with the blank rather than by erasing it. What would, and would not, move this line.
• F8Integration, the v2 atlas, and the project's closureThe Chunk-E integration pass that closes Sim 2: it re-derives every committed digest from the artifacts on disk (reproduction performed, not asserted), aggregates the per-gap ledger, checks the end condition, and emits the v2 atlas. All seven artifacts reproduce bit-for-bit; the project closes.
• F9Reproduction and provenanceThe audit trail: the frozen engine and its SHA, every v2 module and its digest, the M9 anchor, the gene data, the cited connectome and the cited PCI/sleep mechanism, and the tissue EM parameters. Every module prints its grades and new_tuned_constants = 0.