Let me figure out what's being asked. This is a long-running "Mind" exercise on whether US universities grow or shrink due to AI over 20 years, regionally dependent. The current facet is: **Regional variation (SEC growth vs. northeast/rust belt decline)**.

The instruction at the bottom: Write ONE Markdown note with a single dated claim. # title = claim in one line, 1-3 short paragraphs, end with "What would change this: …", name sources for load-bearing numbers or start sentences with "Unverified:", don't mention tools/sessions/note-writing, don't invent evidence.

The session substance for this facet:

- By early 2040s, US higher ed splits into two geographic regimes.
- SEC/Sun Belt states (TX, FL, GA, TN, AL, Carolinas) grow on all axes: public flagships add est. 20–35% enrollment 2025–2045 on domestic migration, employer relocation, state investment in AI/compute infrastructure (data centers, corporate AI campuses) pulling faculty, federal R&D dollars, industry partnerships south.
- Northeast/Rust Belt shrink on three axes at once: 25–35% fall in college-age population, outmigration of AI-linked employer and tax base, consolidation — small privates and regional publics in PA, OH, NY, MI, New England close/merge/convert at 3–5x national per-capita rate, totaling roughly one in four four-year institutions in that belt by 2045.
- Crucially: AI is an accelerant of the existing migration pattern, not an independent cause — compute-hungry industry follows cheap land, power, low taxes to the South; university prestige follows industry funding.
- Endgame: regional brand monopoly — Southern flagships become default national universities; Northeast retains only its elite tier; displaced Midwestern/Northeast students migrate south (compounding bifurcation) or exit degree-seeking entirely.

Now, what's already covered by prior filed notes so I don't repeat?

Prior notes (per the summaries in the conversation):

1. Signaling: degrees lose signaling value asymmetrically, positional luxury marker by 2035.
2. Cost structure: per-seat vs per-outcome pricing moat; WGU precedent.
3. Cost structure: capped savings at contingent labor layer; staff-before-faculty; balance-sheet dependence over region — "regional patterns are mostly proxies for endowment wealth, tax base, cost of attendance."
4. Research function consolidation: two-tier system, research concentrates in <50 hub campuses, median university exits research, "geography follows funding: research mass migrates toward state capitals that invest and coastal industry adjacencies — the SEC's rise is state-capital-driven, not conference-driven."
5. Full consolidation: demography (births 4.32M → 3.59M, WICHE northeast/midwest lose 10–20% college-age; TX/FL/TN/GA/Carolinas grow), program mix × region (SEC/Sunbelt publics +10–25% seats through ~2040 as legislatures fund; northeast small privates −30–50% by 2040; "program mix picks the winners, regional demography picks which losers can still switch"; three stacked currents: demographic cliff, migration to Sun Belt, AI disruption on white-collar task clusters in NE/Rust Belt metros), flagships everywhere partially insulated.
6. Research facet draft: geography follows research dollars, SEC growth is state-policy-driven not research-endogenous.
7. Enrollment demand: credential market split, regional compounding.

So the regional facet is actually partially covered by the consolidation note and the research note. But the current session adds specific NEW increments for the regional facet:

1. The three-axis shrink mechanism for NE/Rust Belt: demographic decline + AI-linked employer/tax base outmigration + consolidation — all three simultaneously. Prior notes had demography and AI disruption as separate currents; the claim that AI-linked EMPLOYER relocation accelerates the tax base erosion is a sharpening.

2. The "AI as accelerant of existing migration, not independent cause" framing — compute infrastructure (data centers, corporate AI campuses) follows cheap land/power/taxes southward, and university prestige follows industry funding. This is a distinct causal mechanism: AI industry geography drives university geography indirectly through the employer/funding channel.

3. The specific numbers: 20–35% SEC flagship enrollment growth 2025–2045; 25–35% college-age population fall in NE/Rust Belt (note: prior notes said 10–20% from WICHE — the new session says 25–35%; there's a tension. WICHE actual: 2025 projections show 2023–2029 declines of ~10-13% in some states; by 2040s, cumulative from 2007 birth peak could be larger. Hmm. The prior consolidation note said "Northeast/Midwest/Plains