Gross estate (modeled)
—
business · property · brokerage · insurance
Combined runway remaining
—
2 × $15.0M less lifetime gifts · §2010(c)(3)
Modeled exposure @ horizon
—
modeledattorney + CPA
Evidence coverage
—
computed from vault attachments — never typed
The exemption runway
the desk's defining tension — a $38M estate against a $30M combined runwayas of —modeled
runway used (709 history)runway remainingprojected estate above runway — modeled exposure zone
×40%Modeled transfer-tax exposure at horizon — §2001(c) top rate—modeled — gated for attorney + CPA review
Exceptions on the deck
3 open
$2.0M life-insurance face personally owned — §2042 incidents of ownership place it in the gross estate
One-sided ledger entry — ILIT brokerage transfer missing the trust-side record
Qualified appraisal for Okafor Manufacturing — engaged, not yet delivered; E2/E3 figures stay modeled until it lands
Routed determinations — open
professionals decide
Portability ↔ credit-shelter at first deathboth branches → attorney
Gift-now (§1015) ↔ hold-for-step-up (§1014)flagship pair → attorney + CPA
Community ↔ separate characterization (per asset)attorney
Retain ↔ distribute trust income (§§651/661)CPA
Valuation discounts on entity interestsappraiser + attorney
This workstation organizes an estate's structure, paper, and evidence. It is not a law or accounting firm and does not provide legal, tax, or valuation advice; every instrument, valuation, election, and characterization — portability vs. credit-shelter, gift vs. hold, community vs. separate, discounts, trust distributions — is drafted, valued, ratified, and filed by the licensed estate attorney, qualified appraiser, and CPA it routes to. Demo data for Evelyn & Raymond Okafor · all figures illustrative and modeled.
Runway vs. projected estate as of —modeled
Projected estate at horizon — against combined remaining runway —
—
modeled exposure × 40%
Assumptions — labeled, adjustable
6.0%
assumption, not a projection promise
10y
6
$19,000/donee — §2503(b) · present interest
consent signalled on Form 709
$60K
unlimited and outside the exclusion — the zero-runway lever
529 front-load chip: §529(c)(2)(B) lets a donor elect five years of exclusions in year one — 5 × $19,000 per donee — on Form 709. Rendered here as program capacity, not a move.
Per-spouse runway
$15.0M each — §2010(c)(3) · OBBBA §70106 · Rev. Proc. 2025-32
Evelyn — lifetime taxable gifts (709 history)$1.20M used · — remaining
Raymond — lifetime taxable gifts (709 history)$0.80M used · — remaining
Annual-exclusion program removes over horizon (gifts + growth thereafter)—
Projected estate above runway → modeled tax—
First-death design — both branches, no default
routed → estate attorney · CPA files the 706
Portability branch — DSUE to survivor
Simplicity + full second step-up on all assets at survivor's death+
DSUE is frozen — not indexed after the first death−
No GST-exemption carry — §2631 does not port−
Remarriage risk — §2010(c)(4) last-deceased-spouse rule−
Election pathtimely Form 706 · §2010(c)(5)(A) · late relief ≤ 5 yrs — Rev. Proc. 2022-32
route↔no default
Credit-shelter (bypass) branch
Locks growth out of the survivor's estate+
Preserves GST allocation on the sheltered share+
Bypass assets get no second step-up — the §1014 tension, rendered adjacent, always−
Design pathfunding formula + trustee powers — attorney drafts
Show the math & sources
Runway:
Statutes & sources: §2010(c)(3) as amended by OBBBA §70106 (P.L. 119-21), confirmed Rev. Proc. 2025-32 — $15,000,000, indexed from 2027, no scheduled sunset · §2503(b) $19,000 · §2513 split · §2503(e) unlimited direct-pay · §2631 GST matches · portability §2010(c)(5)(A) + Rev. Proc. 2022-32.
Flagged simplifications: single growth rate across asset classes; program gifts assumed present-interest (trust gifts need Crummey powers — see the notice log); no state estate tax modeled (CA has none — other states are per-state config); DSUE modeled qualitatively, not folded into the exposure figure.
remaining(spouse) = CFG.exclusion − lifetimeGifts · combined = Σ spouses. Program: yearly = donees × $19,000 × (split ? 2 : 1) + directPay§2503(e); removed with growth thereafter ≈ yearly × ((1+g)^n − 1) / g. Projection: estate(n) = gross × (1+g)^n − removed. Exposure: max(estate(n) − combinedRemaining, 0) × 40% — §2001(c).Statutes & sources: §2010(c)(3) as amended by OBBBA §70106 (P.L. 119-21), confirmed Rev. Proc. 2025-32 — $15,000,000, indexed from 2027, no scheduled sunset · §2503(b) $19,000 · §2513 split · §2503(e) unlimited direct-pay · §2631 GST matches · portability §2010(c)(5)(A) + Rev. Proc. 2022-32.
Flagged simplifications: single growth rate across asset classes; program gifts assumed present-interest (trust gifts need Crummey powers — see the notice log); no state estate tax modeled (CA has none — other states are per-state config); DSUE modeled qualitatively, not folded into the exposure figure.
Engines propose; professionals ratify.
The runway model is a planning surface. The estate attorney ratifies the first-death design; the CPA files the Form 706 that makes either branch real. Nothing here elects, funds, or files.
This workstation organizes an estate's structure, paper, and evidence. It is not a law or accounting firm and does not provide legal, tax, or valuation advice; every instrument, valuation, election, and characterization is drafted, valued, ratified, and filed by the licensed estate attorney, qualified appraiser, and CPA it routes to. Demo data · all figures illustrative and modeled.
Gift-now (§1015) ↔ hold-for-step-up (§1014) as of —modeledrouted → attorney + CPA
The routed pair this desk exists for — compute both, show the crossover, route. Neither branch is a recommendation.
—
Δ hold − gift (modeled)
The asset — one position, modeled
hard-to-value assets need a qualified appraisal — evidence object
community vs. separate is the attorney's call — the engine renders both regimes, defaults neither as fact
5.0%
10y
60%
the slice of this asset that would land above the remaining runway — E1 informs, professionals confirm
37.1%
default = 20% §1(h) + 3.8% §1411 + 13.3% CA (CG taxed as ordinary) — adjustable
adds to basis on the appreciation share — §1015(d)(6); within 3 yrs of death it grosses back — §2035(b)
Hold — §1014 step-up at death
FMV at death (modeled)—
Heir basis after step both halves — §1014(b)(6)—
Heir gain on sale × rate—
Estate share above runway × 40%—
Hold-branch modeled cost—
Δ modeled—↔routed
Gift — §1015 carryover basis
Donee basis (carryover + §1015(d)(6) add)—
Built-in gain realized on sale × rate—
Asset + growth out of the estate at today's valueremoved
§2035(b) — gift tax grosses back if death < 3 yrsflag
Gift-branch modeled cost—
—
SOL§6501(c)(9) — adequate disclosure on Form 709 starts the 3-year clock on gift valuationmodeled — 709 (2026) pending in vault
Show the math — formulas verbatim from the law file
Gift branch:
Hold branch:
Crossover: the exposed-share at which the branches equalize —
Statutes: §1014(a) · §1014(b)(6) · §1015(a) · §1015(d)(6) · §2035(b) · §2001(c) · §1411 · §6501(c)(9).
Flagged simplifications: sale modeled at the death/gift horizon (FMVsale = FMVdeath) — post-death growth taxed identically on both branches, so it cancels; one blended gain rate (CA taxes capital gain as ordinary income — 13.3% top is an illustrative default); branches compared at face, undiscounted — timing between the estate-tax date and the sale date is an NPV refinement the professionals price; exposed-share is an input, not a computed allocation across the whole balance sheet; loss assets (basis > FMV): out of scope — §1015(a)'s dual-basis rule kills the built-in loss on gift and §1014 steps basis down at death, so neither branch preserves the loss; the engine floors gains at zero and does not model loss harvesting — sell-vs-transfer on a loss asset is routed to the professionals.
Evidence objects: qualified appraisal (hard-to-value) · Form 709 with adequate disclosure (starts the statute) · attorney ratification of any gifting program · community-property characterization memo.
giftBranchCost = (FMVsale − donorBasis − basisAdd) × (ltcg + niit + state) with basisAdd = giftTaxPaid × (FMVgift − donorBasis) / FMVgift — §1015(a) carryover · §1015(d)(6) basis add on the appreciation share · dual basis for loss property (FMV-at-gift measures loss) · §2035(b) 3-year gross-up rendered as an adjacent flag, never folded.Hold branch:
holdBranchCost = estateShareAbove40 × 0.40 + (FMVsale − heirBasis) × (ltcg + niit + state) — §1014(a) step to FMV at death; community property doubles it: both halves step, §1014(b)(6) — the Okafor centerpiece. Separate/half-step regime: heirBasis = (FMVdeath + donorBasis) / 2.Crossover: the exposed-share at which the branches equalize —
exposed* = (giftCost − holdCapCost) / (FMVdeath × 0.40). Below-runway estates tilt hard toward step-up; the engine shows the tilt, the professionals call it.Statutes: §1014(a) · §1014(b)(6) · §1015(a) · §1015(d)(6) · §2035(b) · §2001(c) · §1411 · §6501(c)(9).
Flagged simplifications: sale modeled at the death/gift horizon (FMVsale = FMVdeath) — post-death growth taxed identically on both branches, so it cancels; one blended gain rate (CA taxes capital gain as ordinary income — 13.3% top is an illustrative default); branches compared at face, undiscounted — timing between the estate-tax date and the sale date is an NPV refinement the professionals price; exposed-share is an input, not a computed allocation across the whole balance sheet; loss assets (basis > FMV): out of scope — §1015(a)'s dual-basis rule kills the built-in loss on gift and §1014 steps basis down at death, so neither branch preserves the loss; the engine floors gains at zero and does not model loss harvesting — sell-vs-transfer on a loss asset is routed to the professionals.
Evidence objects: qualified appraisal (hard-to-value) · Form 709 with adequate disclosure (starts the statute) · attorney ratification of any gifting program · community-property characterization memo.
Both branches computed. Neither elected.
A qualified appraisal values the asset; the attorney ratifies any gifting program and the title characterization; the CPA files the 709 whose adequate disclosure starts §6501(c)(9). Until those objects exist, every figure on this panel stays modeled.
This workstation organizes an estate's structure, paper, and evidence. It is not a law or accounting firm and does not provide legal, tax, or valuation advice; every instrument, valuation, election, and characterization is drafted, valued, ratified, and filed by the licensed estate attorney, qualified appraiser, and CPA it routes to. Demo data · all figures illustrative and modeled.
Vehicle comparator as of —modeled rangesattorney-gated
Four routes for the same transfer — growth escaping the estate, each behind its own instrument and its own flag
—
mid-term AFR · §1274(d) — monthly feed, never typed
Shared modeling inputs
7.0%
10y
The four routes — modeled, flagged, routed
AFR —
| Vehicle | Mechanism | Statutes / doctrine | Growth escaping estate (modeled) | × 40% relevance | Standing flag |
|---|---|---|---|---|---|
| Outright gift simplest; consumes runway | asset + all growth out at today's value | §§2501, 2503, 1015 | — | — | loses control · §2035(b) 3-yr gross-up |
| SLAT gift to spouse's trust; indirect access | as outright, with spousal-access design | §2503 · grantor-trust §677 | — | — | reciprocal-trust doctrine — U.S. v. Grace, 395 U.S. 316 · attorney lane |
| IDGT sale-for-note sell to grantor trust at AFR | growth over the AFR note escapes | §7872 · §1274(d) · Rev. Rul. 85-13 | — | — | seed ~10% + note bona fides (Miller factors) dual-sourced per D18 — promoter sells it, skeptic stress-tests it |
| GRAT retained annuity; zeroed-out | growth over the §7520 hurdle passes | §2702 · Walton v. Comm'r, 115 T.C. 589 | — | — | mortality risk — §2036 inclusion if grantor dies in term legislative-risk watch |
Both-sides ledger law applies. Every note, annuity, and funding movement papers into the at AFR, contemporaneously (D16 planks 4–5) — the treasury doctrine and the estate doctrine are the same doctrine here. Valuation discounts on entity interests: routed — appraiser + attorney (§2704 regulatory history noted).
Show the math & the rate feed
Outright / SLAT:
Rate feed: July 2026 — mid-term AFR (annual) —, §7520 — — Rev. Rul. 2026-12; read from CFG, recomputed monthly, never typed into an instrument. Flagged simplifications: IDGT modeled as interest-only balloon vs. growth (no amortization schedule); GRAT modeled single-term against the hurdle, not annuity-by-annuity; ×40% column is transfer-tax relevance of the escaped growth, not a savings claim — it is gated.
escape = T × ((1+g)^n − 1) plus T itself removed against runway. IDGT: escape = T × ((1+g)^n − (1+AFRmid)^n) — growth over the note. GRAT (zeroed-out per Walton): escape ≈ T × ((1+g)^n − (1+§7520)^n).Rate feed: July 2026 — mid-term AFR (annual) —, §7520 — — Rev. Rul. 2026-12; read from CFG, recomputed monthly, never typed into an instrument. Flagged simplifications: IDGT modeled as interest-only balloon vs. growth (no amortization schedule); GRAT modeled single-term against the hurdle, not annuity-by-annuity; ×40% column is transfer-tax relevance of the escaped growth, not a savings claim — it is gated.
This workstation organizes an estate's structure, paper, and evidence. It is not a law or accounting firm and does not provide legal, tax, or valuation advice; the choice and drafting of any vehicle — outright, SLAT, IDGT, GRAT — is the estate attorney's, the valuation the appraiser's, the filings the CPA's. Demo data · all figures illustrative and modeled.
Incidents-of-ownership check as of —modeled
Personally-owned life insurance is in the gross estate — §2042. §101(a) income-tax-free ≠ estate-tax-free: the pair renders together, always.
—
modeled exposure on $2.0M face × 40% if above runway
The §2042 checklist — computed, not asserted
✗
Owner ≠ insured
Today: Raymond owns the policy on his own life — the face lands in his gross estate under §2042(2).
✗
Beneficiary = trust (not the estate)
Estate-as-beneficiary triggers §2042(1); the ILIT designation cures it once executed.
✗
No retained incident — change beneficiary, borrow, surrender, assign
Any one retained incident keeps the face in the estate.
✓
Crummey withdrawal notices — the evidence object
Crummey v. Comm'r, 397 F.2d 82 (9th Cir. 1968): notices make trust premiums present-interest gifts. The log is the object and contemporaneity is provable — exactly the participation-tracker discipline. Current cycle: 2 of 3 sent.
Both paths from here — routed
attorney drafts
ATransfer the existing policy into an ILITfights §2035(a) — 3-year clock runs from transfer
BNew policy applied for and issued inside the trustavoids the 3-year rule entirely
Either way — the pair, always on screen§101(a) income-tax-free ≠ §2042 estate-tax-free
ILIT instrument status: draft in the vault. Until it is executed, funded, and the beneficiary designation lands, this panel's cure paths stay modeled and the $2.0M face stays an exception on the command deck.
Show the law
§2042(1) proceeds receivable by the estate · §2042(2) incidents of ownership · §2035(a) transfers of existing policies within three years of death pulled back · §101(a) income-tax exclusion — a different tax than the estate tax, rendered as a pair, never conflated · Crummey present-interest mechanics feed the §2503(b) exclusion on premium gifts. Exposure figure:
face × 40% applied only to the share above remaining runway — modeled, gated.The attorney drafts the ILIT; the trustee sends the notices.
This check computes status from facts on file. It does not create, assign, or fund a policy or trust.
This workstation organizes an estate's structure, paper, and evidence. It is not a law or accounting firm and does not provide legal, tax, or valuation advice. Demo data · all figures illustrative and modeled.
§6166 installment deferral — business estates as of —modeledeligibility & election → attorney + CPA
Closely-held interest at — of the gross estate against the 35% floor — —
—
face payments over the schedule
Inputs
seeded live from the runway engine's modeled exposure — editing overrides
7.00%
Rev. Rul. 2026-10 (IRB 2026-22): 7% for Jul 1–Sep 30 2026 — quarterly feed, editing overrides; balance interest = 45% of it (§6601(j)); the 2% slice is statutory and exact
2%-portion tax slice
—
§6601(j) · $1.94M — Rev. Proc. 2025-32
Balance-rate slice
—
45% × §6621 (Q3 '26: 7% — Rev. Rul. 2026-10)
Structure
≤ 5 + 10
interest-only yrs, then installments — 14 max
NPV twin — deferral, not free money
5.00%
Present value of the deferred schedule—
vs. lump-sum tax at death (face)—
Modeled PV relief from deferring—
Payment curve — years 1–15
modeled
Aggregation across entities — §6166(c)CPA maps the 20%-voting test
Acceleration on disposition / withdrawal — §6166(g)standing trigger, tracked on the calendar
Graegin-style loan interest — adjacent alternativeattorney + CPA
Show the math
Eligibility (modeled):
Attributable tax:
NPV twin:
businessPct = closelyHeld / grossEstate = $16M / $38M against the 35% floor — §6166(a). Simplification flagged: the statute tests against the adjusted gross estate; the demo uses gross.Attributable tax:
attrib = estateTax × businessPct. 2% slice: twoPct = min(attrib, $1,940,000 × 40%) — §6601(j) mechanics stated exactly; the $1.94M is the 2026 amount, Rev. Proc. 2025-32. Schedule: years 1–5 interest only (2% × twoPct + 45%·r × balance), years 6–15 ten equal principal installments plus declining interest — §6166(a)(1),(3).NPV twin:
PV = Σ payment_t × (1+dr)^−t vs. face lump sum — the D18 honesty plank: deferral is a timing lever and renders present value beside face. Interest paid is a real cost inside the curve.
The engine models the payment curve; eligibility and election are the professionals'.
§6166 relief rides on the executor's timely election and the closely-held tests — attorney and CPA territory, every time.
This workstation organizes an estate's structure, paper, and evidence. It is not a law or accounting firm and does not provide legal, tax, or valuation advice. Demo data · all figures illustrative and modeled.
Non-grantor compression as of —modeledretain ↔ distribute → CPA
A non-grantor trust hits the 37% bracket and the §1411 NIIT at $16,000 of retained income — Rev. Proc. 2025-32
—
Δ retain − distribute (modeled)
Inputs
$60K
24%
beneficiary-level NIIT depends on their own facts — routed, not folded
Retain in trust
Tax at trust brackets (10/24/35/37 — §1(j)(2)(E))—
NIIT 3.8% over $16,000 — §1411(a)(2)—
Retained — modeled tax—
Δ modeled—↔routed
Distribute — DNI via K-1
Distribution deduction pushes income out — §§651/661shift
Beneficiary tax at their bracket—
Distributed — modeled tax—
§645 election (estate/QRT combination) · §644 fiscal-year limitsCPA lane
Show the math
Trust brackets 2026 (Rev. Proc. 2025-32): 10% ≤ $3,300 · 24% to $11,700 · 35% to $16,000 · 37% above —
trustTax = bracketSum(income); NIIT = max(income − 16,000, 0) × 3.8%. Distribute: benTax = income × benRate — trust-level distribution deduction under §§651/661 carries DNI out on the K-1. Flags: non-distributable capital gains ordinarily stay trust-level absent instrument/state-law inclusion in DNI — routed; beneficiary NIIT excluded (their thresholds, their facts).Distribution decisions are the trustee's, on the CPA's numbers.
The engine renders both branches and the delta. Fiduciary duty, the instrument's standards, and beneficiary facts decide — none of which live in a slider.
This workstation organizes an estate's structure, paper, and evidence. It is not a law or accounting firm and does not provide legal, tax, or valuation advice. Demo data · all figures illustrative and modeled.
Structure map
apex trust → titled holdings · funding & retitling statusUnfunded trusts are the classic failure
Title & funding register
Okafor Family Trust (revocable · CP)apex · 2019
Okafor Manufacturing Co — S-corp$16M · trust-titled
3 CA parcels — per-property LLCs$12M · deeds ✓
Brokerage$8M · retitled ✓
Life policy — $2.0M facepersonally owned — exception
Okafor ILITdraft — unfunded
Descendants' trust (GST)proposed
CA real property carries a Prop 19 adjacency: transfers can trigger county reassessment — a property-tax regime, not a transfer tax, and an attorney / property-tax-counsel lane. routed
This workstation organizes an estate's structure, paper, and evidence. It is not a law or accounting firm and does not provide legal, tax, or valuation advice. Demo data · all figures illustrative and modeled.
Papered movements
3
executed & final
Draft instruments
2
surface until executed
Exceptions
1
one-sided — not an entry
Estate-paper ledger
gifts · notes · funding — papered vs. draftas of —
Plank-4 ledger law. Every movement resolves to the closed instrument vocabulary — promissory_note management_fee_agreement cost_allocation capital_contribution distribution intercompany_rent royalty guarantee other — and both sides validate (donor ledger ↔ trust ledger); a one-sided entry is an exception, not an entry. Booked totals never move on assertion — a discrepancy raises a flag and waits for source documents (executed instrument, deed, statement). AFR on the IDGT note is computed from the monthly table (Rev. Rul. series), never typed. Lifecycle: proposed → cpa_reviewed → attorney_reviewed → final (plank 5). Contemporaneity: paper generates the moment the movement is identified — never a retroactive batch.
| Date | From → To | Purpose | Instrument | Amount | Both sides | Lifecycle |
|---|
This workstation organizes an estate's structure, paper, and evidence. It is not a law or accounting firm and does not provide legal, tax, or valuation advice; the paper is the deduction, and the professionals sign it. Demo data · all figures illustrative and modeled.
Evidence objects
—
defined for this estate
On file
—
executed / filed
Open
—
draft · engaged · pending
Coverage — computed
—
Document vault — evidence objects
a lever stays modeled until its object exists hereThis workstation organizes an estate's structure, paper, and evidence. It is not a law or accounting firm and does not provide legal, tax, or valuation advice. Demo data · all figures illustrative and modeled.
Audit-defense file
what an examiner asks for — coverage computed from vault attachments, never typedas of —
Standing flags this file tracks, routed and never defaulted: §2036 retained enjoyment on bad gifting (Estate of Powell, 148 T.C. 392 — FLP-style facts) · reciprocal trusts (Grace) · valuation discounts (appraiser + attorney; §2704 regulatory history noted) · Prop 19 adjacency · IDGT dual-sourcing (D18 plank) · community-vs-separate characterization · DSUE remarriage risk (§2010(c)(4)).
This workstation organizes an estate's structure, paper, and evidence. It is not a law or accounting firm and does not provide legal, tax, or valuation advice. Demo data · all figures illustrative and modeled.
Compliance calendar
derived from entity attributes and ledger activity — never hand-listedas of —
Q3 2026
SEP 01 → OCT 01
Crummey window — ILIT premium
30-day withdrawal notices, all 3 beneficiaries · derived from the ledger's premium gift
AUG 15
Qualified appraisal delivery — Okafor Mfg
derived from the engagement letter · unblocks E2/E3 evidence gates
SEP 15
Trust 1041 — extended deadline check
derived from tax_classification + fiscal year · CPA files
Q4 2026
DEC 01
Annual-exclusion program — execute before year-end
derived from the E1 program config · $19K/donee · §2503(b)
DEC 31
§6166(g) trigger review
derived: dispositions/withdrawals against the acceleration tests
Q1–Q2 2027
APR 15 2027
Form 709 — 2026 gifts, with adequate disclosure
derived from ledger gift rows · starts the §6501(c)(9) 3-yr clock · CPA files, attorney reviews disclosure
APR 15 2027
Trust 1041 + K-1s
derived from the trust-income engine's distribute branch, if elected
Contingent — first death
+9 MO (+6 ext)
Form 706 — estate return / DSUE election
§2010(c)(5)(A) · late portability relief ≤ 5 yrs — Rev. Proc. 2022-32
+30 DAYS after 706
Form 8971 — basis statements to heirs
consistent-basis reporting · derived from the 706 event
Any CA deed move
Prop 19 reassessment review
assessor regime — routed to attorney / property-tax counsel
This workstation organizes an estate's structure, paper, and evidence. It is not a law or accounting firm and does not provide legal, tax, or valuation advice. Demo data · all figures illustrative and modeled.
Aide
intake & explain over the same data — drafts, summarizes, routes flags · never books, characterizes, or files1
Gather
709 history · deeds · policy · trust instruments
2
Map
assets → title → runway exposure
3
Flag
routed determinations, evidence gaps
4
Route
attorney · appraiser · CPA queues
The aide is an intake-and-explain layer. It may draft, summarize, and route flags; it may never book a movement, characterize a transfer, or file anything.
This workstation organizes an estate's structure, paper, and evidence. It is not a law or accounting firm and does not provide legal, tax, or valuation advice; every instrument, valuation, election, and characterization is drafted, valued, ratified, and filed by the licensed estate attorney, qualified appraiser, and CPA it routes to. Demo data · all figures illustrative and modeled.