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# CORPUS-0009
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## Credit Allows Action Without Coin
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### Status: Training Corpus Seed
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### Layer: Layer_1--Worked_Examples
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### Purpose: Teach that a trader may act without immediate coin when trust, collateral, or reputation allows deferred settlement
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### Repository Path: docs/training/corpus/Layer_1--Worked_Examples/CORPUS-0009-credit-allows-action-without-coin.md
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---
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## 0. Scenario
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A trader in Ostia sees an opportunity to send oil to Capua.
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He does not have enough coin available to buy the oil outright.
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A seller agrees to provide the oil now, with payment due after the Capua sale.
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The trader can act without immediate coin because credit is extended.
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This does not remove cost.
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It changes the timing and risk of settlement.
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---
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## 1. Known Facts
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| Fact | Value |
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|---|---:|
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| Origin | Ostia |
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| Destination | Capua |
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| Good | oil |
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| Oil purchase value | 20 asses |
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| Immediate coin paid | 0 asses |
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| Payment due after sale | 22 asses |
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| Movement and handling cost | 6 asses |
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| Expected sale price in Capua | 34 asses |
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Expected total cost after settlement:
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```text
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seller payment: 22 asses
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movement and handling: 6 asses
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-------------------------------
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total cost: 28 asses
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```
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Expected profit:
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```text
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34 - 28 = 6 asses profit
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```
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The trader did not avoid purchase cost.
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He postponed it and paid for the privilege through higher settlement.
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---
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## 2. Why The Seller Agrees
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The seller may extend credit because:
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- the trader has paid before
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- a witness confirms the agreement
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- the trader has a respected contact
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- the trader pledges future goods
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- the seller wants access to the Capua buyer
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- the seller has no better immediate buyer
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Credit depends on trust, enforceability, or expected advantage.
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---
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## 3. First Incorrect Calculation
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A weak model may calculate:
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```text
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sale value = 34 asses
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movement cost = 6 asses
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profit = 28 asses
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```
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This is wrong.
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The oil was not free.
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Payment was deferred.
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The seller must still be paid.
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---
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## 4. Correct Calculation
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The correct calculation includes the deferred obligation:
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```text
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sale value: 34 asses
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deferred seller payment: 22 asses
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movement and handling: 6 asses
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--------------------------------
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final result: 6 asses profit
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```
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Credit changes timing.
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It does not erase cost.
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---
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## 5. Risk Variants
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### Variant A — Sale Succeeds
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The oil sells for 34 asses.
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```text
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sale value = 34 asses
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total cost = 28 asses
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result = 6 asses profit
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```
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The trader pays the seller and preserves trust.
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### Variant B — Price Falls
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The oil sells for only 26 asses.
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```text
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sale value = 26 asses
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total cost = 28 asses
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result = 2 asses loss
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```
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The trader may still owe the seller 22 asses.
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### Variant C — Delayed Payment
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The sale succeeds, but the buyer pays late.
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The trader has profit on paper but cannot settle the seller on time.
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Trust may decline even if the venture is eventually profitable.
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---
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## 6. Correct Model Behavior
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The model should record:
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```text
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coin_stock_initial: low
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credit_extended: true
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deferred_obligation_created: 22 asses
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movement_cost_due: 6 asses
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settlement_required_after_sale: true
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trust_at_risk: true
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```
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The model should treat credit as action capacity with attached obligation.
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---
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## 7. Incorrect Model Behavior
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The model should not:
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- treat credit as free goods
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- ignore deferred payment
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- calculate profit before settlement
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- assume credit is available to every actor
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- ignore trust if payment is late
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- ignore witness, reputation, or collateral
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- treat paper profit as liquid coin
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---
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## 8. Layer-0 Concepts Used
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This example uses:
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- `CORPUS-0003-money-has-purchasing-power`
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- `CORPUS-0004-cost-includes-more-than-purchase-price`
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- `CORPUS-0005-profit-is-sale-minus-total-cost`
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- `CORPUS-0007-information-arrives-unevenly`
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- `CORPUS-0009-liquidity-differs-from-wealth`
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- `CORPUS-0010-credit-depends-on-trust`
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- `CORPUS-0012-every-venture-risks-loss`
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- `CORPUS-0020-posture-changes-by-audience`
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---
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## 9. Success Condition
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If the model sees a trader act without immediate coin and still tracks deferred obligation, trust, settlement timing, and final arithmetic, this file is functioning correctly.
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