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