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+# CORPUS-0004
+## Small Profit Versus Future Access
+### Status: Training Corpus Seed
+### Layer: Layer_1--Worked_Examples
+### Purpose: Teach that immediate arithmetic outcome and future strategic value must be tracked separately
+### Repository Path: docs/training/corpus/Layer_1--Worked_Examples/CORPUS-0004-small-profit-vs-future-access.md
+
+---
+
+## 0. Scenario
+
+A trader sends oil from Ostia to Capua.
+
+The venture produces only a small coin profit.
+
+However, the buyer pays promptly and invites the trader to supply again.
+
+The immediate arithmetic outcome is small.
+
+The future access may be valuable.
+
+These are related, but they are not the same thing.
+
+---
+
+## 1. Known Final Values
+
+| Item | Value |
+|---|---:|
+| Sale value in Capua | 18 asses |
+| Total cost | 17 asses |
+| Final arithmetic outcome | 1 as profit |
+
+The venture earns only 1 as.
+
+By coin arithmetic, the result is small.
+
+---
+
+## 2. Additional Strategic Result
+
+The buyer in Capua is satisfied.
+
+The trader gains:
+
+- a reliable buyer contact
+- faster future negotiation
+- possible deferred payment trust
+- better information about Capua demand
+- improved chance of repeat sale
+
+These gains may matter later.
+
+They are not coin profit from the completed venture.
+
+---
+
+## 3. Incorrect Model Behavior
+
+A weak model may say:
+
+> The venture was very profitable because it created a valuable relationship.
+
+This is imprecise.
+
+The correct separation is:
+
+```text
+immediate profit = 1 as
+strategic value = improved future access
+```
+
+The future access may be more important than the 1 as.
+
+But it must be recorded separately.
+
+---
+
+## 4. Correct Model Behavior
+
+The model should record two outcomes:
+
+| Outcome Type | Result |
+|---|---|
+| arithmetic outcome | 1 as profit |
+| strategic outcome | buyer relationship improved |
+
+The model may then reason:
+
+- the immediate venture barely profited
+- the trader may repeat the route under better terms
+- future credit or information may improve
+- the small profit was acceptable because it created access
+
+But the model should not rewrite the arithmetic result.
+
+---
+
+## 5. Variant: Rational Small Loss
+
+The same logic applies if the venture loses a small amount.
+
+| Item | Value |
+|---|---:|
+| Sale value | 16 asses |
+| Total cost | 17 asses |
+| Final arithmetic outcome | 1 as loss |
+
+If the buyer relationship becomes valuable, the venture may still have strategic value.
+
+But the immediate account remains:
+
+```text
+1 as loss
+```
+
+A strategic loss is still a loss.
+
+---
+
+## 6. Why This Matters
+
+If strategic value is merged into profit, the model becomes confused.
+
+It may:
+
+- ignore arithmetic
+- call losses profitable
+- overvalue vague future benefits
+- fail to track coin depletion
+- miss hard-stop risk
+
+If strategic value is ignored, the model becomes too narrow.
+
+It may:
+
+- reject useful market-entry ventures
+- miss trust-building behavior
+- ignore future access
+- undervalue repeat buyers
+
+Both errors are harmful.
+
+---
+
+## 7. Correct Accounting Separation
+
+Use separate records:
+
+```text
+coin_result: +1 as
+relationship_result: buyer_trust_up
+information_result: capua_oil_demand_known_better
+future_access_result: repeat_sale_possible
+```
+
+Do not merge all of these into one number.
+
+---
+
+## 8. Layer-0 Concepts Used
+
+This example uses:
+
+- `CORPUS-0005-profit-is-sale-minus-total-cost`
+- `CORPUS-0006-delay-is-economic-cost`
+- `CORPUS-0010-credit-depends-on-trust`
+- `CORPUS-0011-status-changes-access`
+- `CORPUS-0012-every-venture-risks-loss`
+- `CORPUS-0019-success-has-no-boundary-failure-has-a-hard-stop`
+- `CORPUS-0020-posture-changes-by-audience`
+
+---
+
+## 9. Success Condition
+
+If the model can say, “This venture made only 1 as, but improved future access,” without confusing the access gain with immediate profit, this file is functioning correctly.