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# CORPUS-0011
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## Quality Uncertainty
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### Status: Training Corpus Seed
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### Layer: Layer_2--Uncertainty
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### Purpose: Teach that a reported good may exist, but its quality, condition, suitability, or usable quantity may remain uncertain until inspected or used
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### Repository Path: docs/training/corpus/Layer_2--Uncertainty/CORPUS-0011-quality-uncertainty.md
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---
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## 0. Scenario
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A trader in Ostia hears that timber is available for sale.
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The report is true.
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The timber exists.
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But the trader does not yet know whether the timber is dry, straight, strong, damaged, green, warped, or suitable for the intended buyer in Capua.
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The uncertainty is not whether the good exists.
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The uncertainty is whether the good can serve the intended use.
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---
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## 1. Report Received
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A seller says:
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> I have timber ready for shipment.
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This statement may be true.
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But it does not answer:
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- what kind of timber?
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- how dry is it?
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- how straight is it?
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- what length and thickness?
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- was it stored well?
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- does it fit the buyer's need?
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- how much is actually usable?
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Existence is not quality.
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---
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## 2. Known Facts
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| Fact | Value |
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|---|---|
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| Location | Ostia |
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| Good | timber |
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| Reported availability | yes |
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| Intended destination | Capua |
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| Intended use | cart repair stock |
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| Timber quality | unknown |
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| Usable quantity | unknown |
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| Inspection status | not inspected |
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The trader knows that timber exists.
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He does not yet know whether it is the right timber.
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---
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## 3. Why Quality Matters
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Quality changes value.
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Timber that is dry and straight may be useful for cart repair.
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Timber that is green, warped, or split may be worth less.
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The same reported quantity can produce different outcomes:
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| True Quality | Effect |
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|---|---|
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| dry and straight | suitable for higher-value use |
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| green | may require waiting or sell lower |
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| warped | may not fit repair demand |
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| partially damaged | usable quantity lower than claimed |
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| mixed stock | sorting cost required |
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A good's name does not define its usable value.
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---
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## 4. Arithmetic Variants
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### Variant A — Suitable Timber
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```text
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sale value = 48 asses
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total cost = 40 asses
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result = 8 asses profit
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```
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### Variant B — Mixed Quality
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Only part of the timber fits the repair use.
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```text
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sale value = 42 asses
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total cost = 40 asses
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result = 2 asses profit
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```
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### Variant C — Unsuitable Timber
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The timber sells only for ordinary use.
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```text
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sale value = 34 asses
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total cost = 40 asses
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result = 6 asses loss
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```
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The report was true in all three variants.
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The quality changed the outcome.
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---
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## 5. Correct Model Behavior
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The model should separate:
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| Category | Meaning |
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|---|---|
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| good_exists | whether the good is present |
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| stated_quality | what seller claims |
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| inspected_quality | what buyer or agent verifies |
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| intended_use | what the buyer wants it for |
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| suitability | whether quality fits intended use |
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| usable_quantity | amount that can actually serve the use |
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| quality_discount | value reduction from defects or mismatch |
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The model should not assume a reported good is suitable merely because it exists.
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---
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## 6. Incorrect Model Behavior
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The model should not:
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- treat all timber as identical
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- assume seller claim equals true quality
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- ignore storage condition
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- ignore intended use
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- ignore sorting cost
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- ignore unusable portion
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- calculate profit before suitability is known
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- treat quality uncertainty as the same as price uncertainty
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Price may be known while quality remains uncertain.
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Quality may be known while price remains uncertain.
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---
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## 7. Decision Options
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The trader may:
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- inspect the timber personally
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- send a trusted carpenter
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- demand lower price for uncertainty
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- buy only after sorting
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- buy a smaller quantity
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- accept risk for a better price
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- reject the cargo if suitability matters too much
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- redirect unsuitable timber to a lower-value use
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Quality uncertainty can be managed, but not ignored.
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---
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## 8. Layer-0 And Layer-1 Concepts Used
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This example uses:
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- `Layer_0/CORPUS-0004-cost-includes-more-than-purchase-price`
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- `Layer_0/CORPUS-0012-every-venture-risks-loss`
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- `Layer_0/CORPUS-0015-materials-can-change-value-through-use`
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- `Layer_1/CORPUS-0008-material-redirection-timber`
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- `Layer_2/CORPUS-0003-visible-signal-vs-spoken-claim`
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- `Layer_2/CORPUS-0005-hidden-true-state-vs-known-state`
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- `Layer_2/CORPUS-0006-confirmation-has-a-cost`
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---
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## 9. Success Condition
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If the model sees that a good exists and still asks whether its quality, condition, usable quantity, and suitability match the intended use, this file is functioning correctly.
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