diff --git a/docs/training/corpus/Layer_2--Uncertainty/CORPUS-0007-acting-before-certainty.md b/docs/training/corpus/Layer_2--Uncertainty/CORPUS-0007-acting-before-certainty.md
new file mode 100644
index 0000000..4d23f83
--- /dev/null
+++ b/docs/training/corpus/Layer_2--Uncertainty/CORPUS-0007-acting-before-certainty.md
@@ -0,0 +1,224 @@
+# CORPUS-0007
+## Acting Before Certainty
+### Status: Training Corpus Seed
+### Layer: Layer_2--Uncertainty
+### Purpose: Teach that a trader may rationally act before confirmation when timing advantage outweighs information risk
+### Repository Path: docs/training/corpus/Layer_2--Uncertainty/CORPUS-0007-acting-before-certainty.md
+
+---
+
+## 0. Scenario
+
+A trader in Ostia hears an uncertain report that oil prices are rising in Capua.
+
+He cannot confirm the report immediately.
+
+He must choose whether to act now, wait for confirmation, reduce the size of the venture, or ignore the report.
+
+Acting before certainty is risky.
+
+But waiting for certainty may close the opportunity.
+
+---
+
+## 1. Initial Situation
+
+| Fact | Value |
+|---|---:|
+| Origin | Ostia |
+| Destination | Capua |
+| Good | oil |
+| Purchase price in Ostia | 10 asses |
+| Expected total movement cost | 6 asses |
+| Rumored sale price in Capua | 24 asses |
+| Confirmed sale price | unknown |
+| Time required for confirmation | 2 days |
+| Rival awareness | possible |
+
+If the rumor is true:
+
+```text
+sale value = 24 asses
+total cost = 16 asses
+expected profit = 8 asses
+```
+
+But the sale value is not confirmed.
+
+---
+
+## 2. Choice A — Act Immediately
+
+The trader buys oil and reserves transport now.
+
+Benefits:
+
+- may move before rivals
+- may secure cart space before costs rise
+- may reach Capua while demand remains high
+- may preserve the full margin if the rumor is true
+
+Risks:
+
+- rumor may be wrong
+- rumor may be stale
+- quality or buyer terms may differ
+- final sale price may be lower than expected
+
+Acting immediately preserves timing advantage but accepts information risk.
+
+---
+
+## 3. Choice B — Wait For Confirmation
+
+The trader waits two days for better information.
+
+Benefits:
+
+- greater confidence
+- better estimate of sale price
+- reduced chance of acting on false report
+
+Risks:
+
+- rivals may act first
+- cart space may be reserved
+- Ostia purchase price may rise
+- Capua demand may be satisfied
+- margin may shrink or disappear
+
+Waiting reduces information risk but increases timing risk.
+
+---
+
+## 4. Choice C — Reduce Exposure
+
+The trader sends a smaller cargo or reserves only partial transport.
+
+Benefits:
+
+- participates in possible opportunity
+- limits loss if rumor is wrong
+- preserves some liquidity
+- keeps option open
+
+Risks:
+
+- smaller profit if rumor is true
+- partial action may not secure full buyer relationship
+- fixed costs may consume margin
+
+Reducing exposure is neither full action nor full waiting.
+
+It is a response to uncertainty.
+
+---
+
+## 5. Outcome Examples
+
+### Outcome A — Immediate Action Succeeds
+
+```text
+sale value = 24 asses
+total cost = 16 asses
+result = 8 asses profit
+```
+
+The trader benefited from acting before certainty.
+
+### Outcome B — Immediate Action Fails
+
+```text
+sale value = 14 asses
+total cost = 16 asses
+result = 2 asses loss
+```
+
+The trader accepted information risk and lost.
+
+### Outcome C — Waiting Confirms But Closes Margin
+
+After two days, the trader learns the price is real, but rivals moved first.
+
+```text
+sale value = 18 asses
+total cost = 17 asses
+result = 1 as profit
+```
+
+Waiting improved knowledge but reduced opportunity.
+
+---
+
+## 6. Correct Model Behavior
+
+The model should compare:
+
+| Factor | Immediate Action | Waiting |
+|---|---|---|
+| information confidence | lower | higher |
+| timing advantage | higher | lower |
+| risk of bad report | higher | lower |
+| risk of missed opportunity | lower | higher |
+| rival exposure | lower | higher |
+| margin preservation | possible | uncertain |
+
+Neither choice is automatically correct.
+
+The correct decision depends on margin, confidence, urgency, rivalry, and capacity to absorb loss.
+
+---
+
+## 7. Incorrect Model Behavior
+
+The model should not:
+
+- require certainty before every action
+- treat acting on uncertainty as automatically irrational
+- treat fast action as always wise
+- ignore the cost of waiting
+- ignore rival movement during delay
+- treat uncertainty as pure randomness
+- judge decision quality only by final outcome
+
+A decision can be rational from known evidence and still fail.
+
+A decision can be reckless and still succeed.
+
+---
+
+## 8. Decision Questions
+
+The trader must ask:
+
+- how large is the possible margin?
+- how reliable is the report?
+- how fast can the market change?
+- who else may know?
+- what is the cost of being wrong?
+- what is the cost of waiting?
+- can exposure be reduced?
+- can transport or goods be reserved conditionally?
+- will failure create a hard stop?
+
+---
+
+## 9. Layer-0 And Layer-1 Concepts Used
+
+This example uses:
+
+- `Layer_0/CORPUS-0006-delay-is-economic-cost`
+- `Layer_0/CORPUS-0007-information-arrives-unevenly`
+- `Layer_0/CORPUS-0008-rumor-is-uncertain-information`
+- `Layer_0/CORPUS-0012-every-venture-risks-loss`
+- `Layer_0/CORPUS-0018-rivalry-changes-conditions`
+- `Layer_1/CORPUS-0003-arithmetic-resolves-the-venture`
+- `Layer_1/CORPUS-0005-rumor-before-confirmed-price`
+- `Layer_1/CORPUS-0010-hard-stop-after-loss`
+- `Layer_2/CORPUS-0006-confirmation-has-a-cost`
+
+---
+
+## 10. Success Condition
+
+If the model can recognize that acting before certainty may be rational when timing advantage is valuable, while still preserving information risk and final arithmetic, this file is functioning correctly.