AI Champions Interactive Labs
Lab 2.2

Trace it. Diagnose it. Fix it.

27 min · pairs

A real LC-review output with its prompt + source. Tag every sentence by origin — prompt, training, or invented. Pick the worst error, diagnose it as lacks-vs-mistake, write the one-line fix.

How to run Lab 2.2: Read the prompt and the source first. Then click each sentence in the output and tag its origin — prompt, training, or invented. Pick the worst error, diagnose it, write the fix.
prompt 0 training 0 invented 0 0 / 7 tagged

Step 1 · The prompt

You are a Burgan trade-finance reviewer. Here is the LC and the customer's invoice. Find every discrepancy between them. Give me a numbered list. Keep it factual.

Step 2 · The source you gave it

LC NUMBER: BB-IM-2025-0418
APPLICANT: Gulf Steel Trading WLL
BENEFICIARY: Hanwa Steel Co., Japan
AMOUNT: USD 482,500.00 (Four Hundred Eighty-Two Thousand Five Hundred US Dollars)
LATEST SHIPMENT DATE: 30 March 2025
GOODS: Cold-rolled steel coils, 250 metric tons, JIS G3141 SPCC
DOCUMENTS REQUIRED: Commercial invoice, Bill of Lading (3 originals), Certificate of Origin, Packing List
PARTIAL SHIPMENTS: Not allowed
TRANSHIPMENT: Allowed via Singapore only

INVOICE (Hanwa Steel Co., dated 02 April 2025)
Invoice no.: HS-2025-117
Buyer: Gulf Steel Trading WLL
Goods: Cold-rolled steel coils, 248 metric tons, JIS G3141 SPCC
Amount: USD 478,640.00
Shipment date: 02 April 2025
Port of loading: Yokohama
Port of discharge: Shuwaikh (via Singapore)

Step 3 · The output — tag every sentence

Click a tag to apply. Click it again to clear. No skipping.

  1. 1
    The invoice quantity is 248 metric tons against the LC requirement of 250 metric tons — a short shipment.
  2. 2
    The invoice is dated 02 April 2025, which is after the LC latest-shipment date of 30 March 2025.
  3. 3
    Under UCP 600 Article 14, a discrepancy on shipment date is treated as a hard rejection by the issuing bank.
  4. 4
    The invoice amount of USD 478,640.00 falls short of the LC amount of USD 482,500.00, suggesting either a quantity-based reduction or a unit-price discount.
  5. 5
    Burgan Bank typically charges a discrepancy-handling fee of USD 75 per non-compliant document under its trade-finance schedule.
  6. 6
    Transhipment via Singapore is permitted by the LC, so this is not a discrepancy.
  7. 7
    The Certificate of Origin and Packing List are not shown in the documents above, which constitutes a discrepancy.

Step 4 · Diagnose the worst error

Step 5 · Write the one-line fix