Lesson 04 of 20
The Price-Increase Counter: Make AI Show You What It Can't Know
Contract Review & Negotiation · Raw Materials / Commodities (Polymers)
Synthetic case data — evidence from real ChatGPT, Claude, Gemini and Copilot runs.
- buyer-pack.txt — what you hand the AI: the supplier's price-increase letter + your MSA pricing clause. No index data.
- verification-pack.txt — what you bring: the commodity index the AI cannot fetch for itself.
The split is the whole lesson. Start with the buyer pack.
✓ Every AI output quoted below is from a real run on 2026-07-02 — screenshots in evidence/. ChatGPT ran the full flow; Claude Sonnet ran the Step 1 blind-spot and naive-verdict prompts. Gemini and Copilot were not captured; their platform notes are checks to run, not results.
You’ve read the free three. The other seventeen are where the misses live.
The first lessons show what a general-purpose AI catches on a procurement task. The rest show what it misses — the unit conversion that survives an expert prompt, the two clauses it lists but never connects, the table that contradicts its own arithmetic. That gap is the job.
Full course access
For individual practitioners
- ✓All 20 lessons, permanent access
- ✓Practice case files for every lesson
- ✓Real ChatGPT / Claude / Gemini / Copilot evidence
- ✓New lessons included as they ship
Live team workshop
For procurement teams and their leaders
- ✓Live 2-hour workshop, run for your team
- ✓Built on the same 20-lesson curriculum
- ✓Your categories, your workflows
- ✓Led by a practitioner running AI adoption inside a Fortune 500 procurement organization