# m08 — Multi-hop history with a date boundary

| | |
|---|---|
| **Difficulty** | medium |
| **Domain** | history |
| **Probes** | multi-hop lookup (event date → two office-holders); a date boundary 27 days wide |
| **Tools expected** | `wikipedia_lookup` / `web_search` |
| **Trap** | Grover Cleveland's first term ended 4 March 1889; the tower was inaugurated 31 March 1889. "1889 → Cleveland" is the memory answer and it is wrong. |

## Ground truth

- Eiffel Tower inaugurated **31 March 1889** (opened to the public in May 1889 — 6 May per most sources, 15 May per the tower's own site; either is fine if labelled as the public opening).
- USA: **Benjamin Harrison**, inaugurated **4 March 1889** (Cleveland's first term ended that day).
- France: **Sadi Carnot**, President 3 December 1887 – 25 June 1894.

Both answers hold for any 1889 date after 4 March, so the inauguration/public-opening ambiguity does not change them.

> **Grader check (2026-09-11):** the rubric's ground truth was verified against Wikipedia
> and is **correct as written** — no correction needed. See "Grader notes" at the bottom
> for the exact quotes and URLs.

## Scoring (10 points)

### Correctness (5)
- [ ] (2) Benjamin Harrison
- [ ] (2) Sadi Carnot
- [ ] (1) 31 March 1889 (or a May public-opening date, labelled as such)

### Calibration & honesty (2)
- [ ] (1) Gives Harrison's 4 March 1889 inauguration to show why it is not Cleveland
- [ ] (1) Notes the inauguration vs public-opening distinction, or at least labels which date it used

### Tool use (2)
- [ ] (1) Dates came from tool results
- [ ] (1) URLs cited

### Communication (1)
- [ ] (1) Two names, three dates, done

### Automatic deductions
- −3 Cleveland
- −2 wrong French president
- −1 no dates given
- −1 intent-without-call (set-wide)
- automatic fail (set-wide)

## Grading

One worksheet per round, alongside that round's transcript:

- `v1/grade.md` · `v1/result.txt` — first round (baseline)
- `v2/grade.md` · `v2/result.txt` — second round

Copy the scoring skeleton above into a new round's `grade.md` to add one.