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2026-09-15 15:24:03 -04:00
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+# 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.