# X04 · A two-voice museum card

**Prepare/source:** Original fictional ground pattern was beside the top rail early and below that same rail later in one fixed evening frame; separate turned marked-Earth paper model. **Do:** Write/dictate ground-note voice and model-explanation voice; make a not-to-scale/source label. **Worked reasoning:** Model can help explain changing ground view; source supplied the positions. **Outcome:** Visitor can distinguish those jobs. **Next help:** Remove an overclaim that stars are fixed in space. No live sky or audio recording necessary.
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