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  "description_review": "No observed cross-family objectives. Shared JSON assertions and waveform-derived duration stay with their reusable machinery; absent interface/measurement details remain explicit uncertainty.",
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            "members": [
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            ],
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            "description": "Record acoustic output in anechoic enclosure via microphone capture and spectral-analysis fixture; assert each spectral peak below a frequency-dependent bound. Unique acoustic instrumentation not shared with other families; single case.",
            "members": [
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            ],
            "name": "Acoustic spectral-peak measurement"
          },
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            "description": "Verify a latent-state relationship where required interface, stimulus, observation mechanism, and fixture are all omitted. Insufficient evidence to determine machinery or merge; retained as standalone uncertainty.",
            "members": [
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