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    "headline": "The Spectrum Could Not Name What the Instrument Could Not Separate",
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    "dek": "A measurement-aware framework mapped which molecular conformers remain indistinguishable at finite resolution.",
    "summary": "A measurement-aware framework mapped which molecular conformers remain indistinguishable at finite resolution.",
    "body_text": "A preprint treats conformer assignment as an identifiability problem determined by both the instrument and the uncertainty model. Applied to three audited molecular ensembles, infrared spectra separated all non-mirror pairs under one working model, while mirror partners remained exactly degenerate for the achiral measurements. Under a more conservative stress test, n-pentane developed an additional ambiguity that selected Raman windows could remove. The result is a framework and case analysis, not a claim that infrared measurements are generally sufficient for every molecule or calibration regime.",
    "why_it_matters": "A measurement-aware framework mapped which molecular conformers remain indistinguishable at finite resolution.",
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      "The result is a framework and case analysis, not a claim that infrared measurements are generally sufficient for every molecule or calibration regime."
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    "tags": [
      "spectroscopy",
      "molecular conformers",
      "measurement design"
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      "source_id": "source-2026-08-05-016",
      "title": "arXiv preprint 2608.02637",
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