{
  "version": 1,
  "lede": "With the evidence we have so far.",
  "status_guide": "established = well supported in the literature · inferred = reasonable from current evidence · speculative = open question or early idea",
  "statuses": ["established", "inferred", "speculative"],
  "hypotheses": [
    {
      "id": "coda-combinatorial",
      "statement": "Sperm whale codas exhibit contextual and combinatorial structure that can be catalogued as reusable units and sequences.",
      "status": "inferred",
      "domains": ["sound", "behaviour"],
      "evidence": [
        {
          "label": "Sharma et al. 2024 · Nature Communications",
          "url": "https://doi.org/10.1038/s41467-024-47221-8"
        },
        {
          "label": "Gero et al. 2016 · identity cues in codas",
          "url": "https://doi.org/10.1098/rsos.150372"
        },
        {
          "label": "Archive · Dominica/CETI-related coda collections (subsets public · full sets restricted)",
          "url": "https://www.projectceti.org/"
        }
      ],
      "test": "Map coda types against concurrent social context (group composition, surface behaviour) on published Dominica/CETI-related annotations before claiming function."
    },
    {
      "id": "signature-whistle-identity",
      "statement": "Bottlenose dolphin signature whistles function as stable individual identity labels within a broader whistle repertoire.",
      "status": "established",
      "domains": ["sound", "behaviour"],
      "evidence": [
        {
          "label": "Janik & Sayigh 2013 · 50 years of signature whistle research",
          "url": "https://doi.org/10.1007/s00359-013-0817-7"
        },
        {
          "label": "Archive · Sarasota Dolphin Whistle Database (research access · not a public dump)",
          "url": "https://sarasotadolphin.org/"
        }
      ],
      "test": "Replication on new populations must keep identity claims tied to playback and association data, not spectrogram shape alone · Sarasota-class known-individual sets when access is appropriate."
    },
    {
      "id": "orca-clan-dialect",
      "statement": "Resident killer whale clans maintain structured vocal dialects that are socially learned repertoires, not fixed genetic scripts.",
      "status": "inferred",
      "domains": ["sound", "behaviour"],
      "evidence": [
        {
          "label": "Ford 1991 · vocal traditions among resident killer whales",
          "url": "https://doi.org/10.1139/z91-206"
        },
        {
          "label": "Rendell & Whitehead 2001 · culture in whales and dolphins",
          "url": "https://doi.org/10.1017/S0140525X0100396X"
        },
        {
          "label": "Archive · open orca annotated sets (NCEI / Dryad / Orcasound · check license)",
          "url": "https://www.ncei.noaa.gov/products/passive-acoustic-data"
        }
      ],
      "test": "Compare dialect stability against documented association networks and known matrilines where both exist in the same dataset."
    },
    {
      "id": "noise-shapes-vocal",
      "statement": "Anthropogenic ocean noise changes when and how some cetaceans vocalise, so structure cannot be read apart from acoustic habitat.",
      "status": "inferred",
      "domains": ["sound", "behaviour", "ecology"],
      "evidence": [
        {
          "label": "Tyack 2008 · large-scale acoustic environment change",
          "url": "https://doi.org/10.1644/07-MAMM-S-307R.1"
        },
        {
          "label": "Southall et al. 2007 · noise exposure criteria",
          "url": "https://doi.org/10.1578/AM.33.4.2007.411"
        }
      ],
      "test": "Pair call-rate or repertoire metrics with measured ambient noise and behaviour logs in the same time window."
    },
    {
      "id": "multimodal-meaning",
      "statement": "Plausible meaning in cetacean communication is multimodal: acoustic structure without behaviour and context is incomplete evidence.",
      "status": "speculative",
      "domains": ["sound", "behaviour", "methods"],
      "evidence": [
        {
          "label": "Whitehead 2003 · social evolution frame for sperm whales",
          "url": "https://press.uchicago.edu/ucp/books/book/chicago/S/bo3636624.html"
        },
        {
          "label": "Marino et al. 2007 · complex cognition (disciplined claim)",
          "url": "https://doi.org/10.1371/journal.pbio.0050139"
        }
      ],
      "test": "Any meaning hypothesis must list required non-acoustic observations; if those are missing, status stays speculative."
    }
  ]
}