{
  "schema_version": 1,
  "concept_key": "none",
  "minimum_approved": 6,
  "briefs": [
    {
      "asset_key": "none_isolated_01",
      "purpose": "identification",
      "difficulty": 1,
      "brief": "One clear, realistic none centred on a plain neutral background; whole target visible; no text or logo.",
      "status": "brief_ready"
    },
    {
      "asset_key": "none_natural_context_01",
      "purpose": "meaning",
      "difficulty": 1,
      "brief": "A realistic everyday scene where none is the unambiguous target; simple background and one relevant contextual cue.",
      "status": "brief_ready"
    },
    {
      "asset_key": "none_variation_01",
      "purpose": "generalisation",
      "difficulty": 2,
      "brief": "A meaningfully different valid example of none—different instance, actor, form, size or setting without changing the concept.",
      "status": "brief_ready"
    },
    {
      "asset_key": "none_viewpoint_01",
      "purpose": "generalisation",
      "difficulty": 2,
      "brief": "The same concept none from a different viewpoint or distance, still fully recognizable and naturally lit.",
      "status": "brief_ready"
    },
    {
      "asset_key": "none_context_complex_01",
      "purpose": "discrimination",
      "difficulty": 3,
      "brief": "None in a moderately busy but realistic setting; target remains visible without positional or colour cueing.",
      "status": "brief_ready"
    },
    {
      "asset_key": "none_unfamiliar_01",
      "purpose": "generalisation_probe",
      "difficulty": 3,
      "brief": "A novel valid exemplar of none unlike the teaching set, suitable for an unprompted generalisation probe.",
      "status": "brief_ready"
    }
  ]
}