{
  "handle": "NaturalProblem",
  "ref": "NaturalProblem#4e94",
  "stub": "4e94",
  "semaId": "sema:NaturalProblem#mh:SHA-256:4e940c2ed5bebfb77fde543364639381f4cfa06c685032a75d657bdc05fc410a",
  "layer": "Mind",
  "category": "Reasoning",
  "gloss": "A problem where making attempts comparable is what prevents solving it",
  "mechanism": "Meta-precision is the shared metric that makes attempts commensurable; meta-accuracy is hitting any of several available targets, each with its own encoding. In artificial problems the two coincide, because the ranking metric also defines success. In a natural problem raising meta-accuracy necessarily costs meta-precision, and the signature is loss of commensurability, as in alternative splicing or disordered proteins. This is one form {{bounded_model_open_world}} takes when a single metric is imposed.",
  "invariants": [
    "In a natural problem no single distance-to-fitness can be computed across all targets",
    "Standardising the metric forecloses the targets it does not rank"
  ],
  "failureModes": [
    "Single-objective optimisation stalls in local minima that a single metric cannot cross",
    "Standardising terminology or benchmarks before a domain is understood"
  ],
  "ring": 2,
  "tier": 3,
  "aliases": {
    "bounded_model_open_world": "BoundedModelOpenWorld"
  },
  "buildsOn": [
    {
      "handle": "BoundedModelOpenWorld",
      "type": "references",
      "alias": "bounded_model_open_world",
      "url": "/knowledge-graph/BoundedModelOpenWorld/",
      "json": "/knowledge-graph/BoundedModelOpenWorld.json"
    }
  ],
  "usedBy": [],
  "sources": {
    "research": [
      {
        "slug": "on_the_origin_of_risk",
        "title": "On the Origin of Risk",
        "url": "/research/on_the_origin_of_risk/",
        "meetups": [],
        "people": [
          {
            "name": "Arne Steemers",
            "url": "/community#arne-steemers"
          },
          {
            "name": "Adam Timlett",
            "url": "/community#adam-timlett"
          }
        ]
      }
    ],
    "works": [],
    "homePage": false
  },
  "url": "/knowledge-graph/NaturalProblem/",
  "graphUrl": "/knowledge-graph#NaturalProblem",
  "directory": "/knowledge-graph/patterns.json"
}