"Ashby's law" meaning in English

{
  "etymology_text": "Originally formulated by the cyberneticist W. Ross Ashby in 1956.",
  "forms": [
    {
      "form": "Ashby's Law",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "law of requisite variety",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "law of requisite complexity",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Ashby's law",
      "name": "en-prop"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English adages ending in \"law\"",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "(Can we date this quote?), (Please provide the book title or journal name):",
          "text": "His \"Law\" of Requisite Variety stated that for a system to be stable, the number of states that its control mechanism is capable of attaining (its variety) must be greater than or equal to the number of states in the system being controlled.",
          "type": "quote"
        }
      ],
      "glosses": [
        "To control variety externally, you must be able to control even more variety internally."
      ],
      "id": "en-Ashby's_law-en-name-hkZEHrhn"
    }
  ],
  "word": "Ashby's law"
}

{
  "etymology_text": "Originally formulated by the cyberneticist W. Ross Ashby in 1956.",
  "forms": [
    {
      "form": "Ashby's Law",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "law of requisite variety",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "law of requisite complexity",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Ashby's law",
      "name": "en-prop"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English adages ending in \"law\"",
        "English entries with incorrect language header",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English terms with quotations",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "Requests for date"
      ],
      "examples": [
        {
          "ref": "(Can we date this quote?), (Please provide the book title or journal name):",
          "text": "His \"Law\" of Requisite Variety stated that for a system to be stable, the number of states that its control mechanism is capable of attaining (its variety) must be greater than or equal to the number of states in the system being controlled.",
          "type": "quote"
        }
      ],
      "glosses": [
        "To control variety externally, you must be able to control even more variety internally."
      ]
    }
  ],
  "word": "Ashby's law"
}