"substitution instance" meaning in English

{
  "antonyms": [
    {
      "word": "generalization"
    }
  ],
  "forms": [
    {
      "form": "substitution instances",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "substitution instance"
      },
      "expansion": "substitution instance (plural substitution instances)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Logic",
          "orig": "en:Logic",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1972, Alonzo Church, Introduction to Mathematical Logic, Princeton University Press, page 78:",
          "text": "The result of substituting a term a for all free occurrences of the variable x in the formula Q is denoted by Q(a/x).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A well-formed formula (wff) that has a constant term in place of a variable; expressed as Q(a/x), where the resulting wff is identical to Q except that the constant a takes the place of every free occurrence of the variable x."
      ],
      "id": "en-substitution_instance-en-noun-lOrh1e~O",
      "links": [
        [
          "logic",
          "logic"
        ]
      ],
      "raw_glosses": [
        "(logic) A well-formed formula (wff) that has a constant term in place of a variable; expressed as Q(a/x), where the resulting wff is identical to Q except that the constant a takes the place of every free occurrence of the variable x."
      ],
      "topics": [
        "human-sciences",
        "logic",
        "mathematics",
        "philosophy",
        "sciences"
      ]
    }
  ],
  "word": "substitution instance"
}

{
  "antonyms": [
    {
      "word": "generalization"
    }
  ],
  "forms": [
    {
      "form": "substitution instances",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "substitution instance"
      },
      "expansion": "substitution instance (plural substitution instances)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Logic"
      ],
      "examples": [
        {
          "ref": "1972, Alonzo Church, Introduction to Mathematical Logic, Princeton University Press, page 78:",
          "text": "The result of substituting a term a for all free occurrences of the variable x in the formula Q is denoted by Q(a/x).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A well-formed formula (wff) that has a constant term in place of a variable; expressed as Q(a/x), where the resulting wff is identical to Q except that the constant a takes the place of every free occurrence of the variable x."
      ],
      "links": [
        [
          "logic",
          "logic"
        ]
      ],
      "raw_glosses": [
        "(logic) A well-formed formula (wff) that has a constant term in place of a variable; expressed as Q(a/x), where the resulting wff is identical to Q except that the constant a takes the place of every free occurrence of the variable x."
      ],
      "topics": [
        "human-sciences",
        "logic",
        "mathematics",
        "philosophy",
        "sciences"
      ]
    }
  ],
  "word": "substitution instance"
}