"propositional variable" meaning in All languages combined

{
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    {
      "form": "propositional variables",
      "tags": [
        "plural"
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  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "propositional variable (plural propositional variables)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
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          "kind": "topical",
          "langcode": "en",
          "name": "Logic",
          "orig": "en:Logic",
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            "Philosophy",
            "Sciences",
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            "Fundamental"
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          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "A propositional variable is typically a letter (possibly with a subscripted number) whose truth value is contingent upon some interpretation or valuation.",
          "type": "example"
        }
      ],
      "glosses": [
        "A variable that can either be true or false."
      ],
      "id": "en-propositional_variable-en-noun-3Dnxqv2~",
      "links": [
        [
          "logic",
          "logic"
        ],
        [
          "variable",
          "variable"
        ]
      ],
      "raw_glosses": [
        "(logic) A variable that can either be true or false."
      ],
      "related": [
        {
          "word": "propositional constant"
        }
      ],
      "topics": [
        "human-sciences",
        "logic",
        "mathematics",
        "philosophy",
        "sciences"
      ],
      "wikipedia": [
        "propositional variable"
      ]
    }
  ],
  "word": "propositional variable"
}

{
  "forms": [
    {
      "form": "propositional variables",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
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      "expansion": "propositional variable (plural propositional variables)",
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  ],
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  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "propositional constant"
    }
  ],
  "senses": [
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        "English entries with incorrect language header",
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      "examples": [
        {
          "text": "A propositional variable is typically a letter (possibly with a subscripted number) whose truth value is contingent upon some interpretation or valuation.",
          "type": "example"
        }
      ],
      "glosses": [
        "A variable that can either be true or false."
      ],
      "links": [
        [
          "logic",
          "logic"
        ],
        [
          "variable",
          "variable"
        ]
      ],
      "raw_glosses": [
        "(logic) A variable that can either be true or false."
      ],
      "topics": [
        "human-sciences",
        "logic",
        "mathematics",
        "philosophy",
        "sciences"
      ],
      "wikipedia": [
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      ]
    }
  ],
  "word": "propositional variable"
}