"true-false" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "true-false (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "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"
        }
      ],
      "coordinate_terms": [
        {
          "word": "multiple-choice"
        },
        {
          "word": "open-ended"
        }
      ],
      "examples": [
        {
          "text": "Somehow he got one true-false question wrong out of twenty.",
          "type": "example"
        },
        {
          "text": "Grading the twenty-question true-false quiz took only 30 seconds per student.",
          "type": "example"
        }
      ],
      "glosses": [
        "Allowing only the answers \"true\" or \"false\"."
      ],
      "id": "en-true-false-en-adj-oXdeCo0L",
      "related": [
        {
          "word": "closed question"
        },
        {
          "word": "polar question"
        },
        {
          "word": "yes-no question"
        }
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "true-false"
}

{
  "coordinate_terms": [
    {
      "word": "multiple-choice"
    },
    {
      "word": "open-ended"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "true-false (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "closed question"
    },
    {
      "word": "polar question"
    },
    {
      "word": "yes-no question"
    }
  ],
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with usage examples",
        "English uncomparable adjectives",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "Somehow he got one true-false question wrong out of twenty.",
          "type": "example"
        },
        {
          "text": "Grading the twenty-question true-false quiz took only 30 seconds per student.",
          "type": "example"
        }
      ],
      "glosses": [
        "Allowing only the answers \"true\" or \"false\"."
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "true-false"
}