"non si" meaning in Galician

{
  "head_templates": [
    {
      "args": {
        "1": "gl",
        "2": "phrase"
      },
      "expansion": "non si",
      "name": "head"
    }
  ],
  "lang": "Galician",
  "lang_code": "gl",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Galician entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "There's no doubt about this, isn't it?",
          "ref": "1895, Antonio López Ferreiro, O castelo de Pambre, page 19",
          "text": "Esto non oferece duda ¿non si?",
          "type": "quotation"
        }
      ],
      "glosses": [
        "isn't it so?"
      ],
      "id": "en-non_si-gl-phrase-rRCg9RVP",
      "links": [
        [
          "isn't it so",
          "isn't it so"
        ]
      ]
    }
  ],
  "word": "non si"
}

{
  "head_templates": [
    {
      "args": {
        "1": "gl",
        "2": "phrase"
      },
      "expansion": "non si",
      "name": "head"
    }
  ],
  "lang": "Galician",
  "lang_code": "gl",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "Galician entries with incorrect language header",
        "Galician lemmas",
        "Galician multiword terms",
        "Galician phrases",
        "Galician terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "english": "There's no doubt about this, isn't it?",
          "ref": "1895, Antonio López Ferreiro, O castelo de Pambre, page 19",
          "text": "Esto non oferece duda ¿non si?",
          "type": "quotation"
        }
      ],
      "glosses": [
        "isn't it so?"
      ],
      "links": [
        [
          "isn't it so",
          "isn't it so"
        ]
      ]
    }
  ],
  "word": "non si"
}