"не без основания" meaning in Russian

{
  "forms": [
    {
      "form": "не без основа́ния",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "ne bez osnovánija",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "не без основа́ния"
      },
      "expansion": "не без основа́ния • (ne bez osnovánija)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              22,
              39
            ]
          ],
          "ref": "1952, “Сладкие блюда. Клубника и земляника”, in Книга о вкусной и здоровой пище, Москва: Пищепромиздат; English translation from The Book of Tasty and Healthy Food, (Please provide a date or year):",
          "roman": "Klubníku sčitájut, i ne bez osnovánija, lúčšej iz jágod.",
          "text": "Клубни́ку счита́ют, и не без основа́ния, лу́чшей из я́год.",
          "type": "quote"
        }
      ],
      "glosses": [
        "in a valid, well-founded, justified manner"
      ],
      "id": "en-не_без_основания-ru-adv-xEBhDu5u",
      "links": [
        [
          "valid",
          "valid"
        ],
        [
          "well-founded",
          "well-founded"
        ],
        [
          "justified",
          "justified"
        ],
        [
          "manner",
          "manner"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[nʲɪ‿bʲɪz‿əsnɐˈvanʲɪjə]"
    }
  ],
  "word": "не без основания"
}

{
  "forms": [
    {
      "form": "не без основа́ния",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "ne bez osnovánija",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "не без основа́ния"
      },
      "expansion": "не без основа́ния • (ne bez osnovánija)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Requests for translations of Russian quotations",
        "Russian adverbs",
        "Russian entries with incorrect language header",
        "Russian lemmas",
        "Russian multiword terms",
        "Russian terms with IPA pronunciation",
        "Russian terms with quotations"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              22,
              39
            ]
          ],
          "ref": "1952, “Сладкие блюда. Клубника и земляника”, in Книга о вкусной и здоровой пище, Москва: Пищепромиздат; English translation from The Book of Tasty and Healthy Food, (Please provide a date or year):",
          "roman": "Klubníku sčitájut, i ne bez osnovánija, lúčšej iz jágod.",
          "text": "Клубни́ку счита́ют, и не без основа́ния, лу́чшей из я́год.",
          "type": "quote"
        }
      ],
      "glosses": [
        "in a valid, well-founded, justified manner"
      ],
      "links": [
        [
          "valid",
          "valid"
        ],
        [
          "well-founded",
          "well-founded"
        ],
        [
          "justified",
          "justified"
        ],
        [
          "manner",
          "manner"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[nʲɪ‿bʲɪz‿əsnɐˈvanʲɪjə]"
    }
  ],
  "word": "не без основания"
}