{
  "id": 20766,
  "title": "Why its a data leak when its out of time?",
  "url": "/competitions/expedia-hotel-recommendations/discussion/20766",
  "author_name": "",
  "post_date": "2016-05-06T12:34:14.267Z",
  "votes": null,
  "comment_count": 3,
  "views": 709,
  "content": "<p>Hi Kagglers,</p>\n\n<p>If there is some match on distance and location (between teat and train data) then its just showing that same travelers visit same hotel cluster at a later point in time. And that too is not true for all the repeat travelers so why are we calling it a data leak?</p>",
  "messages": [
    {
      "id": "118967",
      "postDate": "05/06/2016 12:34:14",
      "content": "<p>Hi Kagglers,</p>\n\n<p>If there is some match on distance and location (between teat and train data) then its just showing that same travelers visit same hotel cluster at a later point in time. And that too is not true for all the repeat travelers so why are we calling it a data leak?</p>",
      "rawMarkdown": "Hi Kagglers,\r\n\r\nIf there is some match on distance and location (between teat and train data) then its just showing that same travelers visit same hotel cluster at a later point in time. And that too is not true for all the repeat travelers so why are we calling it a data leak?",
      "votes": null
    },
    {
      "id": "118970",
      "postDate": "05/06/2016 13:02:00",
      "content": "<p>@CarrDelling <a href=\"https://www.kaggle.com/c/expedia-hotel-recommendations/forums/t/20730/data-leak-explanation/118802#post118802\">explained it well</a>.</p>",
      "rawMarkdown": "CarrDelling [explained it well](https://www.kaggle.com/c/expedia-hotel-recommendations/forums/t/20730/data-leak-explanation/118802#post118802).",
      "votes": null
    },
    {
      "id": "118971",
      "postDate": "05/06/2016 13:02:27",
      "content": "<p>There is only one hotel located in B of distance D from you A. This hotel is (generally) grouped in one concrete cluster C, so knowing A and D, you generally know C.</p>",
      "rawMarkdown": "There is only one hotel located in B of distance D from you A. This hotel is (generally) grouped in one concrete cluster C, so knowing A and D, you generally know C.",
      "votes": null
    },
    {
      "id": "118973",
      "postDate": "05/06/2016 13:12:56",
      "content": "<p>Thanks for the clarification @ dune_dweller and @Grzegorz Sionkowski</p>",
      "rawMarkdown": "Thanks for the clarification @ dune_dweller and @Grzegorz Sionkowski",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 118970,
      "author_name": "dvasyukova",
      "author_url": "",
      "post_date": "05/06/2016 13:02:00",
      "content": "<p>@CarrDelling <a href=\"https://www.kaggle.com/c/expedia-hotel-recommendations/forums/t/20730/data-leak-explanation/118802#post118802\">explained it well</a>.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 118971,
      "author_name": "sionek",
      "author_url": "",
      "post_date": "05/06/2016 13:02:27",
      "content": "<p>There is only one hotel located in B of distance D from you A. This hotel is (generally) grouped in one concrete cluster C, so knowing A and D, you generally know C.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 118973,
      "author_name": "outliar",
      "author_url": "",
      "post_date": "05/06/2016 13:12:56",
      "content": "<p>Thanks for the clarification @ dune_dweller and @Grzegorz Sionkowski</p>",
      "votes": null,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "118967": "Hi Kagglers,\r\n\r\nIf there is some match on distance and location (between teat and train data) then its just showing that same travelers visit same hotel cluster at a later point in time. And that too is not true for all the repeat travelers so why are we calling it a data leak?",
    "118970": "CarrDelling [explained it well](https://www.kaggle.com/c/expedia-hotel-recommendations/forums/t/20730/data-leak-explanation/118802#post118802).",
    "118971": "There is only one hotel located in B of distance D from you A. This hotel is (generally) grouped in one concrete cluster C, so knowing A and D, you generally know C.",
    "118973": "Thanks for the clarification @ dune_dweller and @Grzegorz Sionkowski"
  },
  "source": "meta"
}