{
  "id": 13906,
  "title": "Are account and email fields redundant?",
  "url": "/competitions/facebook-recruiting-iv-human-or-bot/discussion/13906",
  "author_name": "",
  "post_date": "2015-05-01T00:35:37.743Z",
  "votes": 5,
  "comment_count": 5,
  "views": 1508,
  "content": "<p>Hi all,</p>\n<p>Looks like all values of account and email fields are unique. Any ideas why we have them in data then?</p>\n<p>Thanks!</p>",
  "messages": [
    {
      "id": "75820",
      "postDate": "05/01/2015 00:35:37",
      "content": "<p>Hi all,</p>\n<p>Looks like all values of account and email fields are unique. Any ideas why we have them in data then?</p>\n<p>Thanks!</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "75840",
      "postDate": "05/01/2015 02:19:02",
      "content": "<p>Is there an explanation for this question?</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "76398",
      "postDate": "05/03/2015 19:09:53",
      "content": "<p>I wonder the same. It is probably provided to check their uniqueness. We could&nbsp;drop them from modeling since they are unique.</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "76515",
      "postDate": "05/04/2015 06:38:43",
      "content": "<p>Yes, I checked the uniqueness of account and address.</p>\n<p>In the training data, 1 account/address only serves 1 bidder.</p>\n<p>In the test data, there is no account/address that exists in the training data.</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "76763",
      "postDate": "05/05/2015 00:18:26",
      "content": "<p>Perhaps there are naming patterns for accounts and email addresses that are used by robots?!?!</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "77209",
      "postDate": "05/06/2015 02:15:46",
      "content": "<p>Unfortunately , given that these fields are the same length I suspect that they&nbsp;contain the output of a one way hash function (e.g. SHA-1). &nbsp;If that's the case there is no chance of detecting any patterns in the raw data.</p>",
      "rawMarkdown": "",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 75840,
      "author_name": "sourena1",
      "author_url": "",
      "post_date": "05/01/2015 02:19:02",
      "content": "<p>Is there an explanation for this question?</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 76398,
      "author_name": "pappakrishnan",
      "author_url": "",
      "post_date": "05/03/2015 19:09:53",
      "content": "<p>I wonder the same. It is probably provided to check their uniqueness. We could&nbsp;drop them from modeling since they are unique.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 76515,
      "author_name": "bluesilence",
      "author_url": "",
      "post_date": "05/04/2015 06:38:43",
      "content": "<p>Yes, I checked the uniqueness of account and address.</p>\n<p>In the training data, 1 account/address only serves 1 bidder.</p>\n<p>In the test data, there is no account/address that exists in the training data.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 76763,
      "author_name": "morsecode",
      "author_url": "",
      "post_date": "05/05/2015 00:18:26",
      "content": "<p>Perhaps there are naming patterns for accounts and email addresses that are used by robots?!?!</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 77209,
      "author_name": "danielthomas",
      "author_url": "",
      "post_date": "05/06/2015 02:15:46",
      "content": "<p>Unfortunately , given that these fields are the same length I suspect that they&nbsp;contain the output of a one way hash function (e.g. SHA-1). &nbsp;If that's the case there is no chance of detecting any patterns in the raw data.</p>",
      "votes": null,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "75820": "",
    "75840": "",
    "76398": "",
    "76515": "",
    "76763": "",
    "77209": ""
  },
  "source": "meta"
}