{
  "export": {
    "source": "https://urth.darkrealm.vip/thread/urth/3585",
    "note": "Exported from an unofficial mirror of a public mailing list. Copyright in each message remains with the person who wrote it.  Email addresses are obscured as `user at host`, the form the original archive published. This file was rebuilt from parsed fields rather than retained headers, so it is faithful in content but not byte-exact.",
    "addresses": "obscured as 'user at host'"
  },
  "archive": "urth",
  "thread": {
    "id": 3585,
    "subject": "FTL Travel",
    "messages": 16,
    "voices": 8,
    "first": "2002-11-18T15:56:33+00:00",
    "last": "2002-11-20T20:56:11+00:00"
  },
  "messages": [
    {
      "message_id": "<urth-v0211-2148@digest.urth.net>",
      "from": {
        "name": "James Wynn",
        "address": "crushtv at hotpop.com"
      },
      "date": "2002-11-18T15:56:33+00:00",
      "subject": "RE: (urth) FTL Travel",
      "in_reply_to": null,
      "reply_link": null,
      "blocks": [
        {
          "kind": "text",
          "depth": 0,
          "text": "Don asks:\nPlease explain.  Is this the usual SF take on FTL or is there a physics\nexplanation that makes backward time travel the most likely?  I'm pretty\nignorant on this.\n\nCrush responds:\nAs one moves faster and approaches the speed of light, time slows down,\nexponentially, until time stops at the speed of light. I am informed by\nStephen Hawking (not personally) that it takes an infinite amount of time\nand an infinite amount of energy to reach the speed of light.\n\nIt is simple mathematics that as one moves faster than the speed of light,\ntime moves in the opposite direction. No doubt, there are other mathematical\nmodels.\n\nHence, a FTL generation ship is unnecessary.\n\n-- Crush"
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2155@digest.urth.net>",
      "from": {
        "name": "Roy C. Lackey",
        "address": "rclackey at stic.net"
      },
      "date": "2002-11-18T19:09:35+00:00",
      "subject": "Re: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2148@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "quote",
          "depth": 1,
          "text": "Crush quoted and wrote:\nDon asks:\nPlease explain.  Is this the usual SF take on FTL or is there a physics\nexplanation that makes backward time travel the most likely?  I'm pretty\nignorant on this.\n\nCrush responds:\nAs one moves faster and approaches the speed of light, time slows down,\nexponentially, until time stops at the speed of light. I am informed by\nStephen Hawking (not personally) that it takes an infinite amount of time\nand an infinite amount of energy to reach the speed of light.\n\nIt is simple mathematics that as one moves faster than the speed of light,\ntime moves in the opposite direction. No doubt, there are other\nmathematical\nmodels.\n\nHence, a FTL generation ship is unnecessary."
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "Thanks for taking the question. I would only add that, in the wake of\nEinstein's (and other's) theories, such theoretical considerations spawned\nsomeone to pen a limerick several generation ago. (From memory.)\n\n\"There was a young lady named Bright,\nwho traveled far faster than light.\nShe set out one day,\nin a Relative way,\nand returned home the previous night.\"\n\n-Roy"
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2159@digest.urth.net>",
      "from": {
        "name": "Andy Robertson",
        "address": "andywrobertson at clara.co.uk"
      },
      "date": "2002-11-18T19:48:49+00:00",
      "subject": "Re: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2155@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "text",
          "depth": 0,
          "text": "This is not quite accurate.\n\nWhat is accurate is that travelling FTL in one inertial frame, from the\npoint of view of one observer,  will **always** be travelling back in time\nin another inertial frame, from the point of view of another observer.\n\nGod may see the universe as a four-dimensional whole, as has been discussed.\n\nTravelling FTL requires that you have the vision of God - that you see time,\nnot as a progression, but as a dimension\n\n\n\n\n----- Original Message -----"
        },
        {
          "kind": "quote",
          "depth": 1,
          "text": "From: \"Roy C. Lackey\" <rclackey at stic.net>\nTo: \"urth\" <urth at urth.net>\nSent: Monday, November 18, 2002 7:09 PM\nSubject: Re: (urth) FTL Travel\nCrush quoted and wrote:"
        },
        {
          "kind": "quote",
          "depth": 2,
          "text": "Don asks:\nPlease explain.  Is this the usual SF take on FTL or is there a physics\nexplanation that makes backward time travel the most likely?  I'm pretty\nignorant on this.\n\nCrush responds:\nAs one moves faster and approaches the speed of light, time slows down,\nexponentially, until time stops at the speed of light. I am informed by\nStephen Hawking (not personally) that it takes an infinite amount of time\nand an infinite amount of energy to reach the speed of light.\n\nIt is simple mathematics that as one moves faster than the speed of\nlight,\ntime moves in the opposite direction. No doubt, there are other\nmathematical\nmodels.\n\nHence, a FTL generation ship is unnecessary."
        },
        {
          "kind": "quote",
          "depth": 1,
          "text": "Thanks for taking the question. I would only add that, in the wake of\nEinstein's (and other's) theories, such theoretical considerations spawned\nsomeone to pen a limerick several generation ago. (From memory.)\n\n\"There was a young lady named Bright,\nwho traveled far faster than light.\nShe set out one day,\nin a Relative way,\nand returned home the previous night.\"\n\n-Roy\n\n\n--"
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2164@digest.urth.net>",
      "from": {
        "name": "James Wynn",
        "address": "crushtv at hotpop.com"
      },
      "date": "2002-11-18T20:10:08+00:00",
      "subject": "RE: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2159@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "text",
          "depth": 0,
          "text": "Nicely done, but place our explanations side by side and I think you can see\nwhy I explained it the way I did <g>.\n\n-- Crush\n\n-----Original Message-----\nFrom: Andy Robertson [mailto:andywrobertson at clara.co.uk]\nSent: Monday, November 18, 2002 1:49 PM\nTo: urth at urth.net\nSubject: Re: (urth) FTL Travel\n\nThis is not quite accurate.\n\nWhat is accurate is that travelling FTL in one inertial frame, from the\npoint of view of one observer,  will **always** be travelling back in time\nin another inertial frame, from the point of view of another observer.\n\nGod may see the universe as a four-dimensional whole, as has been discussed.\n\nTravelling FTL requires that you have the vision of God - that you see time,\nnot as a progression, but as a dimension\n\n\n\n\n----- Original Message -----"
        },
        {
          "kind": "quote",
          "depth": 1,
          "text": "From: \"Roy C. Lackey\" <rclackey at stic.net>\nTo: \"urth\" <urth at urth.net>\nSent: Monday, November 18, 2002 7:09 PM\nSubject: Re: (urth) FTL Travel\nCrush quoted and wrote:"
        },
        {
          "kind": "quote",
          "depth": 2,
          "text": "Don asks:\nPlease explain.  Is this the usual SF take on FTL or is there a physics\nexplanation that makes backward time travel the most likely?  I'm pretty\nignorant on this.\n\nCrush responds:\nAs one moves faster and approaches the speed of light, time slows down,\nexponentially, until time stops at the speed of light. I am informed by\nStephen Hawking (not personally) that it takes an infinite amount of time\nand an infinite amount of energy to reach the speed of light.\n\nIt is simple mathematics that as one moves faster than the speed of\nlight,\ntime moves in the opposite direction. No doubt, there are other\nmathematical\nmodels.\n\nHence, a FTL generation ship is unnecessary."
        },
        {
          "kind": "quote",
          "depth": 1,
          "text": "Thanks for taking the question. I would only add that, in the wake of\nEinstein's (and other's) theories, such theoretical considerations spawned\nsomeone to pen a limerick several generation ago. (From memory.)\n\n\"There was a young lady named Bright,\nwho traveled far faster than light.\nShe set out one day,\nin a Relative way,\nand returned home the previous night.\"\n\n-Roy\n\n\n--"
        },
        {
          "kind": "sig",
          "depth": 0,
          "text": "-- "
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2165@digest.urth.net>",
      "from": {
        "name": "cilluff1 at optonline.net",
        "address": "cilluff1 at optonline.net"
      },
      "date": "2002-11-18T20:14:53+00:00",
      "subject": "Re: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2164@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "text",
          "depth": 0,
          "text": "Andy wrote:\n\n<<<\n<<Travelling FTL requires that you have the vision of God - that you see\ntime,\nnot as a progression, but as a dimension >>>\n\nAlthough I do not pretend to be versed in the mathematics of FTL travel (I\nwas an English lit. major way back when, no hard science!), I'm not sure I\nagree with this assertion, or at least I would be interested, as a layman,\nin a little more explanation as to why FTL travel would require the\ntraveller to have the vision of God (which was eloquently put, btw).  After\nall, we who can move voluntarily only in three dimensions may not be able\nto perceive all three (for example, someone blind in one eye may have poor\ndepth perception, or for that matter, someone blind in both eyes would not\nbe able to perceive any, but he still travels in three dimensions).  As a\nlayman I would really be interested to hear more of your reasoning.\n\n- Joe"
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2169@digest.urth.net>",
      "from": {
        "name": "Andy Robertson",
        "address": "andywrobertson at clara.co.uk"
      },
      "date": "2002-11-18T20:32:36+00:00",
      "subject": "Re: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2165@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "text",
          "depth": 0,
          "text": "Shoot, I'd have to do the maths: and there is an end to all civility.\n\n\n\nI think it is quite clear that Wolfe shows FTL travel to be a doorway to a\ndivine realm.   Consider the Ship, the corridors of time, the mirrors.\n\nAnd yes, I do believe Wolfe is **intentionally** conflating the\nGd-outside-time of the Catholic Boethius with the time-as-fourth-dimension\nof the relativistic Physicist.\n\nModern theoretical Physics is after all descended from Theology:  Her\nbastard with the Blacksmith Hephaestos/Technology..\n\n\n\n\n\n\n\n----- Original Message -----\nFrom: <cilluff1 at optonline.net>\nAlthough I do not pretend to be versed in the mathematics of FTL travel (I\nwas an English lit. major way back when, no hard science!), I'm not sure I\nagree with this assertion, or at least I would be interested, as a layman,\nin a little more explanation as to why FTL travel would require the\ntraveller to have the vision of God (which was eloquently put, btw).  After\nall, we who can move voluntarily only in three dimensions may not be able\nto perceive all three (for example, someone blind in one eye may have poor\ndepth perception, or for that matter, someone blind in both eyes would not\nbe able to perceive any, but he still travels in three dimensions).  As a\nlayman I would really be interested to hear more of your reasoning.\n\n- Joe"
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2170@digest.urth.net>",
      "from": {
        "name": "Josh Geller",
        "address": "dclxvi at dclxvi.best.vwh.net"
      },
      "date": "2002-11-18T21:06:38+00:00",
      "subject": "Re: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2169@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "quote",
          "depth": 1,
          "text": "On Mon, 18 Nov 2002, Andy Robertson wrote:\nShoot, I'd have to do the maths: and there is an end to all civility."
        },
        {
          "kind": "quote",
          "depth": 1,
          "text": "I think it is quite clear that Wolfe shows FTL travel to be a doorway to a\ndivine realm.   Consider the Ship, the corridors of time, the mirrors."
        },
        {
          "kind": "quote",
          "depth": 1,
          "text": "And yes, I do believe Wolfe is **intentionally** conflating the\nGd-outside-time of the Catholic Boethius with the time-as-fourth-dimension\nof the relativistic Physicist."
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "The idea of time as a dimension is much older than Boethius and very\nwidespread."
        },
        {
          "kind": "quote",
          "depth": 1,
          "text": "Modern theoretical Physics is after all descended from Theology:  Her\nbastard with the Blacksmith Hephaestos/Technology.."
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "These are all recent developments, Aquinas, Aristotle, all of it.\n\nYou find 'advanced' ideas about time among indigenous Africans, Americans,\nAustralians, Polynesians and 'heathen' Europeans, as well as in ancient\nMiddle-Eastern and Indian books.\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n."
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2171@digest.urth.net>",
      "from": {
        "name": "Andy Robertson",
        "address": "andywrobertson at clara.co.uk"
      },
      "date": "2002-11-18T21:28:29+00:00",
      "subject": "Re: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2170@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "text",
          "depth": 0,
          "text": "----- Original Message -----"
        },
        {
          "kind": "quote",
          "depth": 1,
          "text": "From: \"Josh Geller\" <dclxvi at dclxvi.best.vwh.net>"
        },
        {
          "kind": "quote",
          "depth": 2,
          "text": "I think it is quite clear that Wolfe shows FTL travel to be a doorway to\na\ndivine realm.   Consider the Ship, the corridors of time, the mirrors."
        },
        {
          "kind": "quote",
          "depth": 2,
          "text": "And yes, I do believe Wolfe is **intentionally** conflating the\nGd-outside-time of the Catholic Boethius with the\ntime-as-fourth-dimension\nof the relativistic Physicist."
        },
        {
          "kind": "quote",
          "depth": 1,
          "text": "The idea of time as a dimension is much older than Boethius and very\nwidespread."
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "Possibly, and what of it?\n\nI'd bet any amount that it is the Catholic sources that Wolfe is drawing\nfrom.\n\nAnd modern theoretical physics IS descended from medaeval Catholic theology.\nOn the wrong side of the blankets.   Maybe some other brat in some other\nland could have squalled the same song, but that is this one's mothering and\nsuckling.\n\n\n    hartshorn"
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2177@digest.urth.net>",
      "from": {
        "name": "Don Doggett",
        "address": "harlekin at earthlink.net"
      },
      "date": "2002-11-19T07:28:41+00:00",
      "subject": "Re: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2171@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "text",
          "depth": 0,
          "text": "----- Original Message -----"
        },
        {
          "kind": "quote",
          "depth": 1,
          "text": "From: \"Andy Robertson\" <andywrobertson at clara.co.uk>\nI think it is quite clear that Wolfe shows FTL travel to be a doorway to a\ndivine realm.   Consider the Ship, the corridors of time, the mirrors.\n\nAnd yes, I do believe Wolfe is **intentionally** conflating the\nGd-outside-time of the Catholic Boethius with the time-as-fourth-dimension\nof the relativistic Physicist."
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "This dovetails nicely with the idea of Silk's enlightenment and the Whorl's\n(alleged by me) FTL travel happening simultaneously.\n\nDon"
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2195@digest.urth.net>",
      "from": {
        "name": "Jerry Friedman",
        "address": "jerry_friedman at yahoo.com"
      },
      "date": "2002-11-19T22:28:47+00:00",
      "subject": "RE: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2177@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "quote",
          "depth": 1,
          "text": "--- James Wynn <crushtv at HotPOP.com> wrote:\nNicely done, but place our explanations side by side and I think you can\nsee\nwhy I explained it the way I did <g>.\n\n-- Crush\n\n-----Original Message-----\nFrom: Andy Robertson [mailto:andywrobertson at clara.co.uk]\nSent: Monday, November 18, 2002 1:49 PM\nTo: urth at urth.net\nSubject: Re: (urth) FTL Travel\n\nThis is not quite accurate.\n\nWhat is accurate is that travelling FTL in one inertial frame, from the\npoint of view of one observer,  will **always** be travelling back in\ntime\nin another inertial frame, from the point of view of another observer.\n\nGod may see the universe as a four-dimensional whole, as has been\ndiscussed.\n\nTravelling FTL requires that you have the vision of God - that you see\ntime,\nnot as a progression, but as a dimension\n\n\n\n\n----- Original Message -----\nFrom: \"Roy C. Lackey\" <rclackey at stic.net>\nTo: \"urth\" <urth at urth.net>\nSent: Monday, November 18, 2002 7:09 PM\nSubject: Re: (urth) FTL Travel"
        },
        {
          "kind": "quote",
          "depth": 2,
          "text": "Crush quoted and wrote:"
        },
        {
          "kind": "quote",
          "depth": 3,
          "text": "Don asks:\nPlease explain.  Is this the usual SF take on FTL or is there a\nphysics\nexplanation that makes backward time travel the most likely?  I'm\npretty\nignorant on this.\n\nCrush responds:\nAs one moves faster and approaches the speed of light, time slows\ndown,\nexponentially, until time stops at the speed of light. I am informed\nby\nStephen Hawking (not personally) that it takes an infinite amount of\ntime\nand an infinite amount of energy to reach the speed of light."
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "\"...that it *would* take...\"?"
        },
        {
          "kind": "quote",
          "depth": 3,
          "text": "It is simple mathematics that as one moves faster than the speed of\nlight,\ntime moves in the opposite direction. No doubt, there are other\nmathematical\nmodels."
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "I wouldn't call it simple mathematics.  What Andy Robertson is\ntalking about is that if observers moving with some velocities see\nan object move from A to B faster than light, then all observers\nwith other velocities see the object move from B to A faster than\nlight.  You can use this fact to show if FTL travel or even\ncommunication is possible, you can send messages to your own past.\nThis doesn't say anything about what would be experienced by\nsomeone traveling faster than light, if such a thing is (were)\npossible.  I think it probably isn't possible, and if it is, no one\nhas the slightest idea what someone traveling FTL would experience.\n\nIn reality, sending messages backward in time is often cited as a\nrefutation of FTL, a reductio ad absurdum.  In Wolfe's fiction,\ntime travel is possible already, so FTL is no problem.  Severian\nmakes this connection, by the way--it must be near the end of\n_Citadel_, after the secret of the universe."
        },
        {
          "kind": "quote",
          "depth": 3,
          "text": "Hence, a FTL generation ship is unnecessary."
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "...\n\nThat one I agree with (with an exception that's probably unimportant\nto BotLS).  I see no evidence at all that the _Whorl_ is capable of\nFTL.  I agree with Andy Robertson that Wolfe associates FTL with\ntranscendence, and would add that the _Whorl_ seems to be entirely\nsecular.  (I don't think I'm the first person to say that on the list.)\n\nJerry Friedman"
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2199@digest.urth.net>",
      "from": {
        "name": "James Wynn",
        "address": "crushtv at hotpop.com"
      },
      "date": "2002-11-20T00:14:54+00:00",
      "subject": "RE: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2195@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "text",
          "depth": 0,
          "text": "Don asked:\nPlease explain.  Is this the usual SF take on FTL or is there a physics\nexplanation that makes backward time travel the most likely?  I'm pretty\nignorant on this.\n\nCrush does his best to help:\nAs one moves faster and approaches the speed of light, time slows down,\nexponentially, until time stops at the speed of light. I am informed by\nStephen Hawking (not personally) *that it takes* an infinite amount of time\nand an infinite amount of energy to reach the speed of light.\n\nJerry Friedman asks facetiously:\n\"...that it *would* take...\"?\n\nCrush explains to Mr. Friedman:\nWhy no. Everyone knows that Hawkings has a FTL wheelchair. ;-)\nNit. nit. nit.<g>\n\n\nCrush goes on responding to Don's question:\nIt is simple mathematics that as one moves faster than the speed of light,\ntime moves in the opposite direction.\n\nJerry Friedman bristles at this bowdlerization of the theory of Relativity:\nI wouldn't call it simple mathematics.\n\nCrush responds to Jerry Friedman:\nNeither would I, as my response to Hartshorn was intended to convey. But the\ngeneral concept of why a *possible* implication of FTL travel is that one\nwould move into his own past is one of the most straightforward concepts in\nthis realm. I believe Don's question was whether or not all this had the\nscientific pedigree of dililthium crystals. I don't think my answer was\nmisleading given the context.\n\nYou have heroically attempted to clarify Hartshorn's beautiful explanation,\nbut I've got a dollar that says that a majority of the readers of this\nlist -- still - have no more than the vaguest understanding of what you are\ndescribing or its implications (unless a majority of the people on this have\na B.A. in Physics).\n\nRemember Kypris explaining possession to Silk?\n\n-- Crush"
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2201@digest.urth.net>",
      "from": {
        "name": "James Wynn",
        "address": "crushtv at hotpop.com"
      },
      "date": "2002-11-20T15:15:27+00:00",
      "subject": "RE: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2199@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "text",
          "depth": 0,
          "text": "Crush said:\n...unless a majority of the people on this have\na B.A. in Physics\n\nCrush reconsiders:\nA *B.A.* in Physics is what I might have but, of course, most people get a\nB.S."
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2202@digest.urth.net>",
      "from": {
        "name": "Andy Robertson",
        "address": "andywrobertson at clara.co.uk"
      },
      "date": "2002-11-20T15:38:33+00:00",
      "subject": "Re: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2201@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "text",
          "depth": 0,
          "text": "I have  BA in Physics.  You get a BA in Physics unless you go to One Of\nThose Other Universities.\n\n\n----- Original Message -----"
        },
        {
          "kind": "quote",
          "depth": 1,
          "text": "From: \"James Wynn\" <crushtv at HotPOP.com>\nTo: <urth at urth.net>\nSent: Wednesday, November 20, 2002 3:15 PM\nSubject: RE: (urth) FTL Travel\n\nCrush said:\n...unless a majority of the people on this have\na B.A. in Physics\n\nCrush reconsiders:\nA *B.A.* in Physics is what I might have but, of course, most people get a\nB.S.\n\n\n\n\n--"
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2203@digest.urth.net>",
      "from": {
        "name": "Gareth Jelley",
        "address": "gjelley at btopenworld.com"
      },
      "date": "2002-11-20T16:57:34+00:00",
      "subject": "Re: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2202@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "quote",
          "depth": 1,
          "text": "I have  BA in Physics.  You get a BA in Physics unless you go to One Of\nThose Other Universities."
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "Ha!\n\nGareth,\n\nBA in English from The University of..."
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2204@digest.urth.net>",
      "from": {
        "name": "Jerry Friedman",
        "address": "jerry_friedman at yahoo.com"
      },
      "date": "2002-11-20T18:37:40+00:00",
      "subject": "RE: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2203@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "text",
          "depth": 0,
          "text": "--- James Wynn <crushtv at HotPOP.com> wrote:\n..."
        },
        {
          "kind": "quote",
          "depth": 1,
          "text": "Jerry Friedman bristles at this bowdlerization of the theory of\nRelativity:\nI wouldn't call it simple mathematics.\n\nCrush responds to Jerry Friedman:\nNeither would I, as my response to Hartshorn was intended to convey. But\nthe\ngeneral concept of why a *possible* implication of FTL travel is that\none\nwould move into his own past is one of the most straightforward concepts\nin\nthis realm. I believe Don's question was whether or not all this had the\nscientific pedigree of dililthium crystals. I don't think my answer was\nmisleading given the context."
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "I think it was.  I had the impression that people who didn't know\nphysics were gathering that FTL means time going backwards, either\nvisiting your past or \"watching the movie in reverse\".  There's no\nreason to expect that, though I guess if FTL turns out to be possible,\nthat could be what happens.\n\n(Also, the \"simple mathematics\", taking the Lorentz factor literally\nwith a speed greater than c, gives you imaginary time--with a square\nroot of -1--not negative time.  Whatever either of those would mean.)"
        },
        {
          "kind": "quote",
          "depth": 1,
          "text": "You have heroically attempted to clarify Hartshorn's beautiful\nexplanation,\nbut I've got a dollar that says that a majority of the readers of this\nlist -- still - have no more than the vaguest understanding of what you\nare\ndescribing or its implications (unless a majority of the people on this\nhave\na B.A. in Physics)."
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "I'm not taking your bet.\n\nAs you seem to know, explaining the part about sending a message to\nyour past takes only high-school level algebra (square roots), but\nthis isn't the place.  I was just trying to keep people from getting\nfalse impressions.  I don't think I did that very clearly."
        },
        {
          "kind": "quote",
          "depth": 1,
          "text": "Remember Kypris explaining possession to Silk?"
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "And I'm not even pretty.\n\nJerry Friedman"
        }
      ]
    },
    {
      "message_id": "<urth-v0211-2205@digest.urth.net>",
      "from": {
        "name": "James Wynn",
        "address": "crushtv at hotpop.com"
      },
      "date": "2002-11-20T20:56:11+00:00",
      "subject": "RE: (urth) FTL Travel",
      "in_reply_to": "<urth-v0211-2204@digest.urth.net>",
      "reply_link": "subject",
      "blocks": [
        {
          "kind": "text",
          "depth": 0,
          "text": "Jerry Friedman (J.F.) persists:\nI think [Crush's explanation] was [misleading].  I had the impression that\npeople who didn't know\nphysics were gathering that FTL means time going backwards, either\nvisiting your past or \"watching the movie in reverse\".  There's no\nreason to expect that, though I guess if FTL turns out to be possible,\nthat could be what happens.\n\n(Also, the \"simple mathematics\", taking the Lorentz factor literally\nwith a speed greater than c, gives you imaginary time--with a square\nroot of -1--not negative time.  Whatever either of those would mean.)\n\nCrush concedes:\nWell, if you say that that 90 years of popular scientific articles and\nNova/Discovery Channel documentaries are whacked in asserting that FTL speed\nis a likely method of backward time travel (presuming FTL travel is not an\nabsurdity), then I'm in no position to dispute it. I capitulate to your\nevident exceeding technical expertise (I had to take college algebra twice).\n\nJ.F, coyly self-effaced:"
        },
        {
          "kind": "quote",
          "depth": 3,
          "text": "Remember Kypris explaining possession to Silk?<<<"
        },
        {
          "kind": "text",
          "depth": 0,
          "text": "And I'm not even pretty.\n\nCrush toasts:\nI don't know about that. You have lovely posts.\n<J.F. socks Crush in the eye>"
        }
      ]
    }
  ]
}