Results 1 to 8 of 8
Like Tree3Likes
  • 3 Post By Javaphile

Thread: Time travel 'Grandfather Paradox' solved?

  1. #1
    Super Moderator Javaphile's Avatar
    Join Date
    Dec 2004
    Location
    Earth!
    Posts
    13,446

    Time travel 'Grandfather Paradox' solved?

    Perhaps time travel isn't as impossible as has been thought: https://cosmosmagazine.com/physics/c...travel-problem


    Java "Don't ya love logic?!?" phile
    Dimal, Magic_Matt and noonar like this.
    Toys! I must have new toys!!!

  2. #2
    Senior Member noonar's Avatar
    Join Date
    Aug 2013
    Location
    MortalCoil
    Posts
    179
    Great read that one Java, the boundless arguments about the simulation hypothesis and similar theories were re-invigorated by this research. It's a real mind bender when digging deeper.

  3. #3
    Senior Member
    Join Date
    Aug 2015
    Location
    Perth WA
    Posts
    460
    The first solution (Marty having sex with own grandmother) isn't possible because the offspring will need to maintain the entire set of genes from the father (ie Marty) and not a combination of genes from both the parents which is impossible.

    I couldn't be arsed understanding the 2nd solution.

  4. #4
    Senior Member noonar's Avatar
    Join Date
    Aug 2013
    Location
    MortalCoil
    Posts
    179
    If we are/were able to time travel, gene manipulation via whatever method (CRSIPR for instance) even "on the fly" what be accounted for surely?

  5. #5
    Senior Member
    Join Date
    Aug 2015
    Location
    Perth WA
    Posts
    460
    If genes manipulation existed then there would be no need to recreate Marty biologically as gene manipulation could be used to create him.

    As the paradox is based on biological reproduction, the paradox itself is no longer valid.

  6. #6
    Senior Member
    Join Date
    Aug 2013
    Location
    Rockingham W.A.
    Posts
    806
    Heinlein's "All you Zombies" remains the ultimate time travel paradox for me. Right up there with "Let there be light" - either Asimov's "Last Question" or the religious original. Oh, and none of those needed a computer to work out the logic.

    Pity about the butchered film they did of Heinlein's effort.

  7. #7
    Senior Member noonar's Avatar
    Join Date
    Aug 2013
    Location
    MortalCoil
    Posts
    179
    I am not completely familiar with the golden age of science fiction's theories on the subject Tampit. The pertinent phrase and caveat in the article is "causal gymnastics" which I assume is referring to control theory - another mind boggler.

  8. #8
    Senior Member Rocky's Avatar
    Join Date
    May 2008
    Location
    Central Queensland
    Posts
    747
    Ah, Asimov. I read most of his works in my teens/twenties and I remember that particular short story because of the wonderful ending that brought a smile to me today, just as it did more than forty years ago.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •