grandfather paradox love

grandfather paradox


from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The paradox of time travel that hypothetically occurs when one person goes back to the past and kills their biological grandfather before the latter fathered the traveller's father, thus, by extension, preventing the traveller to ever be conceived in the first place.
  • n. An instance of the grandfather paradox.


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  • Martha: It's like in the films! You step on a butterfly, you change the future of the human race!

    The Doctor: (Bemused) I'll tell you what then, don't.... step on any butterflies. What have butterflies ever done to you?

    Martha: What if.... I dunno! What if I kill my grandfather?!

    The Doctor: Are you planning to?

    Martha: No.

    The Doctor: Well, then.

    Doctor Who, The Shakespeare Code (2007).

    October 7, 2008