# Why the “grandfather” paradox - time travel related **URL:** \ **Category:** Factual Questions\ **Created:** [August 29, 2018, 5:22am UTC](https://boards.straightdope.com/t/why-the-grandfather-paradox-time-travel-related/820452 "2018-08-29T05:22:48Z")\ **Posts on this page:** 2\ **Page:** 3
**Author:** ![CaptMurdock](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/captmurdock/32/11736_2.png) [@CaptMurdock](https://boards.straightdope.com/u/CaptMurdock)\ **Post date:** [August 30, 2018, 6:12pm UTC](https://boards.straightdope.com/t/why-the-grandfather-paradox-time-travel-related/820452/41 "2018-08-30T18:12:47Z")
> [@Machine\_Elf](#): > > It’s worth noting that [Stephen Hawking once held a party for time travelers from the future,](https://www.washingtonpost.com/news/speaking-of-science/wp/2018/03/14/the-time-travelers-party/?utm_term=.bc0db8f2f56f) but nobody showed up. You mean “yet.” Give it time. 🆒 > [@Smapti](#): > > I refer you to the case of Philip J. Fry, who managed to both kill and _become_ his own grandfather. 😃 An example of the Pogo Paradox. “We have met the enemy, and they is us!” ---
**Author:** ![CalMeacham](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/calmeacham/32/35_2.png) [@CalMeacham](https://boards.straightdope.com/u/CalMeacham)\ **Post date:** [August 31, 2018, 2:55am UTC](https://boards.straightdope.com/t/why-the-grandfather-paradox-time-travel-related/820452/42 "2018-08-31T02:55:34Z")
Of course. I have to post my several-times-repeated sig line, which I originally used back around 2000: > [@](#): > > “Of course,” said my grandfather, pulling a gun from his belt as he stepped from the Time Machine, “There’s no paradox if _I_ shoot _you_.” [Previous page](https://boards.straightdope.com/t/why-the-grandfather-paradox-time-travel-related/820452.md?page=2)