December 5th, 2017, 11:15 AM  #1 
Newbie Joined: Dec 2017 From: India Posts: 13 Thanks: 0  Solution for the grandfather paradox — What will happen if a person goes back in time and kills his grandfather before the grandfather was married? This question creates a paradox because if the person eliminates his grandfather then he will not exist in the first place to eliminate his grandfather, and if the person did not exist then the grandfather was eliminated by none, if this is the case, the person will exist to eliminate his grandfather and thus we are back to the same square. Before I present my hypothesis about the solution of grandfather paradox, I would like to make two new terms 
First, we will mark the K in which the person landed in past to eliminate his grandfather as a, the K in which he went to the past as b, the S of the person as o, and the S of the person in the past as if he belongs to the past as i. Now, when the person lands in a his i starts advancing and the S one K ago from a (will be marked as l) comes to a and transforms it like artificial interference from the future never happened. The person will eliminate his grandfather and will return to o, and in o, there will be no change at all. When l is in a, the S one K ago from b comes in b, time travel occurs again, resulting the K in which l is in to be interfered from the future. This process repeats until l reaches one K ago from b, and when the l reaches b, a doesn't get changed again due to interference from the future. Thus, there is a time period between a + 1 K to b. When the time period travels through the timeline, the K's that fall within it has an existence as if grandfather was eliminated, and the timeline exclusion (from a) that doesn't fall within that time period has an existence without the elimination of grandfather. When this time period will have passed through b completely, the process of interference will start again, a similar timeline will be formed, and the overall process will repeat infinitely until somebody or something interferes in this process. Reference https://www.physicsforums.com/thread...hanics.933327/ Last edited by skipjack; February 20th, 2018 at 11:34 PM. 
December 5th, 2017, 05:16 PM  #2 
Senior Member Joined: May 2016 From: USA Posts: 1,306 Thanks: 549 
If A is true, then B is true and B is not true implies that A is false. There is NO paradox.

December 6th, 2017, 12:35 AM  #3  
Senior Member Joined: Jun 2015 From: England Posts: 891 Thanks: 269  Quote:
The phrase "there exists" or "there is" has quite a different meaning in Mathematics (including Logic) from its meaning in Physics. You can't combine the separate meanings to form a (logical) paradox. Mathematics disregards time, so when we assert in Mathematics There exists or there is a number we call 3 it doesn't matter whether we are talking about 5000 BC or 5000 AD or today or any other when.  
December 6th, 2017, 11:41 AM  #4 
Newbie Joined: Dec 2017 From: India Posts: 13 Thanks: 0  
December 6th, 2017, 11:41 AM  #5  
Newbie Joined: Dec 2017 From: India Posts: 13 Thanks: 0  Quote:
 
December 6th, 2017, 11:42 AM  #6 
Newbie Joined: Dec 2017 From: India Posts: 13 Thanks: 0  
December 6th, 2017, 01:22 PM  #7 
Senior Member Joined: Jun 2014 From: USA Posts: 479 Thanks: 36 
Ever play the original Final Fantasy for Nintendo? I'm pretty sure they solved the paradox in that. https://www.gamefaqs.com/boards/6058...ntasy/58570310 
December 6th, 2017, 01:40 PM  #8 
Senior Member Joined: May 2016 From: USA Posts: 1,306 Thanks: 549  A = "a person went back in time and killed his grandfather when the grandfather was 2 years old." B = "the person who went back in time was born." not B = "the person who went back in time was not born." If A is true, the person who went back in time and killed his grandfather while the grandfather was incapable of fathering anyone must have been alive and so was born. If A is true, the person who went back in time and killed his grandfather while the grandfather was incapable of fathering anyone could never have been born and so was not born. If A is true, B is true and not B is true. Therefore A is false. There is no paradox. 
December 7th, 2017, 12:24 AM  #9 
Senior Member Joined: Apr 2014 From: UK Posts: 895 Thanks: 328 
That implies the only way to avoid a paradox is if going back in time isn't possible.

December 7th, 2017, 12:50 AM  #10 
Senior Member Joined: Nov 2011 Posts: 248 Thanks: 3 
Decart said: "If I think, I alive"; also, if you kill your father/grandfather in preteen years.


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grandfather, hypothesis, paradox, solution 
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