December 5th, 2017, 11:15 AM  #1 
Newbie Joined: Dec 2017 From: India Posts: 13 Thanks: 0  Grandfather paradox solution hypothesis 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 
Reference https://www.physicsforums.com/thread...hanics.933327/ 
December 5th, 2017, 05:16 PM  #2 
Senior Member Joined: May 2016 From: USA Posts: 857 Thanks: 348 
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: 704 Thanks: 202  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, 07:17 AM  #4 
Newbie Joined: Dec 2017 From: USA Posts: 3 Thanks: 2 Math Focus: History of MAth 
Decide how do you want to solve the paradox, from the point of view of physics, math or logic. The solution may be different according to different scientific point of view.

December 6th, 2017, 11:41 AM  #5 
Newbie Joined: Dec 2017 From: India Posts: 13 Thanks: 0  
December 6th, 2017, 11:41 AM  #6  
Newbie Joined: Dec 2017 From: India Posts: 13 Thanks: 0  Quote:
 
December 6th, 2017, 11:42 AM  #7 
Newbie Joined: Dec 2017 From: India Posts: 13 Thanks: 0  
December 6th, 2017, 01:22 PM  #8 
Senior Member Joined: Jun 2014 From: USA Posts: 316 Thanks: 22 
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  #9 
Senior Member Joined: May 2016 From: USA Posts: 857 Thanks: 348  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  #10 
Senior Member Joined: Apr 2014 From: UK Posts: 786 Thanks: 294 
That implies the only way to avoid a paradox is if going back in time isn't possible.


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