What is grandfather paradox?

Mind blowing blather!

I love the M.C. Escher picture they used😎

ZyggyStardust, Change your news channel Zyg, we did not have 8 years of economic decline. However, we have experienced the last 3 years of moral decline.

Check out Stephen Hawking's birthday invitations. You're going to love it.

jblum315, what's unbelievable is that 40% of people don't understand how insane he is

Time... who can explain it? Every time you think you can, you can't. some say motion or change... but that takes time.

very confusing but good to know.

Futurama did a great episode on this. Literally.

FreshMango, oh, good grief!

Player #9931356, here's the paradox jblums comment has been removed ergo no one knows what your talking about

Leebo13, WHAT? :😀

The Umbrella Academy S3

The definition of the word "paradox" is something that defies logic. What defies logic in this case is that someone can travel in time.

Mick Jagger has a great grandchild who is older than his youngest child.

Here's the problem with this "paradox" thing: For lack of a more accurate description, let's call it "reality/truth". That is, a fact that is unchanged NO MATTER what anyone/everyone believes. For example, the existence of God. It doesn't matter what anyone/everyone believes, the truth of the matter will remain unchanged. The same is true for the Grandfather paradox. IF the Grandfather exists in any way at all to begin with, nothing will change that. For example, the Grandson who went back in time for the purpose of killing said Grandfather will instead be prevented from committing the act of ending the Grandfather's life.

jblum315, migrate to New Zealand

jblum315, You are not intellectually honest. And all you are doing by saying President Trump is insane is being divicive. Vote him out if want someone else.....but he was ELECTED into office.