Originally posted by Sullen Jester
I skipped the bulk of this thread, just so I could say this.
The concept of time travel is unworkable. Even if you had a fully working, fully functioning, 'time machine', you would just be stuck in a loop.
Example #1.
You build a time machine.
There is one guy at work, who really, really, REALLY annoys you. So you get your time machine, go back in time 100 years and kill his grand parents.
Great, so they're dead, and he never existed.
BUT, if he never existed, you never went back in time and killed his grand parents.
So his great-grand parents lived on, had a happy life, and gave birth to children. And so forth. He is born again.
BUT, since he was born, you DO go back in time and kill his grand parents.
BUT, since they are dead, they never gave birth to him. Therefore, you didnt go back in time and killed them.
See what I mean?