Is time travel really possible?

In summary: The problem is that both sides think they're right. And since you're all intelligent people, it's hard for you to imagine that someone could disagree with you when you're right. So you all think that the other people are just wrong and don't understand the issue.But you're all right and you all understand the issue. The problem is that you're all thinking about different things.The people who say time travel is impossible (or possible) are thinking about one thing. The people who say time travel is possible (or impossible) are thinking about something else. The problem is that you're all trying to answer the same question, but you're thinking about two different things. So you're ending up with two different answers.
  • #71
4)If it were possible to travel in time, THERE WOULD BE time travellers all over the place. Because there are not that means either every sentient being is afraid of time travel to do it, or because it is impossible to begin with anyways.

Perhaps humans don't survive as a species long enough to learn time travel. Maybe there's intelligent life elsewhere in the universe that has discovered a method of time travel, and has simply has not visited this neck of the universe.
 
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  • #72
Time travel violates causality. Not to mention that law that forbids creating or destroying matter and energy. If you 'left' this universe you would be in violation. The only way to pull off that crime would be to hide enough 'negative' energy in your suitcase to exactly offset the positive energy you stole. Probably be hard to smuggle that through customs.
 
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