Dr. Arnold Mayer:
[
Addressing a lecture hall audience, possibly at the United Nations] It's a far cry from saying that objects can travel through time to saying that people can. Why? For one thing, paradoxes can occur. Say you build a time machine, go backwards in time and murder your father when he was ten years old. That means you were never born. And if you were never born, how did you build the time machine? Paradox! It's the possibility of wiping out your own existence that makes most people rule out time-travel. Still, why not? If you were careful, you could do it. A time-traveler would have to be extremely cautious, but he could do a surprising number of things. He could observe, for one. Time-travelers would know the answers to a thousand questions that have puzzled historians for generations. For example: who was on the grassy knoll that day in Dallas? He could also take things, provided they wouldn't be missed: a cup of water from the Pacific Ocean, a stone from the Grand Canyon... This may sound pointless, but sometimes the difference between a dead man and a man who's alive can be very small. Now, how about the difference between a man who's about to die, and a man no one will ever see again? You see, this is the difficult thing about looking for time-travelers: they don't want to be found! You must look for them in places where people do not normally go. Or, where there are people that no one will ever see again!
Bill Smith:
[
Doesn't speak, but his eyes narrow]
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