If you travel in time you should be aware that everything exist as "frames" of simultaneously existing parallell universes.
You are not really traveling in time as much as you are travelling into a simultaneously existing parallell universe that represents "the past" linearly speaking...
Hence, killing your father, for example, does not mean you seize to exist...
It is for this reason that I always put quotation marks around "time travel", your statements about parallel universes are not correct and I cannot explain why for security reasons.
Also because there is a bias in looking at the past from the present, or the future from the present. It is likely that even if I go out on a limb and explain it to you you will not understand it and it will seem apocryphal to you.
Understanding the existence of that bias was key to technological advancement.
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"It is for this reason that I always put quotation marks around "time travel", your statements about parallel universes are not correct and I cannot explain why for security reasons."
What reason? If what I said is incorrect, what is your reason for using quotation marks...
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The whole parallel universe thing is so lame. Way overhyped such that its in every scifi movie. And yet, it is only a theory made popular because it works like magic where anything is possible. A lazy man's tool for making things they want happen without any explanation.
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