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A comment on Ask HN: What weird or hard problems are you trying to solve?. Parent comment

Re:Ask HN: What weird or hard problems are you trying to solve? by rsecora on Sunday July 05, 2020 @07:12PM (#23742973)
If the time Travelers came from the past instead of the future, the password sharing is useless.

maybe they have jump [1] from the past after doing a change that alter your present (their future) trying to fix the future (your present).

[1] https://visual.ly/community/Infographics/entertainment/back-...

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Re:Ask HN: What weird or hard problems are you trying to solve? by adeledeweylopez on Sunday July 05, 2020 @07:20PM (#23743037)
But we know that is very possible to do already, via relativistic effects.
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