If the time Travelers came from the past instead of the future, the password sha...

		rsecora on July 5, 2020 \| parent \| context \| favorite \| on: Ask HN: What weird or hard problems are you trying... 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-...

But we know that is very possible to do already, via relativistic effects.