this post was submitted on 18 Aug 2023
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I think it has to be A. You figure that if it were B, the people on the track would suddenly be traveling at a high velocity, but the train's velocity wouldn't be impacted at all, since there was no impact between the train and the people. Wouldn't this mean that the portal had created energy, which is impossible?
This is how I always look at it. The portals don’t actually move what is behind them, they are just a portal to that place, so there is no momentum to impart